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we study the advantages of the coexistence of future ground- and space-based gravitational-wave detectors in estimating the parameters of a binary coalescence. space measurements will act as a precursor to ground measurements. also, since space measurements will provide much better localization information on the sourc... | synergy between ground- and space-based gravitational-wave detectors for estimation of binary coalescence parameters |
time-delay interferometry (tdi) is a crucial technology for space-based gravitational wave detectors. previous studies have identified the optimal tdi configuration for the first-generation. in this research, we used an algebraic approach theory to describe the tdi space and employed a method to maximize the signal-to-... | optimal tdi2.0 of sensitive curve for main space gw detector |
the laser interferometer space antenna (lisa) is a future space-based interferometric gravitational-wave detector consisting of three spacecraft in a triangular configuration. the interferometric measurements of path length changes between satellites will be performed on optical benches in the satellites. angular misal... | design and construction of an optical test bed for lisa imaging systems and tilt-to-length coupling |
it was found that dark matter (dm) in an intermediate-mass-ratio-inspiral (imri) system has a significant enhancement effect on the orbital eccentricity of a stellar massive compact object, such as a black hole (bh), which may be tested by space-based gravitational wave (gw) detectors, including lisa, taiji, and tianqi... | the eccentricity enhancement effect of intermediate-mass-ratio-inspirals: dark matter and black hole mass |
the joint detection of gravitational wave (gw) signals by a network of instruments will increase the detecting ability of faint and far gw signals with higher signal-to-noise ratios (snrs), which could improve the ability of detecting the lensed gws as well, especially for the third-generation (3g) detectors, e.g. eins... | identifying strongly lensed gravitational waves with the third-generation detectors |
observations of binaries containing pairs of neutron stars using the upcoming space-based gravitational wave observatory, lisa, have the potential to improve our understanding of neutron star physics and binary evolution. in this work, we assess the effect of changing the model of the milky way's kinematics and star fo... | the effects of galactic model uncertainties on lisa observations of double neutron stars |
we study the cross-correlation between the stochastic gravitational-wave background (sgwb) generated by binary black hole mergers across the universe and the distribution of galaxies across the sky. we use the anisotropic sgwb measurement obtained using data from the third observing run (o3) of advanced ligo detectors ... | measurement of the cross-correlation angular power spectrum between the stochastic gravitational wave background and galaxy overdensity |
deep ultraviolet (duv) light sources are used to neutralise isolated test masses in highly sensitive space-based gravitational experiments. an example is the lisa pathfinder charge management system, which uses low-pressure mercury lamps. a future gravitational-wave observatory such as elisa will use uv light-emitting ... | characterising and testing deep uv leds for use in space applications |
a gravitational wave background (gwb) is expected in the universe from the superposition of a large number of unresolved astrophysical sources and phenomena in the early universe. each component of the background (e.g., from primordial metric perturbations, binary neutron stars, milli-second pulsars etc.) has its own s... | component separation of a isotropic gravitational wave background |
the uv-led mission demonstrates the precise control of the potential of electrically isolated test masses. test mass charge control is essential for the operation of space accelerometers and drag-free sensors which are at the core of geodesy, aeronomy and precision navigation missions as well as gravitational wave expe... | ground testing and flight demonstration of charge management of insulated test masses using uv-led electron photoemission |
the environment surrounding supermassive black holes (smbhs) in galactic nuclei (gns) is expected to harbour stellar-mass binary black hole (bbh) populations. these binaries were suggested to form a hierarchical triple system with the smbh, and gravitational perturbations from the smbh can enhance the mergers of bbhs t... | parameter distributions of binary black hole mergers near supermassive black holes as seen by advanced gravitational wave detectors |
we consider the extension of the standard model (sm) with scalar leptoquarks in su(2) singlet, doublet and triplet representations. through the coupling between leptoquark and the sm higgs field, the electroweak phase transition (ewpt) can turn into first-order and consequently produce gravitational wave signals. we co... | gravitational wave signals from leptoquark-induced first-order electroweak phase transitions |
