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we describe a general mathematical framework for χ2 discriminators in the context of the compact binary coalescence (cbc) search. we show that with any χ2 is associated a vector bundle over the signal manifold, that is, the manifold traced out by the signal waveforms in the function space of data segments. the χ2 is th... | a unified approach to χ2 discriminators for searches of gravitational waves from compact binary coalescences |
we present a search for continuous gravitational waves emitted by neutron stars in binary systems conducted on data from the early third observing run of the advanced ligo and advanced virgo detectors using the semicoherent, gpu-accelerated, binaryskyhough pipeline. the search analyzes the most sensitive frequency band... | an all-sky search in early o3 ligo data for continuous gravitational-wave signals from unknown neutron stars in binary systems |
tianqin is a project of a space-based gravitational wave detector for detecting gw events in the millihertz frequency range. the space-based detector must be implemented on three identical drag-free spacecraft orbiting around the earth. the key technologies that form the principles of operation of the space-based gw de... | tianqin space-based gravitational wave detector: key technologies and current state of implementation |
in this work, we explore the effects of surrounding dark matter featuring different equations of state on the axial gravitational quasinormal modes of supermassive black holes situated at the center of galaxies. our attention primarily rests on dark matter exhibiting a spike structure, originating from relativistic bon... | influence of dark matter equation of state on the axial gravitational ringing of supermassive black holes |
we study the dynamics of the electroweak phase transition in a simple extension of the standard model where the higgs sector is extended by adding an s u (2 )l triplet with hypercharge y =2 . by making random scans over the parameters of the model, we show that there are regions consistent with constraints from collide... | electroweak phase transition in an inert complex triplet model |
cyber infrastructure will be a critical consideration in the development of next generation gravitational-wave detectors. the demand for data analysis computing in the 3g era will be driven by the high number of detections as well as the expanded search parameter space for compact astrophysical objects and the subseque... | gravitational wave data analysis: computing challenges in the 3g era |
minute-long gravitational wave (gw) transients are events lasting from a few to hundreds of seconds. in opposition to compact binary mergers, their gw signals cover a wide range of poorly understood astrophysical phenomena such as accretion disk instabilities and magnetar flares. the lack of accurate and rapidly genera... | machine learning algorithm for minute-long burst searches |
coherent waveburst is a generic, multidetector gravitational wave burst search based on the excess power approach. the coherent waveburst algorithm currently employed in the all-sky short-duration gravitational wave burst search uses a conditional approach on selected attributes in the multidimensional event attribute ... | utilizing gaussian mixture models in all-sky searches for short-duration gravitational wave bursts |
reduced order quadrature (roq) methods can greatly reduce the computational cost of gravitational wave (gw) likelihood evaluations and therefore greatly speed up parameter estimation analyses, which is a vital part to maximize the science output of advanced gw detectors. in this paper, we do an in-depth study of roq te... | efficient reduced order quadrature construction algorithms for fast gravitational wave inference |
screened modified gravity (smg) is a unified theoretical framework that describes scalar-tensor gravity with a screening mechanism. based on the gravitational-wave (gw) waveform derived in our previous work, in this article we investigate the potential constraints on smg theory through gw observation by future spacebor... | constraining screened modified gravity with spaceborne gravitational-wave detectors |
there is strong astrophysical evidence that dark matter (dm) makes up some 27% of all mass in the universe. yet, beyond gravitational interactions, little is known about its properties or how it may connect to the standard model. multiple frameworks have been proposed, and precision measurements at low energy have prov... | constraining domain wall dark matter with a network of superconducting gravimeters and ligo |
one of the most important sources for future space-borne gravitational wave detectors such as tianqin and lisa is emri. it happens when a stellar orgin compact object orbiting around a massive black hole(mbh) in the center of galaxies and has many benefits in the study of astrophysics and fundamental theories. one of t... | augmented analytic kludge waveform with quadrupole moment correction |
