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this paper provides an extended exploration of the inverse-chirp gravitational-wave signals from stellar collapse in massive scalar-tensor gravity reported in [phys. rev. lett. 119, 201103, 10.1103/physrevlett.119.201103]. we systematically explore the parameter space that characterizes the progenitor stars, the equati... | core collapse in massive scalar-tensor gravity |
mirror thermal noise will be a main limitation for the sensitivities of the next-generation ground-based gravitational-wave detectors (einstein telescope and cosmic explorer) at signal frequencies around 100 hz. using a higher-order spatial laser mode instead of the fundamental mode is one proposed method to further mi... | observation of squeezed states of light in higher-order hermite-gaussian modes with a quantum noise reduction of up to 10 db |
cosmological applications of h ii galaxies and giant extragalactic h ii regions (gehrs) to construct the hubble diagram at high redshifts require knowledge of the "l-σ" relation of the standard candles used. in this paper, we study the properties of a large sample of 156 sources (25 high-z h ii galaxies, 107 local h ii... | exploring the "l-σ" relation of h ii galaxies and giant extragalactic h ii regions acting as standard candles |
we extend recent theoretical results on the propagation of linear gravitational waves (gws), including their associated memories, in spatially flat friedmann-lemaître-robertson-walker universes, for all spacetime dimensions higher than 3. by specializing to a cosmology driven by a perfect fluid with a constant equation... | more on cosmological gravitational waves and their memories |
in the observation of gravitational waves (gws) from a compact binary coalescence where the mass of one of the companions is <5 m⊙ the nature of the object is ambiguous until the measurements of tidal effects give evidence for the presence of a neutron star (ns) or a low mass black hole (bh). the relevance of tidal ... | leveraging gravitational-wave memory to distinguish neutron star-black hole binaries from black hole binaries |
an electroweak baryogenesis (ewbg) mechanism mediated by τ lepton transport is proposed. we extend the standard model with a real singlet scalar s to trigger the strong first-order electroweak phase transition (sfoewpt), and with a set of leptophilic dimension-5 operators to provide sufficient cp violating source. we d... | lepton-mediated electroweak baryogenesis, gravitational waves and the 4τ final state at the collider |
a space-based gravitational-wave detector, lisa, consists of a triangle of three spacecrafts with a separation distance of 2.5 million kilometers in a heliocentric orbit behind the earth. like lisa, taiji is compose of a triangle of three spacecrafts with a separation distance of 3 million kilometers in a heliocentric ... | the lisa-taiji network: precision localization of massive black hole binaries |
we study the dynamics of merging compact binaries near a rotating supermassive black hole (smbh) in a hierarchical triple configuration. we include various general relativistic effects that couple the inner orbit, the outer orbit and the spin of the smbh. during the orbital decay due to gravitational radiation, the inn... | merging compact binaries near a rotating supermassive black hole: eccentricity excitation due to apsidal precession resonance |
a significant number of stellar-mass black-hole (bh) binaries may merge in galactic nuclei or in the surrounding gas disks. with purposed space-borne gravitational-wave observatories, we may use such a binary as a signal carrier to probe modulations induced by a central supermassive bh (smbh), which further allows us t... | direct determination of supermassive black hole properties with gravitational-wave radiation from surrounding stellar-mass black hole binaries |
for the observer at infinity, a schwarzschild black hole serves as an attractive opaque disk with a radius of 3 √{3 }m that will produce the diffraction pattern of gravitational waves (gws). in this study, we demonstrate that a bright spot, which is a diffraction effect analogous to the poisson-arago spot in optics, wi... | poisson-arago spot for gravitational waves |
the energy spectrum of gravitational waves (gws), which depicts the energy of gws per unit volume of space per logarithmic frequency interval normalized to the critical density of the universe, is a widely used way for quantifying the sensitivity of gw detectors and the strength of gws, since it has the advantage of ha... | energy spectrum of gravitational waves |
in an earlier work [s. kastha et al., phys. rev. d 98, 124033 (2018), 10.1103/physrevd.98.124033], we developed the parametrized multipolar gravitational wave phasing formula to test general relativity, for the nonspinning compact binaries in quasicircular orbit. in this paper, we extend the method and include the impo... | testing the multipole structure and conservative dynamics of compact binaries using gravitational wave observations: the spinning case |