we present a concept of a mirror for application in high-reflectivity low-noise instruments such as interferometers. the concept is based on an etalon with a metasurface (meta-etalon) on the front and a conventional multilayer stack on the rear surface. the etalon in combination with the metasurface enables a dedicated... | highly reflective low-noise etalon-based meta-mirror |
we investigate the gravitational wave (gw) signal generated by a population of double neutron-star (dns) binaries with eccentric orbits caused by kicks during supernova collapse and binary evolution. the dns population of a standard milky way-type galaxy has been studied as a function of star formation history, initial... | the gravitational-wave signal generated by a galactic population of double neutron-star binaries |
multilevel quantum protocols may potentially supersede standard quantum optical polarization-encoded protocols in terms of amount of information transmission and security. however, for free-space telecommunications, we do not have tools for limiting loss due to diffraction and perturbations, as, for example, turbulence... | squeezing of x waves with orbital angular momentum |
time delay interferometry (tdi) is often utilized in the data preprocessing of space-based gravitational wave detectors, primarily for suppressing laser frequency noise. about 20 years ago, assuming arm lengths remain constant over time, researchers presented comprehensive mathematical descriptions for the first-genera... | revisitation of algebraic approach for time delay interferometry |
we suggest a crucial direct-observational test for measuring distinction between the standard λcdm model and recently proposed phantom dark energy positive curvature cosmological model. the test is based on the fundamental distance-flux-redshift relation for general friedmann models. it does not depend on the cmbr data... | a crucial test of the phantom closed cosmological model |
as engineered systems grow in complexity, there is an increasing need for automatic methods that can detect, diagnose, and even correct transient anomalies that inevitably arise and can be difficult or impossible to diagnose and fix manually. among the most sensitive and complex systems of our civilization are the dete... | detecting and diagnosing terrestrial gravitational-wave mimics through feature learning |
recent observations discovered that some repeating fast radio bursts (frbs) show a large value and complex variations of faraday rotation measures (rms). the binary systems containing a supermassive black hole and a neutron star can be used to explain such rm variations. meanwhile, such systems produce low-frequency gr... | fast radio bursts: electromagnetic counterparts to extreme mass-ratio inspirals |
the dynamical tide can play an important role in the orbital motion of close eccentric double white dwarf binaries. as the launching of the space-based gravitational-wave detector, the laser interferometer space antenna (lisa), is just around the corner, detection of gravitational wave signals from such systems is anti... | periastron precession effect of f -mode dynamical tides on gravitational waves from eccentric double white dwarfs |
we compute the expected response of detector arms of gravitational wave observatories to polymerized gravitational waves. the mathematical and theoretical features of these waves were discussed in our previous work. in the present manuscript, we find both perturbative analytical, and full nonperturbative numerical solu... | what do gravitational wave detectors say about polymer quantum effects? |
we present the predictions with standard sirens at gravitational-wave detectors, such as the laser interferometer space antenna (lisa) and the einstein telescope (et), for interacting dark energy theories. we focus on four models characterized by couplings between the dark energy field and the dark matter fluid arising... | forecasts on interacting dark energy with standard sirens |
a confident discovery of physics beyond what has been consistently modeled from gravitational wave (gw) data requires a technique that can distinguish between noise artifacts and unmodeled signatures while also shedding light on the underlying physics. we propose a new data analysis method, score (structured correlated... | new framework to study unmodeled physics from gravitational wave data |
the mass and spin properties of binary black holes (bbhs) inferred from their gravitational-wave signatures reveal important clues about how these systems form. bbhs originating from isolated binary evolution are expected to have spins preferentially aligned with their orbital angular momentum, whereas there is no such... | prospects for measuring off-axis spins of binary black holes with plus-era gravitational-wave detectors |
on the basis of gwtc-3, we discuss the detection prospect of extragalactic binary black holes (bbhs) by space gravitational-wave interferometers, mainly targeting bbhs in the range of chirp masses with abundant detections. in particular, we directly incorporate the chirp mass distribution of the 62 bbhs detected so far... | how many extragalactic stellar mass binary black holes will be detected by space gravitational-wave interferometers? |