the space-based detector lisa may observe gravitational waves from the early inspiral of stellar-mass black hole binaries, some of which could have significant eccentricity. current gravitational waveform templates are only valid for small orbital velocities (i.e., in a post-newtonian expansion) and small initial eccen... | convergence of fourier-domain templates for inspiraling eccentric compact binaries |
certain alternative theories of gravity predict that gravitational waves will disperse as they travel from the source to the observer. the recent binary black hole observations by advanced-ligo have set limits on a modified dispersion relation from the constraints on their effects on gravitational-wave propagation. usi... | projected constraints on the dispersion of gravitational waves using advanced ground- and space-based interferometers |
recent population synthesis simulations of pop iii stars suggest that the event rate of coalescence of ∼30 m⊙-30 m⊙ binary black holes can be high enough for the detection by the second generation gravitational wave detectors. the frequencies of chirp signal as well as quasinormal modes are near the best sensitivity of... | detecting quasinormal modes of binary black hole mergers with second-generation gravitational-wave detectors |
gravitational-wave sources can serve as standard sirens to probe cosmology by measuring their luminosity distance and redshift. such standard sirens are also useful to probe theories beyond general relativity with a modified gravitational-wave propagation. many of previous studies on the latter assume multimessenger ob... | probing modified gravitational-wave propagation through tidal measurements of binary neutron star mergers |
tianqin is a proposed space-borne gravitational-wave (gw) observatory composed of three identical satellites orbiting around the geocenter with a radius of 105 km. it aims at detecting gws in the frequency range of 0.1 mhz-1 hz. the detection of gw relies on the high-precision measurement of optical path length at the ... | analyses of laser propagation noises for tianqin gravitational wave observatory based on the global magnetosphere mhd simulations |
the deci-hertz interferometer gravitational-wave observatory (decigo) is the future japanese, outer space gravitational wave detector. we previously set the default design parameters to provide a good target sensitivity to detect the primordial gravitational waves (gws). however, the updated upper limit of the primordi... | improvement of the target sensitivity in decigo by optimizing its parameters for quantum noise including the effect of diffraction loss |
the space-based gravitational wave detectors at low frequencies has received great attention recently. due to lack of considering the relative motion between spacecrafts, the accuracy of current sensitivity models is inadequate for space-based gravitational wave detectors. in this paper, an accurate sensitivity model o... | sensitivity modeling and enhancement for space-based gravitational wave detector with optical atomic clocks under solar radiation disturbance |
in this work, we experimentally perform time delay interferometry by using a transfer oscillator, which is capable of reducing the laser frequency noise and the clock noise simultaneously in the post processing. the iodine frequency reference is coherently downconverted to the microwave frequency using a laser frequenc... | time delay interferometry with a transfer oscillator |
tianqin project is a space gravitational wave detection project initiated by sun yat-sen university. it has high requirements for detectors' orbit accuracy in the stages of orbit entry and scientific experiment operation. we obtain the different combinations of radial position errors and along-track velocity errors aft... | simulation and accuracy analysis of orbit determination for tianqin using slr data |
atom interferometers employing optical cavities to enhance the beam splitter pulses promise significant advances in science and technology, notably for future gravitational wave detectors. long cavities, on the scale of hundreds of meters, have been proposed in experiments aiming to observe gravitational waves with fre... | fundamental limitations of cavity-assisted atom interferometry |
we conduct an analysis of the measurement abilities of distinctive laser interferometer space antenna (lisa) detector designs, examining the influence of lisa's low-frequency performance on the detection and characterization of massive black hole binaries. we are particularly interested in lisa's ability to measure mas... | evaluating black hole detectability with lisa |
many recent works have shown that the angular resolution of ground-based detectors is too poor to characterize the anisotropies of the stochastic gravitational-wave background (sgwb). for this reason, we asked ourselves if a constellation of space-based instruments could be more suitable. we consider the laser interfer... | searching for anisotropic stochastic gravitational-wave backgrounds with constellations of space-based interferometers |