if a small "particle" of mass μ m (with μ ≪1 ) orbits a black hole of mass m , the leading-order radiation-reaction effect is an o (μ2) "self-force" acting on the particle, with a corresponding o (μ ) "self-acceleration" of the particle away from a geodesic. such "extreme-mass-ratio inspiral" systems are likely to be i... | scalar self-force for highly eccentric equatorial orbits in kerr spacetime |
we derive simple analytic expressions for the (coherent and semicoherent) phase metrics of continuous-wave sources in low-eccentricity binary systems for the two regimes of long and short segments compared to the orbital period. the resulting expressions correct and extend previous results found in the literature. we p... | directed searches for continuous gravitational waves from binary systems: parameter-space metrics and optimal scorpius x-1 sensitivity |
the sensitivity of gravitational wave searches for binary black holes is estimated via the injection and posterior recovery of simulated gravitational wave signals in the detector data streams. when a search reports no detections, the estimated sensitivity is then used to place upper limits on the coalescence rate of t... | sensitivity of gravitational wave searches to the full signal of intermediate-mass black hole binaries during the first observing run of advanced ligo |
we introduce an improved version of the eccentric, nonspinning, inspiral-gaussian-process merger approximant (enigma) waveform model that utilizes a more stable and robust numerical method to smoothly connect the analytical relativity-based inspiral evolution with the numerical relativity-based merger phase. we find th... | observation of eccentric binary black hole mergers with second and third generation gravitational wave detector networks |
a light scalar dark matter (dm) is allowed in a wide range of its mass and interaction types. we show that the light scalar dm may be probed in a new way from final years of neutron-star (ns) binary inspirals. if the dm interacts with the neutron, its long wave coherence in the background can induce the time-oscillatin... | new probe of dark matter-induced fifth force with neutron star inspirals |
the most sensitive search pipelines for gravitational waves from compact binary mergers use matched filters to extract signals from the noisy data stream coming from gravitational wave detectors. matched-filter searches require banks of template waveforms covering the physical parameter space of the binary system. unfo... | efficient gravitational wave template bank generation with differentiable waveforms |
if the refractive index of the tensor modes increases during a conventional inflationary stage of expansion the relic graviton spectrum is tilted towards high frequencies. two apparently diverse parametrizations of this effect are shown to be related by a rescaling of the four-dimensional metric through a conformal fac... | the propagating speed of relic gravitational waves and their refractive index during inflation |
the einstein telescope (et) has been proposed as one of the third-generation gravitational wave (gw) detectors. the sensitivity of et would be a factor of 10 better than the second-generation gw detector, advanced ligo (aligo); thus, the gw source parameters could be measured with much better accuracy. in this work, we... | improvement of the parameter measurement accuracy by the third-generation gravitational wave detector einstein telescope |
we compute the energy flux of the gravitational waves radiated by a particle of mass μ in circular orbits around a rotating black hole of mass m up to the 11th post-newtonian order (11pn), i.e. v^{22} beyond the leading newtonian approximation where v is the orbital velocity of the particle [l. blanchet, living rev. re... | gravitational waves from a particle in circular orbits around a rotating black hole to the 11th post-newtonian order |
three-mode parametric interactions occur in triply resonant optomechanical systems: photons from an optical pump mode are coherently scattered to a high-order mode by mechanical motion of the cavity mirrors, and these modes resonantly interact via radiation pressure force when some conditions are met. they can either p... | observation of three-mode parametric instability |
gravitational waves might help resolve the tension between early and late universe measurements of the hubble constant, and this possibility can be enhanced with a gravitational wave detector in the decihertz band as we will demonstrate in this study. such a detector is particularly suitable for the multiband observati... | multiband gravitational wave cosmography with dark sirens |
massive black holes (mbhs) are crucial in shaping their host galaxies. how the mbh co-evolves with its host galaxy is a pressing problem in astrophysics and cosmology. the valuable information carried by the binary mbh is encoded in the gravitational waves (gws), which will be detectable by the space-borne gw detector ... | including higher harmonics in gravitational-wave parameter estimation and cosmological implications for lisa |
searches for continuous gravitational waves (gw) from unknown galactic neutron stars provide limits on the shapes of neutron stars. a rotating neutron star will produce gw if asymmetric deformations exist in its structure that are characterized by the star's ellipticity. in this study, we use a simple model of the spat... | modeling the galactic neutron star population for use in continuous gravitational-wave searches |