core-collapse supernovae (cc-sne) are factories of neutron stars and stellar-mass black holes. sne ib/c stand out as potentially originating in relatively compact stellar binaries and they have a branching ratio of about 1% into long gamma-ray bursts. the most energetic events probably derive from central engines harbo... | directed searches for broadband extended gravitational wave emission in nearby energetic core-collapse supernovae |
detection of many compact binary coalescences (cbcs) is one of the primary goals of the present and future ground-based gravitational-wave (gw) detectors. while increasing the detectors' sensitivities will be crucial in achieving this, efficient data analysis strategies can play a vital role. with given computational p... | hierarchical search for compact binary coalescences in the advanced ligo's first two observing runs |
the gravitational-wave (gw) inspirals of stellar-mass compact objects on to a supermassive black hole (smbh), are some of the most promising gw sources detectable by next-generation space-born gw-detectors. the rates and characteristics of such extreme mass ratio inspirals (emris) sources are highly uncertain. they are... | extreme mass-ratio gravitational-wave sources: mass segregation and post binary tidal-disruption captures |
in this paper we present a study of some relevant steps of the hierarchical frequency-hough (fh) pipeline, used within the ligo and virgo collaborations for wide-parameter space searches of continuous gravitational waves (cws) emitted, for instance, by spinning neutron stars (nss). because of their weak expected amplit... | impact of signal clusters in wide-band searches for continuous gravitational waves |
space-borne gravitational wave detectors, such as (e)lisa, are designed to operate in the low-frequency band (mhz to hz), where there is a variety of gravitational wave sources of great scientific value [arxiv:1305.5720 and s. babak et al., classical quantum gravity 28, 114001 (2011)]. to achieve the extraordinary sens... | first stage of lisa data processing. ii. alternative filtering dynamic models for lisa |
the heisenberg uncertainty principle is modified by the introduction of an observer-independent minimal length. in this work, we have considered the resonant gravitational wave detector in the modified uncertainty principle framework, where we have used the position momentum uncertainty relation with a quadratic order ... | path integral action for a resonant detector of gravitational waves in the generalized uncertainty principle framework |
a variety of future space missions rely on the availability of high-performance optical clocks with applications in fundamental physics, geoscience, earth observation and navigation and ranging. examples are the gravitational wave detector elisa (evolved laser interferometer space antenna), the earth gravity mission ng... | high-performance optical frequency references for space |
since gravity changes propagate at the speed of light, gravity perturbations induced by earthquake deformation have the potential to enable faster alerts than the current earthquake early warning systems based on seismic waves. additionally, for large earthquakes (mw > 8), gravity signals may allow for a more reliab... | early earthquake detection capabilities of different types of future-generation gravity gradiometers |
we present a machine learning (ml) based method for automated detection of gamma-ray burst (grb) candidate events in the range 60-250 kev from the astrosat cadmium zinc telluride imager data. we use density-based spatial clustering to detect excess power and carry out an unsupervised hierarchical clustering across all ... | a machine learning approach for grb detection in astrosat czti data |
the gravitational wave highly energetic electromagnetic counterpart all-sky monitor (gecam) is dedicated to detecting gravitational wave gamma-ray bursts. it is capable of all-sky monitoring over and discovering gamma-ray bursts and new radiation phenomena. gecam consists of two microsatellites, each equipped with 8 ch... | the design and performance of charged particle detector onboard the gecam mission |
an extreme-mass-ratio system composed of a white dwarf (wd) and a massive black hole can be observed by low-frequency gravitational wave detectors, such as the laser interferometer space antenna (lisa). when the mass of the black hole is around 104 ∼ 105 m ⊙, the wd will be disrupted by the tidal interaction at the fin... | determining the nature of white dwarfs from low-frequency gravitational waves |
our existence in the universe resulted from a rare combination of circumstances. the same must hold for any highly developed extraterrestrial civilisation, and if they have ever existed in the milky way, they would likely be scattered over large distances in space and time. however, all technologically advanced species... | a galactic centre gravitational-wave messenger |
in massive scalar-tensor gravity, core-collapse supernovae are strong sources of scalar-polarized gravitational waves. these can be detectable out to large distances. the dispersive nature of the propagation of waves in the massive scalar field implies that the gravitational wave signals are long-lived, and many such s... | stochastic gravitational wave background from supernovae in massive scalar-tensor gravity |