the argon content of titanium dioxide doped tantalum pentoxide thin films was quantified in a spatially resolved way using haadf images and dualeels. films annealed at 300$^{\circ}$c, 400$^{\circ}$c and 600$^{\circ}$c were investigated to see if there was a relationship between annealing temperature and bubble formatio... | argon bubble formation in tantalum oxide-based films for gravitational wave interferometer mirrors |
eccentricity of the inspiraling compact binaries can greatly improve the distance inference and source localization of dark sirens. in this paper, we continue the research for the space-borne atom interferometric gravitational-wave detector aedge and investigate the effects of eccentricity on the dark sirens observed b... | space-borne atom interferometric gravitational wave detections. part iii. eccentricity on dark sirens |
unruh dewitt (udw) detectors are important constructs in studying the dynamics of quantum fields in any geometric background. curvature also plays an important role in setting up the correlations of a quantum field in a given spacetime. for instance, massless fields are known to have large correlations in de sitter spa... | unruh dewitt probe of late time revival of quantum correlations in friedmann spacetimes |
temperature measurements by lidar are an important tool for the understanding of the mean state of the atmosphere as well as the propagation of gravity waves and thermal tides. though, mesospheric lidar soundings are often limited to nighttime conditions (e.g., solar zenith angle > 96°) due to the low signal-to-nois... | mesospheric temperature soundings with the new, daylight-capable iap rmr lidar |
the space gravitational wave detector uses the inter-satellite laser interferometer to measure a change in distance with ultra-high precision at the picometer level. its special differential wavefront sensing technology based on laser interference is used to obtain the ultra-high-precision relative attitude between spa... | frequency division control of line-of-sight tracking for space gravitational wave detector |
we analyse triple systems composed of the supermassive black hole (smbh) near the centre of m87 and a pair of black holes (bhs) with masses in the range of $10{-}10^3\, {\rm m}_{\odot }$ . we consider the post newtonian precession as well as the kozai-lidov interactions at the quadruple and octupole levels in modelling... | probingintermediate-mass black holes in m87 through multiwavelength gravitational wave observations |
bose-einstein condensates (becs) are macroscopic coherent matter waves that have revolutionized quantum science and atomic physics. they are essential to quantum simulation and sensing, for example underlying atom interferometers in space and ambitious tests of einstein's equivalence principle. the key to dramatically ... | continuous bose-einstein condensation |
extreme-mass-ratio inspirals (emris) are among the most important sources for future spaceborne gravitational wave detectors. in this kind of system, compact objects usually orbit around central supermassive black holes on complicated trajectories. usually, these trajectories are approximated as the geodesics of kerr s... | analytical effective one-body formalism for extreme-mass-ratio inspirals with eccentric orbits |
general relativity predicts only two tensor polarization modes for gravitational waves while at most six possible polarization modes are allowed in the general metric theory of gravity. the number of polarization modes is determined by the specific modified theory of gravity. therefore, the determination of polarizatio... | detection of gravitational wave mixed polarization with single space-based detectors |
neutron scattering is a well-established tool for the investigation of the static and dynamic properties of condensed matter systems over a wide range of spatial and temporal scales. many studies of high interest, however, can only be performed on small samples and typically require elaborate environments for variation... | nested mirror optics for neutron extraction, transport, and focusing |
gravitational wave (gw) detection in space is aimed at low frequency band (100nhz-100mhz) and middle frequency band (100mhz-10hz). the science goals are the detection of gws from (i) supermassive black holes; (ii) extreme-mass-ratio black hole inspirals; (iii) intermediate-mass black holes; (iv) galactic compact binari... | gravitational wave detection in space |
space-based gravitational-wave detectors offer new prospects for probing the interior of white dwarfs in binary systems through the imprints of tidal effects on the gravitational-wave signal. some of the binaries that will be observed could have evolved for long enough for the white dwarfs to be at least partially crys... | tidal deformability of crystallized white dwarfs in full general relativity |
validating the accelerating expansion of the universe is an important issue for understanding the evolution of the universe. by constraining the cosmic acceleration parameter $x_h$, we can discriminate between the $\lambda \mathrm{cdm}$ (cosmological constant plus cold dark matter) model and ltb (the lemaître-tolman-bo... | deep learning forecasts of cosmic acceleration parameters from deci-hertz interferometer gravitational-wave observatory |