stellar-mass binary black holes (bbhs) may merge in the vicinity of a supermassive black hole (smbh). it is suggested that the gravitational wave (gw) emitted by a bbh has a high probability to be lensed by the smbh if the bbh's orbit around the smbh (i.e., the outer orbit) has a period of less than a year and is less ... | detecting gravitational lensing in hierarchical triples in galactic nuclei with space-borne gravitational-wave observatories |
gravitational waves (gws) imprint apparent doppler shifts on the frequency of photons propagating between an emitter and detector of light. this forms the basis of a method to detect gws using doppler velocimetry between pairs of satellites. operating in the micro-hertz to milli-hertz gravitational frequency band, this... | optical frequency standards for gravitational wave detection using satellite doppler velocimetry |
the laser interferometer space antenna (lisa) is a future space-based gravitational wave detector designed to be sensitive to sources radiating in the low frequency regime (0.1 mhz to 1 hz). lisa's interferometer signals will be dominated by laser frequency noise which has to be suppressed by about seven orders of magn... | arm locking performance with the new lisa design |
the future space-borne detectors will provide the possibility to detect gravitational waves emitted from extreme mass ratio inspirals of stellar-mass compact objects into supermassive black holes. it is natural to expect that the spin of the compact object and cosmological constant will affect the orbit of the inspiral... | motion deviation of test body induced by spin and cosmological constant in extreme mass ratio inspiral binary system |
we report on the design and sensitivity of a new torsion pendulum for measuring the performance of ultra-precise inertial sensors and for the development of associated technologies for space-based gravitational wave observatories and geodesy missions. the apparatus comprises a 1 m-long, 50 μm-diameter tungsten fiber th... | a new torsion pendulum for gravitational reference sensor technology development |
this paper describes the fermilab holometer, an instrument for measuring correlations of position variations over a four-dimensional volume of space-time. the apparatus consists of two co-located, but independent and isolated, 40 m power-recycled michelson interferometers, whose outputs are cross-correlated to 25 mhz. ... | the holometer: an instrument to probe planckian quantum geometry |
the laser interferometer space antenna (lisa) will open a rich discovery space in the millihertz gravitational wave band. in addition to the anticipated signals from many millions of binary systems, this band may contain new and previously unimagined sources for which we currently have no models. to detect unmodeled an... | detecting gravitational wave bursts with lisa in the presence of instrumental glitches |
the arm length and the isolation in space enable the laser interferometer space antenna (lisa) to probe for signals unattainable on the ground, opening a window to the subhertz gravitational-wave universe. the coupling of unavoidable angular spacecraft jitter into the longitudinal displacement measurement, an effect kn... | optical suppression of tilt-to-length coupling in the lisa long-arm interferometer |
localizing the sky position of the gravitational wave source is a key scientific goal for gravitational wave observations. employing the fisher information matrix approximation, we compute the angular resolutions of lisa and tianqin, two planned space-based gravitational wave detectors, and examine how detectors' confi... | sky localization of space-based gravitational wave detectors |
precision cosmology with gravitational wave (gw) sources requires a deeper understanding of the interplay between gw source population and cosmological parameters governing the dynamics of the universe. with the swift increase in gw detections, it is necessary to develop a tool for exploring many aspects of cosmology a... | gwsim: python package for creating mock gw samples for different astrophysical populations and cosmological models of binary black holes |
several large-scale experimental facilities and space-missions are being suggested to probe the universe across the gravitational-wave (gw) spectrum. here we propose gravitational-wave lunar observatory for cosmology (gloc) - the first concept design in the nasa artemis era for a gw observatory on the moon. using feasi... | gravitational-wave lunar observatory for cosmology |
gravitational waves emitted by inner binaries in hierarchical triple systems are interesting astrophysical candidates for space-based detectors like the laser interferometer space antenna, lisa. in the presence of a third body, such as a supermassive black hole, an inner binary consisting of intermediate mass black hol... | ready-to-use analytic model for gravitational waves from a hierarchical triple with kozai-lidov oscillations |