the gravitational wave high-energy electromagnetic counterpart all-sky monitor (gecam) consists of two small satellites operating in the same earth orbit with opposite phases. its scientific goal is to monitor the electromagnetic counterparts associated with gravitational wave events (gwe) and other cosmic high energy ... | on-ground calibration of low gain response for gamma-ray detectors onboard the gecam satellite |
kilonovae represent an important electromagnetic counterpart for compact binary mergers, which could become the most commonly detected gravitational-wave (gw) source. follow-up observations of kilonovae, triggered by gw events, are nevertheless difficult due to poor localization by gw detectors and due to their faint n... | james webb space telescope can detect kilonovae in gravitational wave follow-up search |
the observation of gw150914 gave a new independent measurement of the luminosity distance of a gravitational wave event. in this paper, we constrain the anisotropy of the universe by using gravitational wave events. we simulate hundreds of events of binary neutron star merger that may be observed by the einstein telesc... | the prospects of using gravitational waves for constraining the anisotropy of the universe |
gravitational waves (gws) encode important information about the mass of the source. for binary black holes (bbhs), the templates that are used to retrieve the masses normally are developed under the assumption of a vacuum environment. however, theories suggest that some bbhs form in gas-rich environments. here, we stu... | retrieving the true masses of gravitational wave sources |
the search for continuous gravitational waves in a wide parameter space at a fixed computing cost is most efficiently done with semicoherent methods, e.g., stackslide, due to the prohibitive computing cost of the fully coherent search strategies. prix and shaltev [phys. rev. d 85, 084010 (2012)] have developed a semian... | optimizing the stackslide setup and data selection for continuous-gravitational-wave searches in realistic detector data |
this study presents a background estimation for the cubesats applied for measuring and localising transients (camelot), which is a proposed fleet of nanosatellites for the all‑sky monitoring and timing‑based localization of gamma ray transients with precise localization capability at low earth orbits. camelot will allo... | estimation of the detected background by the future gamma ray transient mission camelot |
the accurate sky localization of gravitational wave (gw) sources is an important scientific goal for space-based gw detectors. due to the effects of gravity on three spacecrafts, it is hard to maintain the equality of the arm length, so the time-delay interferometry (tdi) method is needed to cancel out the laser freque... | sky localization of space-based detectors with time-delay interferometry |
context. galactic binaries account for the loudest combined continuous gravitational wave signal in the laser interferometer space antenna (lisa) band, which spans a frequency range of 0.1 mhz-1 hz.aims: a superposition of low frequency galactic and extragalactic signals and instrument noise comprise the lisa data stre... | the lisa data challenge radler analysis and time-dependent ultra-compact binary catalogues |
we present here the proposal to use the lisa interferometer for detecting the gravito-magnetic field due to the rotation of the milky way, including the contribution given by the dark matter halo. the galactic signal would be superposed to the gravitomagnetic field of the sun. the technique to be used is based on the a... | dark gravitomagnetism with lisa and gravitational waves space detectors |
parametric transducers can work below the quantum limit of sensitivity for resonant mass gravitational wave detectors. this makes them a promising alternative for electromechanical transductance for such detectors. these transducers consist of a reentrant superconducting niobium cavity coupled to a mass-spring system w... | high sensitivity niobium parametric transducer for the mario schenberg gravitational wave detector |
the sensitivity of ground-based gravitational-wave (gw) detectors will be improved in the future via the injection of frequency-dependent squeezed vacuum. the achievable improvement is ultimately limited by losses of the interferometer electromagnetic field that carries the gw signal. the analysis and reduction of opti... | analysis and visualization of the output mode-matching requirements for squeezing in advanced ligo and future gravitational wave detectors |
space-based gravitational wave (gw) detection at low frequencies is of great scientific significance and has received extensive attention in recent years. this work designs and optimizes the low-energy transfer of the heliocentric formation of gw detectors, which starts from a geosynchronous transfer orbit and targets ... | low-energy transfer design of heliocentric formation using lunar swingby on the example of lisa |
it has been suggested by weinberg et al. that an instability due to the nonlinear coupling of a neutron star's tide to its p- and g-modes could affect the gravitational-wave phase evolution of a neutron star binary. weinberg suggests that this instability can turn on as the gravitational waves pass through the sensitiv... | constraints on nonlinear tides due to p-g mode coupling from the neutron star merger gw170817 |