strongly squeezed states of light are a key technology in boosting the sensitivity of interferometric setups, such as in gravitational-wave detectors. however, the practical use of squeezed states is limited by optical loss, which reduces the observable squeeze factor. here, we experimentally demonstrate that introduci... | mitigating mode-matching loss in nonclassical laser interferometry |
this paper reports on the design and characteristics of a compact module integrating an optical displacement sensor and an electromagnetic actuator for use with vibration-isolation systems installed in kagra, the 3-km baseline gravitational-wave detector in japan. in the technical concept, the module belongs to a famil... | compact integrated optical sensors and electromagnetic actuators for vibration isolation systems in the gravitational-wave detector kagra |
the mergers of supermassive black hole binaries can serve as standard sirens: the gravitational-wave (gw) analogue of standard candles. the upcoming space-borne gw detectors will be able to discover such systems and estimate their luminosity distances precisely. unfortunately, weak gravitational lensing can induce sign... | reducing the impact of weak-lensing errors on gravitational-wave standard sirens |
the gravitational wave event, gw190521, is the most massive binary black hole merger observed by ground-based gravitational wave observatories ligo/virgo to date. while the observed gravitational wave signal is mainly in the merger and ringdown phases, the inspiral gravitational wave signal of the gw190521-like binary ... | scope out multiband gravitational-wave observations of gw190521-like binary black holes with space gravitational wave antenna b-decigo |
the memory effect in gravitational wave (gw) signals is the phenomenon, wherein the relative position of two inertial gw detectors undergoes a permanent displacement owing to the passage of gws through them. measurement of the memory signal is an important target for future observations as it establishes a connection b... | frequency space derivation of linear and non-linear memory gravitational wave signals from eccentric binary orbits |
high-aspect-ratio mechanical resonators are pivotal in precision sensing, from macroscopic gravitational wave detectors to nanoscale acoustics. however, fabrication challenges and high computational costs have limited the length-to-thickness ratio of these devices, leaving a largely unexplored regime in nano-engineerin... | centimeter-scale nanomechanical resonators with low dissipation |
the current gravitational wave (gw) detectors have successfully observed many binary compact objects, and the third generation ground-based gw detectors such as einstein telescope and space-borne detectors such as lisa will start their gw observation in a decade. ahead of the arrival of this new era, we perform a binar... | on the population iii binary black hole mergers with intermediate mass black holes: dependence on common envelope parameter |
gravitational-wave signals from compact binary coalescences are most effectively identified by matched filter searches. these searches match the data against a pregenerated bank of gravitational-wave templates. currently, all modeled gravitational-wave searches use templates that restrict the component spins to be alig... | search technique to observe precessing compact binary mergers in the advanced detector era |
in the ground-based gravitational wave detector, the laser phase noise can be cancelled out by virtue of the equal-arm configuration in a large-scale michelson interferometer. however, this is not the case for the space-based gravitational wave detector, because it is difficult to ensure that the two arms are always th... | time delay interferometry using laser frequency comb as the direct signal source |
multiband observations of coalescing stellar-mass black holes binaries could deliver valuable information on the formation of such sources and potential deviations from general relativity. some of these binaries might be first detected by the space-based detector lisa and, then, several years later, observed with groun... | detectability and parameter estimation of gwtc-3 events with lisa |
the second generation of interferometric gravitational wave detectors are quickly approaching their design sensitivity. for the first time these detectors will become limited by quantum backaction noise. several backaction evasion techniques have been proposed to further increase the detector sensitivity. since most pr... | local-oscillator noise coupling in balanced homodyne readout for advanced gravitational wave detectors |
during the first observing run of ligo, two gravitational wave events and one lower-significance trigger (lvt151012) were reported by the ligo/virgo collaboration. at the time of lvt151012, the international gamma-ray astrophysics laboratory (integral) was pointing at a region of the sky coincident with the high locali... | integral ibis, spi, and jem-x observations of lvt151012 |