the laser interferometer space antenna (lisa) and its metrology chain have to fulfill stringent performance requirements to enable the space-based detection of gravitational waves. this implies the necessity of performance verification methods. in particular, the extraction of the interferometric phase, implemented by ... | picometer-stable hexagonal optical bench to verify lisa phase extraction linearity and precision |
time-delay interferometry (tdi) is a critical data post-processing technique in space-borne laser interferometer gravitational wave detection, which is developed to suppress the overwhelming laser phase noise below the instrumental noise floor by time-shifting and synthesizing the interferometric data streams. there ar... | clock noise reduction in geometric time delay interferometry combinations |
in 2016 and 2017, the lisa pathfinder mission successfully proved that the technologies for the space-based gravitational wave detector lisa are ready. lisa is now scheduled to launch in the early 2030s, to open a so far unexploited scientific field. | space-based gravitational wave detection and how lisa pathfinder successfully paved the way |
clock noise is one of the dominant noises in the space-borne gravitational wave (gw) detection. to suppress this noise, the clock noise-calibrated time-delay-interferometry (tdi) technique is proposed. in this technique, an inter-spacecraft clock tone transfer chain is necessary to obtain the comparison information of ... | influence of eom sideband modulation noise on space-borne gravitational wave detection |
according to the "no-hair" conjecture, a kerr black hole (bh) is completely described by its mass and spin. in particular, the spin-induced quadrupole moment of a kerr bh with mass m and dimensionless spin χ can be written as q =-κ m3χ2, where κbh=1 . thus, by measuring the spin-induced quadrupole parameter κ , we can ... | constraints on the binary black hole nature of gw151226 and gw170608 from the measurement of spin-induced quadrupole moments |
we use gravitational waves (gws) from binary black holes (bbhs) and neutron stars inspiraling into intermediate-mass black holes to evaluate how accurately the future space-based gw detectors such as lisa, taiji, and tianqin and their combined networks can determine source parameters and constrain alternative theories ... | testing alternative theories of gravity with space-based gravitational wave detectors |
the sky localization of the gravitational wave (gw) source is an important scientific objective for gw observations. a network of space-based gw detectors dramatically improves the sky localization accuracy compared with an individual detector not only in the inspiral stage but also in the ringdown stage. it is interes... | source localizations with the network of space-based gravitational wave detectors |
the next decade is expected to see the launch of one or more space-based gravitational wave detectors: the european-led laser interferometer space antenna (lisa), and one or more chinese mission concepts, taiji and tianqin. one of the primary scientific targets for these missions is the merger of black holes with masse... | low latency detection of massive black hole binaries |
this letter derives explicit factors linking mode-mismatch-induced power losses in hermite-gauss optical modes to the losses of the fundamental spatial mode. higher-order modes are found to be more sensitive to beam parameter mismatches. this is particularly relevant for gravitational-wave detectors, where lasers emplo... | increased sensitivity of higher-order laser beams to mode mismatches |
we perform an anisotropic search for the stochastic gravitational-wave (gw) background by decomposing the gravitational-wave sky into its spherical harmonics components. previous analyses have used the diffraction limit to define the highest-order spherical harmonics components used in this search. we investigate wheth... | angular resolution of the search for anisotropic stochastic gravitational-wave background with terrestrial gravitational-wave detectors |
we consider stable mass transfer from the secondary to the primary of an extreme mass ratio binary system. we show that when the mass transfer is sufficiently fast, mass leakage occurs through the outer lagrange point l2, in addition to the usual transfer through l1. we provide an analytical estimate for the mass leaka... | mass-loss through the l2 lagrange point - application to main-sequence emri |
the best measurements of space and time currently possible (e.g., gravitational-wave detectors and optical reference cavities) rely on optical resonators, and are ultimately limited by thermally induced fluctuations in the reflective coatings which form the resonator. we present measurements of coating thermal noise in... | direct measurement of coating thermal noise in optical resonators |
cold-atom interferometers commonly face systematic effects originating from the coupling between the trajectory of the atomic wave packet and the wavefront of the laser beams driving the interferometer. detrimental for the accuracy and the stability of such inertial sensors, these systematics are particularly enhanced ... | accurate trajectory alignment in cold-atom interferometers with separated laser beams |