the accurate localization of gamma-ray bursts (grbs) remains a crucial task. historically, improved localizations have led to the discovery of afterglow emission and the realization of their cosmological distribution via redshift measurements; however, a more recent requirement comes with the potential of studying the ... | a proposed network of gamma-ray burst detectors on the global navigation satellite system galileo g2 |
a scalar charged particle moving in a curved background spacetime will emit a field affecting its own motion; the resolving of this resulting motion is often referred to as the self-force problem. this also serves as a toy model for the astrophysically interesting compact-body binaries, extreme mass ratio inspirals, ta... | regularization of a scalar charged particle for generic orbits in kerr spacetime |
amigo-the astrodynamical middle-frequency interferometric gravitation-wave (gw) observatory is a first-generation mid-frequency gw mission bridging the sensitivity gap between the high-frequency gw detectors and low-frequency space gw detectors. in our previous works, we have obtained appropriate heliocentric orbit for... | core noise and gw sensitivities of amigo |
in the context of simulating precision laser interferometers, we use several examples to compare two wavefront decomposition methods—the mode expansion method (mem) and the gaussian beam decomposition (gbd) method—for their precision and applicability. to assess the performance of these methods, we define different typ... | method comparison for simulating non-gaussian beams and diffraction for precision interferometry |
in a recent paper we described a novel approach to the detection and parameter estimation of a non-gaussian stochastic background of gravitational waves. in this work we propose an improved version of the detection procedure, preserving robustness against imperfect noise knowledge at no cost of detection performance; i... | improved detection statistics for non-gaussian gravitational wave stochastic backgrounds |
the current design of space-based gravitational wave detectors utilizes heterodyne laser interferometry in intersatellite science measurements. frequency variations of the heterodyne beat notes are predominantly caused by the doppler effect from relative satellite motion along lines of sight. generally considered to be... | doppler effect in tianqin time-delay interferometry |
gravitational wave detectors allow us to test general relativity and to study the internal structure and orbital dynamics of neutron stars and black holes in inspiralling binary systems with a potentially unlimited rigor. currently, analytic calculations of a gravitational wave signal emitted by inspiralling compact bi... | covariant equations of motion of extended bodies with arbitrary mass and spin multipoles |
we report the infrasonic performance of a fiber optic laser frequency reference with potential application to space-based gravitational wave detectors, such as the laser interferometer space antenna. we determine the optimum cross-over frequency between an optical frequency comb stabilized to a rubidium atomic referenc... | infrasonic performance of a passively stabilized, all-fiber, optical frequency reference |
the coalescence of a neutron star with a black hole is a primary science target of ground-based gravitational wave detectors. constraining or measuring the neutron star spin directly from gravitational wave observations requires knowledge of the dependence of the emission properties of these systems on the neutron star... | initial data for black hole-neutron star binaries, with rotating stars |
the new technique of measuring frequency by optical lattice clocks now approaches to the relative precision of $(\delta f/f)=o(10^{-18})$. we propose to place such precise clocks in space and to use doppler tracking method for detecting low-frequency gravitational wave below 1 hz. our idea is to locate three spacecraft... | ino: interplanetary network of optical lattice clocks |
a frequentist asymptotic expansion method for error estimation is employed for a network of gravitational wave detectors to assess the amount of information that can be extracted from gravitational wave observations. mathematically we derive lower bounds in the errors that any parameter estimator will have in the absen... | measuring violations of general relativity from single gravitational wave detection by nonspinning binary systems: higher-order asymptotic analysis |
we show that the loudest extreme mass-ratio inspirals (emris) detected by the future space-based gravitational wave detector lisa can be used as dark standard sirens, statistically matching their sky localisation region with mock galaxy catalogs. in these proceedings we focus on a realistic emri population scenario and... | gravitational wave cosmology with emris |
extreme-mass-ratio inspirals (emris) will be an important type of astrophysical source for future space-based gravitational-wave detectors. there is a trade-off between accuracy and computational speed for the emri waveform templates required in the analysis of data from these detectors. we discuss how the systematic e... | augmented kludge waveforms and gaussian process regression for emri data analysis |