the jet opening angle and inclination of gw170817 - the first detected binary neutron star merger - were vital to understand its energetics, relation to short gamma-ray bursts, and refinement of the standard siren-based determination of the hubble constant, h0. these basic quantities were determined through a combinati... | constraining properties of neutron star merger outflows with radio observations |
in our previous work, we investigated the effect of the hypothetical reflecting boundary near the black hole event horizon on the waveform from extreme mass-ratio inspirals (emris). even if the reflection efficiency is not extremely high, we found that a significant modification of the waveform can be expected. then, t... | efficient search method of anomalous reflection by the central object in an extreme mass-ratio inspiral system by future space gravitational wave detectors |
the matched filtering paradigm is the mainstay of gravitational wave (gw) searches from astrophysical coalescing compact binaries (e.g., binary black holes, binary neutron star, neutron star, and black hole pair). the compact binary coalescence (cbc) search pipelines (e.g. gstlal, pycbc) perform the matched filter betw... | employing deep learning for detection of gravitational waves from compact binary coalescences |
we consider the effects of the mass of graviton on both the waveform of gravitational waves (gws) and the antenna response to gws. we determine that the effect on the response function is negligible for small mass. using the fisher matrix method, we perform parameter estimations with space-based gw detectors for massiv... | constraint on the mass of graviton with gravitational waves |
we derive some of the central equations governing quantum fluctuations in gravitational waves, making use of general relativity as a sensible effective quantum theory at large distances. we begin with a review of classical gravitational waves in general relativity, including the energy in each mode. we then form the qu... | bound on quantum fluctuations in gravitational waves from ligo-virgo |
proposed future gravitational wave detectors place high demands on their prestabilized laser system. we present a prototype for such a prestabilized laser system at 1550 nm wavelength with frequency and power stabilizations optimized for the needs of gravitational wave detectors. a power stabilization with shot noise l... | stabilized laser system at 1550 nm wavelength for future gravitational-wave detectors |
space-based gravitational-wave detectors consist of a triangle of three spacecraft, which makes it possible to detect polarization modes of gravitational waves due to the motion of the detectors in space. in this paper we explore the ability of taiji to detect the polarization modes in the parametrized post-einsteinian... | constraining gravitational-wave polarizations with taiji |
recent gravitational wave observations have allowed stringent new constraints on modifications to general relativity (gr) in the extreme gravity regime. although these observations were consistent with compact binaries with no orbital eccentricity, gravitational waves emitted in mildly eccentric binaries may be observe... | improved constraints on modified gravity with eccentric gravitational waves |
we reanalyze the detection possibilities for gravitational waves arising from cosmological first order phase transitions. we discuss the stochastic gravitational wave background corresponding to the three expected scenarios of phase transition dynamics. we then perform an analysis on the detection possibilities for eac... | multiwavelength observations of cosmological phase transitions using lisa and cosmic explorer |
using neural networks, we integrate the ability to account for doppler smearing due to a pulsar's orbital motion with the pulsar population synthesis package psrpoppy to develop accurate modeling of the observed binary pulsar population. as a first application, we show that binary neutron star systems where the two com... | on the detectability of ultracompact binary pulsar systems |
the laser interferometer space antenna is a foreseen space-based gravitational wave detector, which aims to detect 10-20 strains in the frequency range from 0.1 mhz to 1 hz. it is a triangular constellation of three spacecraft, with equal sides of m, where every spacecraft hosts a pair of telescopes that simultaneously... | coupling of wavefront errors and pointing jitter in the lisa interferometer: misalignment of the interfering wavefronts |
the matter-wave laser interferometer gravitation antenna, miga, will be a hybrid instrument composed of a network of atom interferometers horizontally aligned and interrogated by the resonant field of an optical cavity. this detector will provide measurements of sub hertz variations of the gravitational strain tensor. ... | miga: combining laser and matter wave interferometry for mass distribution monitoring and advanced geodesy |
we present prospects for discovering dark matter scattering in gravitational wave detectors. the focus of this work is on light, particle dark matter with masses below 1 gev/c2 . we investigate how a potential signal compares to typical backgrounds like thermal and quantum noise, first in a simple toy model and then us... | light dark matter scattering in gravitational wave detectors |