direct observation of gravitational waves offers us numerous novel possibilities to further explore the universe. in practice, the efficiency of the experimental facility for a given gravitational wave source can be measured in terms of the sensitivity function of the instrument. the latter essentially indicates the le... | sensitivity functions of space-borne gravitational wave detectors for arbitrary time-delay interferometry combinations regarding nontensorial polarizations |
we consider the cross-correlation search for periodic gravitational waves and its potential application to the low-mass x-ray binary sco x-1. this method coherently combines data not only from different detectors at the same time, but also data taken at different times from the same or different detectors. by adjusting... | model-based cross-correlation search for gravitational waves from scorpius x-1 |
gravitational waves are excellent tools to probe the foundations of general relativity in the strongly dynamical and nonlinear regime. one such foundation is lorentz symmetry, which can be broken in the gravitational sector by the existence of a preferred time direction and, thus, a preferred frame at each spacetime po... | projected constraints on lorentz-violating gravity with gravitational waves |
while recent gravitational wave observations by ligo and virgo allow for tests of general relativity in the extreme gravity regime, these observations are still blind to a large swath of phenomena outside these instruments' sensitivity curves. future gravitational-wave detectors, such as lisa, will enable probes of lon... | chaos in quadratic gravity |
cryogenic cooling of the test masses of interferometric gravitational wave detectors is a promising way to reduce thermal noise. however, cryogenic cooling limits the incident power to the test masses, which limits the freedom of shaping the quantum noise. cryogenic cooling also requires short and thick suspension fibe... | particle swarm optimization of the sensitivity of a cryogenic gravitational wave detector |
the laser interferometer space antenna (lisa) is a gravitational wave detector, which aims to detect 10-20 strains in the frequency range from 0.1 mhz to 0.1 hz. it is a constellation of three spacecrafts, an equilateral triangle with side length of m, where interferometry monitors the spacecraft distances. aberrations... | coupling of wavefront errors and jitter in the lisa interferometer: far-field propagation |
time delay interferometry (tdi) is an algorithm proposed to suppress the laser frequency noise in space-borne gravitational-wave detectors. as a post-processing technique, it is implemented by constructing a virtual equal-arm interferometer through an appropriate combination of the time-shifted data streams. such an ap... | geometric approach for the modified second generation time delay interferometry |
the detection of a primordial stochastic gravitational wave background has the potential to reveal unprecedented insights into the early universe, and possibly into the dynamics of inflation. generically, uv-complete inflationary models predict an abundance of light scalars, so any inflationary stochastic background ma... | primordial stochastic gravitational wave backgrounds from a sharp feature in three-field inflation. part i. the radiation era |
high-precision inertial sensors or accelerometers can provide references for free-falling motion in gravitational fields in space. they serve as the key payloads for gravity recovery missions such as champ, the grace-type missions, and the planned next-generation gravity missions. in this work, a systematic method for ... | a systematic approach for inertial sensor calibration of gravity recovery satellites and its application to taiji-1 mission |
supermassive black hole binaries (smbhbs) are expected to be detected by the future space-based gravitational-wave detector lisa with a large signal-to-noise ratio (snr). this prospect enhances the possibility of differentiating higher harmonics in the inspiral-merger-ringdown (imr) waveform. in this study, we test the... | detectability of higher harmonics with lisa |
we derive the gravitational waveform from the collapse of a rapidly rotating supermassive star (sms) core leading directly to a seed of a supermassive black hole (smbh) in axisymmetric numerical-relativity simulations. we find that the peak strain amplitude of gravitational waves emitted during the black hole formation... | gravitational waves from supermassive stars collapsing to a supermassive black hole |
the recent gravitational wave observations by the ligo/virgo collaboration have allowed the first tests of general relativity in the extreme gravity regime, when comparable-mass black holes and neutron stars collide. future space-based detectors, such as the laser interferometer space antenna, will allow tests of einst... | the exact dynamical chern-simons metric for a spinning black hole possesses a fourth constant of motion: a dynamical-systems-based conjecture |
the detections of gravitational waves (gws) from binary neutron star systems and neutron star-black hole systems provide new insights into dense matter properties in extreme conditions and associated high-energy astrophysical processes. however, currently, information about the neutron star equation of state (eos) is e... | neutron star-neutron star and neutron star-black hole mergers: multiband observations and early warnings |