close encounters between two initially unbound objects can result in a binary system if enough energy is released as gravitational waves (gws). we address the scenario in which such encounters occur in merging elliptical galaxies. there is evidence that elliptical galaxies can harbour intermediate-mass black holes (imb... | intermediate-mass ratio inspirals in merging elliptical galaxies |
two groups recently analysed the long-term orbital evolution of hm cancri, which is one of the most important verification binaries for the space gravitational wave detector lisa. by using the reported first and second derivatives of its orbital frequency f, we discuss potential tertiary effects on this binary. we foun... | potential tertiary effects on the lisa verification binary hm cancri |
the accuracy of bayesian inference can be negatively affected by the use of inaccurate forward models. in the case of gravitational-wave inference, accurate but computationally expensive waveform models are sometimes substituted with faster but approximate ones. the model error introduced by this substitution can be mi... | improving the scalability of the gaussian-process error marginalization in gravitational-wave inference |
the relic gravitational wave background due to tensor linear perturbations generated during higgs inflation is computed. both the standard model and a well-motivated phenomenological completion (that accounts for all the experimentally confirmed evidence of new physics) are considered. we focus on critical higgs inflat... | hearing higgs with gravitational wave detectors |
the lisa (laser interferometer space antenna) mission will observe in the low frequency band from $0.1 \mathrm{mhz}$ to $1 \mathrm{hz}$. in this regime, we expect the galactic binaries to be the dominant (by number) sources of gravitational waves signal. considering that galactic binaries are composed of the most magne... | impact of magnetism on gravitational waves emittedby compact galactic binaries in quasi-circular orbits |
from prolonged x-ray and optical data of the ultracompact binary hm cancri, two groups recently measured the second derivative of its orbital frequency. the space gravitational wave detector lisa will detect ∼104 galactic binaries, and their second frequency derivatives will be interesting observational targets for lis... | tracking the long-term gw phase evolution for hm cancri-like binaries with lisa |
it has been suggested that there is possibly a class of stellar-mass black holes (bhs) residing near (distance ≤103m ) the galactic center massive black hole, sgr a*. possible formation scenarios include the mass segregation of massive stellar-mass black holes and/or the disk migration if there was an active accretion ... | science potential for stellar-mass black holes as neighbors of sgr a* |
searches for gravitational waves (gws) from binary black holes using interferometric gw detectors require the construction of template banks for performing matched filtering while analyzing the data. placement of templates over the parameter space of binaries, as well as coincidence tests of gw triggers from multiple d... | template-space metric for searches for gravitational waves from the inspiral, merger, and ringdown of binary black holes |
quasiparticles in a bose-einstein condensate are sensitive to space-time distortions. gravitational waves can induce transformations on the state of phonons that can be observed through quantum state discrimination techniques. we show that this method is highly robust to thermal noise and depletion. we derive a bound o... | thermal noise in bec-phononic gravitational wave detectors |
atom-interferometric gravitational-wave (gw) space observatory (aigso) is a mission concept mainly aimed at the middle-frequency (0.1-10 hz) gw detection. aigso proposes to have three spacecrafts in linear formation with extension of 10km. the three spacecrafts need to maintain 5km + 5km constant arm-length formation. ... | orbit design for space atom-interferometer aigso |
in recent years, the drag-free satellites have been widely used for some fundamental physical experiments, such as checking short-range effects of general relativity, geopotential determination and the exploration of static ocean current. and the space-borne detector of gravitational waves is one of the important appli... | state and disturbance estimation for test masses of drag-free satellites based on self-recurrent wavelet neural network |
current gravitational-wave observations made by advanced ligo and advanced virgo use theoretical models that predict the signals generated by the coalescence of compact binaries. detections to date have been in regions of the parameter space where systematic modeling biases have been shown to be small. however, we must... | enhancing gravitational waveform models through dynamic calibration |
several sources of noise limit the sensitivity of current gravitational wave detectors. currently, dominant noise sources include quantum noise and thermal brownian noise, but future detectors will also be limited by other thermal noise channels. in this paper, we study a thermal noise source which is caused by spatial... | thermal charge carrier driven noise in transmissive semiconductor optics |