laser gyroscopes making use of the sagnac effect have been used as highly accurate rotation sensors for many years. first used in aerospace and defense applications, these devices have more recently been used for precision seismology and in other research settings. in particular, mid-sized (∼1 m-scale) laser gyros have... | passive, free-space heterodyne laser gyroscope |
in this paper, we investigate the potential of dark sirens by the space-borne atom interferometric gravitational-wave detectors to probe the hubble constant. in the mid-frequency band, the sources live a long time. the motion of a detector around the sun as well as in earth orbit would induce large doppler and reorient... | space-borne atom interferometric gravitational wave detections. part ii. dark sirens and finding the one |
gravitational-wave (gw) detectors that monitor fluctuations in the separation between inertial test masses (tms) are sensitive to new forces acting on those tms. ultralight dark-photon dark matter (dpdm) coupled to u (1 )b or u (1 )b-l charges supplies one such force that oscillates with a frequency set by the dpdm mas... | asteroids for ultralight dark-photon dark-matter detection |
the detection of gravitational waves (gws) by ground-based laser interferometer gw observatories (ligo/virgo) reveals a population of stellar binary black holes (sbbhs) with (total) masses up to ~ 150m ⊙, which are potential sources for space-based gw detectors, such as lisa and taiji. in this paper, we investigate in ... | on detecting stellar binary black holes via the lisa-taiji network |
the ligo-virgo-kagra (lvk) network of gravitational-wave (gw) detectors have observed many tens of compact binary mergers to date. transient, non-gaussian noise excursions, known as 'glitches', can impact signal detection in various ways. they can imitate true signals as well as reduce the confidence of real signals. i... | waves in a forest: a random forest classifier to distinguish between gravitational waves and detector glitches |
proposed near-future upgrades of the current advanced interferometric gravitational wave detectors include the usage of frequency dependent squeezed light to reduce the current sensitivity-limiting quantum noise. we quantify and describe the degradation effects that spatial mode-mismatches between optical resonators ha... | multi-spatial-mode effects in squeezed-light-enhanced interferometric gravitational wave detectors |
gravitational wave high-energy electromagnetic counterpart all-sky monitor (gecam) is a pair of small satellites designed to monitor the gamma-ray bursts (grbs), some of them are possibly associated with gravitational wave events (gwe). each satellite includes twenty-five gamma-ray detectors (grds) and eight charged pa... | ground electron calibration of charged particle detectors onboard gecam satellite |
we build the fermi frame associated to the world-line of a reference observer, arbitrary moving in a given space-time, and we show that local measurements can be described in terms of a gravito-electromagnetic analogy, where the gravito-electric and gravito-magnetic fields are related to the non inertial features of th... | gravito-electromagnetic approach for the space-time of a plane gravitational wave |
after first reviewing the gravitational wave (gw) spectral classification. we discuss the sensitivities of gw detection in space aimed at low frequency band (100 nhz-100 mhz) and middle frequency band (100 mhz-10 hz). the science goals are to detect gws from (i) supermassive black holes; (ii) extreme-mass-ratio black h... | gravitational wave (gw) classification, space gw detection sensitivities and amigo (astrodynamical middle-frequency interferometric gw observatory) |
pulsars are natural cosmic clocks. on long timescales they rival the precision of terrestrial atomic clocks. using a technique called pulsar timing, the exact measurement of pulse arrival times allows a number of applications, ranging from testing theories of gravity to detecting gravitational waves. also an external r... | pulsar timing and its application for navigation and gravitational wave detection |
in our previous article we have explored the continuous gravitational waves (gws) emitted from rotating magnetized white dwarfs (wds) and their detectability by the planned gw detectors such as laser interferometer space antenna (lisa), deci-hertz interferometer gravitational wave observatory (decigo), and big bang obs... | gravitational waves from sgrs and axps as fast-spinning white dwarfs |
a light scalar dark matter (dm) is allowed in a wide range of the 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... | a new probe of dark matter-induced fifth force with neutron star inspirals |
a supermassive binary black-hole candidate sdss j1430+2303 reported recently motivates us to investigate an imminent binary of supermassive black holes as potential gravitational wave source, and the radiated gravitational waves at the end of the merger are shown to be in the band of space-borne detectors. we provide a... | exploring the nature of black hole and gravity with an imminent merging binary of supermassive black holes |