large-scale high sensitivity laser gyroscopes have important applications for ground-based and space-based gravitational wave detection. we report on the development of a 3 m × 3 m heterolithic passive resonant gyroscope (hust-1) which is installed on the ground of a cave laboratory. we operate the hust-1 on different ... | 3 m × 3 m heterolithic passive resonant gyroscope with cavity length stabilization |
the csi detectors of the high energy x-ray telescope of the hard x-ray modulation telescope (hxmt/csi) can be used for gamma-ray all sky monitoring and searching for the electromagnetic counterpart of gravitational wave source. the instrumental responses are mainly obtained by monte carlo simulation with the geant4 too... | calibration of the instrumental response of insight-hxmt/he csi detectors for gamma-ray monitoring |
as part of the research on thermal noise reduction in gravitational-wave detectors, we experimentally demonstrate the conversion of a fundamental tem00 laser mode at 1064 nm to higher-order hermite-gaussian modes (hg) of arbitrary order via a commercially available liquid crystal spatial light modulator. we particularl... | higher-order hermite-gauss modes for gravitational waves detection |
space-borne gravitational-wave (gw) detectors observing at millihertz and decihertz frequencies are expected to detect large numbers of quasimonochromatic signals. the first and second time derivative of the gw frequency (f˙0 and f¨0) can be measured for the most favorable sources and used to look for negative post-new... | constraining the evolution of newton's constant with slow inspirals observed from spaceborne gravitational-wave detectors |
we use balanced optical low-coherence interferometry to measure the ultralow light power back-reflected and/or back-scattered by optical interfaces. indeed, backscattered light from optical surfaces can be a critical source of noise in interferometric gravitational-wave detectors, such as the laser interferometer gravi... | detection of ultralow light power back-reflected or back-scattered by optical components using balanced low-coherence interferometry |
tunable open-access fabry–pérot microcavities enable the combination of cavity enhancement with high resolution imaging. to assess the limits of this technique originating from background variations, we perform high-finesse scanning cavity microscopy of pristine planar mirrors. we observe spatially localized features o... | transverse-mode coupling effects in scanning cavity microscopy |
time-delay interferometry is put forward to improve the signal-to-noise ratio of space-borne gravitational wave detectors by canceling the large laser phase noise with different combinations of measured data. based on the michelson data combination, the sensitivity function of the detector can be obtained by averaging ... | sensitivity functions for space-borne gravitational wave detectors |
unlike ground-based gravitational wave detectors, space-based gravitational wave detectors can detect the ringdown signals from massive black hole mergers with large signal-to-noise ratios, help to localize sources and extract their parameters. to reduce the computation time in the fisher information matrix analysis, w... | parameter estimation for space-based gravitational wave detectors with ringdown signals |
one of the primary objectives for space-borne gravitational wave detectors is the detection of extreme-mass-ratio inspirals (emris). this undertaking poses a substantial challenge because of the complex and long emri signals, further complicated by their inherently faint signal. in this research, we introduce a 2-layer... | detecting extreme-mass-ratio inspirals for space-borne detectors with deep learning |
searches for gravitational waves produced by coalescing black hole binaries with total masses ≳25 m⊙ use matched filtering with templates of short duration. non-gaussian noise bursts in gravitational wave detector data can mimic short signals and limit the sensitivity of these searches. previous searches have relied on... | multivariate classification with random forests for gravitational wave searches of black hole binary coalescence |
space-based gravitational wave detectors such as tianqin, lisa, and taiji have the potential to outperform themselves through joint observation. to achieve this, it is desirable to practice joint data analysis in advance on simulated data that encodes the intrinsic correlation among the signals found in different detec... | gwspace: a multi-mission science data simulator for space-based gravitational wave detection |
the gravitational wave high-energy electromagnetic counterpart all-sky monitor (gecam) satellite consists of two small satellites. each gecam payload contains 25 gamma ray detectors (grd) and 8 charged particle detectors (cpd). grd is the main detector which can detect gamma-rays and particles and localize the gamma-ra... | quality assurance test and failure analysis of sipm arrays of gecam satellites |
extreme-mass-ratio inspirals are important sources for space-borne gravitational-wave detectors. such a source normally consists of a stellar-mass black hole (bh) and a kerr supermassive bh (smbh), but recent astrophysical models predict that the small body could also be a stellar-mass binary bh (bbh). a bbh reaching s... | binaries wandering around supermassive black holes due to gravitoelectromagnetism |
gas accretion of embedded stellar-mass black holes (sbhs) or stars in the accretion disc of active galactic nuclei (agns) will modify the mass distribution of these sbhs and stars, which will also affect the migration of the sbhs/stars. with the introduction of the mass accretion effect, we simulate the evolution of th... | accretion-modified stellar-mass black hole distribution and milli-hz gravitational wave backgrounds from galaxy centre |
detecting and coherently characterizing thousands of gravitational-wave signals is a core data-analysis challenge for the laser interferometer space antenna (lisa). transient artifacts, or "glitches", with disparate morphologies are expected to be present in the data, potentially affecting the scientific return of the ... | glitch systematics on the observation of massive black-hole binaries with lisa |
space-based gravitational wave (gw) detector such as the lisa (laser interferometer space antenna) mission requires high-precision and stability of the triangular formation. the dynamic environment of the detectors is complex, the science requirements for the formation are tight, and consequently, design and optimizati... | design and optimization of stable initial heliocentric formation on the example of lisa |
continuous-wave (cw) gravitational waves (gws) call for computationally-intensive methods. low signal-to-noise ratio signals need templated searches with long coherent integration times and thus fine parameter-space resolution. longer integration increases sensitivity. low-mass x-ray binaries (lmxbs) such as scorpius x... | resampling to accelerate cross-correlation searches for continuous gravitational waves from binary systems |
the quantum locking technique, which uses additional short low-loss sub-cavities, is effective in reducing quantum noise in space gravitational wave antenna decigo. however, the quantum noise of the main interferometer depends on the control systems in the sub-cavities. here we demonstrate a new method to optimize the ... | optimization of quantum noise by completing the square of multiple interferometer outputs in quantum locking for gravitational wave detectors |
the proposed space-borne laser interferometric gravitational wave (gw) observatory tianqin adopts a geocentric orbit for its nearly equilateral triangular constellation formed by three identical drag-free satellites. the geocentric distance of each satellite is ≈1.0 ×105 km , which makes the armlengths of the interfero... | orbital effects on time delay interferometry for tianqin |
future space-borne gravitational-wave detectors will observe the gravitational waves in the milli-hz. extreme-mass-ratio inspirals with central supermassive black holes are very important sources that could provide the information of the vicinity of black holes. the event horizon separates the inner region of a black h... | gravitational radiation pulses from extreme-mass-ratio-inspiral system with a supermassive boson star |
amigo is a first-generation astrodynamical middle-frequency interferometric gravitational wave (gw) observatory. the scientific goals of amigo are to bridge the spectra gap between first-generation high-frequency and low-frequency gw sensitivities: to detect intermediate mass bh coalescence; to detect inspiral phase an... | astrodynamical middle-frequency interferometric gravitational wave observatory amigo: mission concept and orbit design |
the sensitivity of all-sky searches for gravitational-wave pulsars is primarily limited by the finite availability of computing resources. semicoherent searches are a widely used method of maximizing sensitivity to gravitational-wave pulsars at fixed computing cost: the data from a gravitational-wave detector are parti... | parameter-space metric for all-sky semicoherent searches for gravitational-wave pulsars |
the gravitational wave measurements of spin-induced multipole moment coefficients of a binary black hole system can be used to distinguish black holes from other compact objects [1]. here, we apply the idea proposed in reference [1] to binary systems composed of supermassive and intermediate-mass black holes and derive... | testing the kerr nature of supermassive and intermediate-mass black hole binaries using spin-induced multipole moment measurements |
quantum gravity corrections have been speculated to lead to modifications to space-time geometry near black-hole horizons. such structures may reflect gravitational waves, causing echoes that follow the main gravitational waves from binary black-hole coalescence. by studying two phenomenological models of the near-hori... | searching for near-horizon quantum structures in the binary black-hole stochastic gravitational-wave background |