in principle, gravitational waves could exist at any frequency. recently, the ligo-virgo collaboration detected gravitational waves (gws) by probing their mechanical responses with laser interferometers. the detected gws are in the intermediate-frequency band, i.e., gw150914: 35-250 hz; gw151226: 35-450 hz; gw170104: 3... | electromagnetic response of gravitational waves passing through an alternating magnetic field: a scheme to probe high-frequency gravitational waves |
hermes (high energy rapid modular ensemble of satellites) is a space-borne mission based on a constellation of nano-satellites flying in a low-earth orbit (leo). the six 3u cubesat buses host new miniaturized instruments hosting a hybrid silicon drift detector/gagg:ce scintillator photodetector system sensitive to x-ra... | design, integration, and test of the scientific payloads on-board the hermes constellation and the spirit mission |
the planned laser interferometric space antenna (lisa) will be able to detect gravitational waves (gws) from intermediate mass binary black holes (imbbhs) in the mass range ∼102- 104 m⊙ up to a redshift z ∼20 . modulation effects due to lisa's orbital motion around the sun facilitate precise premerger localization of t... | premerger localization of intermediate mass binary black holes with lisa and prospects of joint observations with athena and lsst |
both the fluctuations of the onboard lasers and clocks in a space-based gravitational wave interferometer can significantly decrease the sensitivity of the detector to an unacceptable performance level. implementing a self-referenced optical frequency comb (ofc) driven by the onboard laser can establish the relationshi... | modified time-delay interferometry with an optical frequency comb |
the deci-hertz interferometer gravitational-wave observatory (decigo) is a space gravitational wave (gw) detector. decigo was originally designed to be sensitive enough to observe primordial gw background (pgw). however, due to the lowered upper limit of the pgw by the planck observation, further improvement of the tar... | optimization of design parameters for gravitational wave detector decigo including fundamental noises |
heterodyne laser phase measurements in a space-based gravitational wave interferometer are degraded by the phase fluctuations of the onboard clocks, resulting in unacceptable sensitivity performance levels of the interferometric data. in order to calibrate out the clock phase noises, it has previously been suggested th... | time-delay interferometry with optical frequency comb |
isolated nonaxisymmetric rotating neutron stars producing continuous-gravitational-wave signals may undergo occasional spin-up events known as glitches. if unmodeled by a search, these glitches can result in continuous wave signals being missed or misidentified as detector artifacts. we outline a semicoherent glitch-ro... | a semicoherent glitch-robust continuous-gravitational-wave search method |
the superposition of many astrophysical gravitational waves (gw) signals below typical detection thresholds baths detectors in a stochastic gravitational wave background (sgwb). in this work we present a fourier space approach to compute the frequency-domain distribution of stochastic gravitational wave backgrounds pro... | frequency-domain distribution of astrophysical gravitational-wave backgrounds |
inspirals of rotating stellar-mass compact objects into massive black holes are influenced by the spin-curvature coupling, which drives the compact body away from geodesic motion due to its rotation. i formulate the hamilton-jacobi equation for a spinning test body orbiting a kerr black hole, solve it to linear order i... | spin-perturbed orbits near black holes |
searching for gravitational waves from compact binary coalescence (cbc) is performed by matched filtering the observed strain data from gravitational-wave observatories against a discrete set of waveform templates designed to accurately approximate the expected gravitational-wave signal, and are chosen to efficiently c... | hierarchical approach to matched filtering using a reduced basis |
the data produced by the future space-based millihertz gravitational-wave detector lisa will require nontrivial pre-processing, which might affect the science results. it is crucial to demonstrate the feasibility of such processing algorithms and assess their performance and impact on the science. we are building an en... | end-to-end simulation and analysis pipeline for lisa |
scattering events around a supermassive black hole will occasionally toss a stellar-mass compact object into an orbit around the supermassive black hole, beginning an extreme mass ratio inspiral. the early stages of such a highly eccentric orbit will not produce detectable gravitational waves as the source will only be... | gravitational wave peeps from emris and their implication for lisa signal confusion noise |