an extreme mass ratio inspiral takes place when a compact stellar object is inspiraling into a supermassive black hole due to gravitational radiation reaction. gravitational waves (gws) from this system can be calculated using the teukolsky equation (te). in our case, we compute the asymptotic gw fluxes of a spinning b... | gravitational wave templates from extreme mass ratio inspirals |
gravitational wave memory is an important prediction of general relativity, which has not been detected yet. amounts of memory events can form a stochastic gravitational wave memory background. here we find that memory background can be described as a brownian motion in the condition that the observation time is longer... | stochastic gravitational wave background due to gravitational wave memory |
the proposed third-generation gravitational-wave detectors einstein telescope will have a triangular design that consists of three colocated interferometers. summing the strain outputs from the three interferometers will cancel any gravitational-wave signal and the resultant signal-free stream is known as null stream. ... | signal space in the triangular network of the einstein telescope |
binary neutron star mergers are rich laboratories for physics, accessible with ground-based interferometric gravitational-wave detectors such as the advanced ligo and advanced virgo. if a neutron star remnant survives the merger, it can emit gravitational waves that might be detectable with the current or next generati... | constraining the gravitational-wave afterglow from a binary neutron star coalescence |
extreme-mass-ratio-inspiral observations from future space-based gravitational-wave detectors such as lisa will enable strong-field tests of general relativity with unprecedented precision, but at prohibitive computational cost if existing statistical techniques are used. in one such test that is currently employed for... | towards a framework for testing general relativity with extreme-mass-ratio-inspiral observations |
owing to the extreme smallness of any noncommutative scale that may exist in nature, both in the spatial and momentum sector of the quantum phase space, a credible possibility of their detection lies in the gravitational wave (gw) detection scenario, where one effectively probes the relative length-scale variations ∼o ... | quantum mechanical systems interacting with different polarizations of gravitational waves in noncommutative phase space |
large scale laser interferometric gravitational wave detectors (gwds), such as geo 600 require high quality optics to reach their design sensitivity. the inevitable surface imperfections, inhomogeneities and light-absorption induced thermal lensing in the optics can convert laser light from the fundamental mode to unwa... | matrix heater in the gravitational wave observatory geo 600 |
all-sky and wide parameter space searches for continuous gravitational waves are generally template-matching schemes which test a bank of signal waveforms against data from a gravitational wave detector. such searches can offer optimal sensitivity for a given computing cost and signal model, but are highly-tuned to spe... | generalized application of the viterbi algorithm to searches for continuous gravitational-wave signals |
superposition of gravitational waves generated by astrophysical sources is expected to give rise to the stochastic gravitational-wave background. we focus on the background generated by the ring-down of black holes produced in the stellar core collapse events, which is one of several mechanisms for gravitational wave p... | model of the stochastic gravitational-wave background due to core collapse to black holes |
space-based gravitational wave (gw) detectors will be able to observe signals from sources that are otherwise nearly impossible from current ground-based detection. consequently, the well established signal detection method, matched filtering, will require a complex template bank, leading to a computational cost that i... | space-based gravitational wave signal detection and extraction with deep neural network |
atom interferometers (ais) as gravitational-wave (gw) detectors have been proposed a decade ago. both ground and space-based projects will be in construction and preparation in the near future. in this paper, for the first time, we investigate the potential of the space-borne ais on detecting gw standard sirens and hen... | space-borne atom interferometric gravitational wave detections. part i. the forecast of bright sirens on cosmology |
the direct detection of gravitational waves opens the possibility to test general relativity and its alternatives in the strong field regime. here we focus on the test of the existence of extra dimensions. the classification of gravitational waves in metric gravity theories according to their polarizations in higher-di... | classification of gravitational waves in higher-dimensional space-time and possibility of observation |
gravitational wave echoes may provide a smoking gun signal for new physics in the immediate vicinity of black holes. as a quasiperiodic signal in time, echoes are characterized by the nearly constant time delay, and its precise measurement can help reveal a planck-scale deviation outside of the would-be horizon. differ... | gravitational wave echoes search with combs |
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