the method of time-delay interferometry (tdi) is proposed to cancel the laser noise in space-borne gravitational-wave detectors. among all different tdi combinations, the most commonly used ones are the orthogonal channels a, e, and t, where a and e are signal-sensitive and t is signal-insensitive. meanwhile, for the d... | impact of combinations of time-delay interferometry channels on stochastic gravitational wave background detection |
we evaluate the prospects for radio follow-up of the double neutron stars (dnss) in the galactic disk that could be detected through future space-borne gravitational wave (gw) detectors. we first simulate the dns population in the galactic disk that is accessible to space-borne gw detectors according to the merger rate... | multimessenger observations of double neutron stars in the galactic disk with gravitational and radio waves |
the pressure is on to choose between several proposals for space-based detectors. | chinese gravitational-wave hunt hits crunch time |
compact objects inspiraling into supermassive black holes, known as extreme-mass-ratio inspirals, are an important source for future space-borne gravitational-wave detectors. when constructing waveform templates, usually the adiabatic approximation is employed to treat the compact object as a test particle for a short ... | geometrized effective-one-body formalism for extreme-mass-ratio limits: generic orbits |
in view of the new recent observation and measurement of the rotating and highly magnetized white dwarf ar scorpii, we determine bounds of its moment of inertia, magnetic fields and radius. moreover, we investigate the possibility of fast rotating and/or magnetized white dwarfs to be sources of detectable gravitational... | ar scorpii and possible gravitational wave radiation from pulsar white dwarfs |
hubble tension is one of the most important problems in cosmology. although the local measurements on the hubble constant with type ia supernovae (sne ia) are independent of cosmological models, they suffer the problem of zero-point calibration of the luminosity distance. the observations of gravitational waves (gws) w... | supernova calibration by gravitational waves |
gravitational wave observations offer unique opportunities to probe gravity in the strong and dynamical regime, which was difficult to access previously. we here review two theory-agnostic ways to carry out tests of general relativity with gravitational waves, namely (i) parameterized waveform tests and (ii) consistenc... | parameterized and consistency tests of gravity with gravitationalwaves: current and future |
the lambda-cold dark matter model explains cosmological observations most accurately till date. however, it is still plagued with various shortcomings at galactic scales. models of dark matter such as superfluid dark matter, bose-einstein condensate(bec) dark matter and fuzzy dark matter have been proposed to overcome ... | prospects of probing dark matter condensates with gravitational waves |
we have demonstrated the viability of using the laser ranging interferometer on the gravity recovery and climate experiment follow-on (grace-fo) space mission to test key aspects of the interspacecraft interferometry proposed for detecting gravitational waves. the laser ranging interferometer on grace-fo will be the fi... | tone-assisted time delay interferometry on grace follow-on |
the detection of gravitational waves from the coalescences of binary compact stars by current interferometry experiments has opened up a new era of gravitational-wave astrophysics and cosmology. the search for a stochastic gravitational-wave background is underway by correlating signals from a pair of detectors in the ... | overlap reduction functions for a polarized stochastic gravitational-wave background in the einstein telescope-cosmic explorer and the lisa-taiji networks |
the paper is a sequel to our previous work [zhang et al. phys. rev. d 103, 062001 (2021), 10.1103/physrevd.103.062001]. for proposed geocentric space-based gravitational wave detectors such as tianqin, glisa, and gadfli, the gravity-field disturbances, i.e., the so-called "orbital noise", from the earth-moon system on ... | effect of earth-moon's gravity on tianqin's range acceleration noise. ii. impact of orbit selection |
the new technique of measuring frequency by optical lattice clocks now approaches to the relative precision of (δf/f) = o(10-18). we propose to place such precise clocks in space and to use doppler tracking method for detecting low-frequency gravitational wave below 1hz. our idea is to locate three spacecrafts at one a... | ino: interplanetary network of optical lattice clocks |
the present day gravitational wave (gw) detectors strive to detect the length variation , which, owing to the smallness of the metric perturbation ∼h, is an extremely small length -10-21 m. the recently proposed noncommutative structure of space has a characteristic length-scale which has an estimated upper-bound in si... | footprint of spatial noncommutativity in resonant detectors of gravitational wave |
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