the response of a superconductor to a gravitational wave is shown to obey a london-like constituent equation. the cooper pairs are described by the ginzburg-landau free energy density embedded in curved spacetime. the lattice ions are modeled by quantum harmonic oscillators characterized by quasi-energy eigenvalues. th... | a new approach to detecting gravitational waves via the coupling of gravity to the zero-point energy of the phonon modes of a superconductor |
a dual-pass differential fabry-perot interferometer (dpdfpi) is one candidate of the interferometer configurations utilized in future fabry-perot type space gravitational wave antennas, such as deci-hertz interferometer gravitational wave observatory. in this paper, the working principle of the dpdfpi has been investig... | demonstration of a dual-pass differential fabry-perot interferometer for future interferometric space gravitational wave antennas |
future searches for a gravitational-wave background using earth-based gravitational-wave detectors might be impacted by correlated noise sources. a well-known example are the schumann resonances, which are extensively studied in the context of searches for a gravitational-wave background. earlier work has shown that a ... | gravitational-wave geodesy: defining false alarm probabilities with respect to correlated noise |
a vitally important requirement for detecting gravitational-wave (gw) signals from compact binary coalescences (cbcs) with high significance is the reduction of the false-alarm rate of the matched-filter statistic. the data from gw detectors contain transient noise artifacts, or glitches, which adversely affect the per... | optimal χ2 discriminator against modeled noise transients in interferometric data in searches for binary black-hole mergers |
accurate simulation of the propagation of light between the spacecraft of the laser interferometer space antenna (lisa) gravitational wave observatory will be a vital tool in determining the optical design of the telescopes used in the constellation. in this work, we examine the methods available for numerical simulati... | beam propagation simulations for lisa in the presence of telescope aberrations |
the grace mission that was launched in 2002 has impressively proven the feasibility of low-orbit satellite-to-satellite tracking for earth gravity observations. especially mass transport related to earth's hydrological system could be well resolved both spatially and temporally. this allows to study processes such as p... | measuring earth: current status of the grace follow-on laser ranging interferometer |
the first direct detection of gravitational waves brought not just another proof of einstein's theory of general relativity but also different questions about the discovery, and new branches of scientific studies have arisen. the advanced laser interferometer gravitational-wave observatory (ligo), the experiment that p... | comparison between t-sne and cosine similarity for ligo glitches analysis |
low-latency gravitational wave search pipelines such as gstlal take advantage of low-rank factorization of the template matrix via singular value decomposition (svd). with unprecedented improvements in detector bandwidth and sensitivity in advanced-ligo and virgo detectors, one expects several orders of magnitude incre... | random projections in gravitational-wave searches from compact binaries ii: efficient reconstruction of the detection statistic |
the future space-based gravitational wave detector laser interferometer space antenna (lisa) requires bidirectional exchange of light between its two optical benches on board of each of its three satellites. the current baseline foresees a polarization-maintaining single-mode fiber for this backlink connection. phase c... | sub-pm{{\\sqrt{hz}^{-1}}} non-reciprocal noise in the lisa backlink fiber |
in japan, not only the ground-based gravitational wave (gw) detector mission kagra but also the space gw detector mission decigo (deci-hertz interferometer gravitational wave observatory) and its milestone mission b-decigo have been promoted. the designed strain sensitivity of decigo and b-decigo are δl/ l < 10-23. ... | developments of high frequency and intensity stabilized lasers for space gravitational wave detector decigo/b-decigo |
we report the discovery of ogle-ucxb-01, a 12.8 minute variable object located in the central field of galactic bulge globular cluster djorg 2. the presence of frequent, short-duration brightenings at such an ultrashort period in long-term ogle photometry together with the blue color of the object in hubble space teles... | discovery of an outbursting 12.8 minute ultracompact x-ray binary |
gravitational wave searches to date have largely focused on nonprecessing systems. including precession effects greatly increases the number of templates to be searched over. this leads to a corresponding increase in the computational cost and can increase the false alarm rate of a realistic search. on the other hand, ... | stochastic template bank for gravitational wave searches for precessing neutron-star-black-hole coalescence events |
binary compact objects will be among the important sources for the future space-based gravitational wave detectors. such binary compact objects include stellar massive binary black hole, binary neutron star, binary white dwarf and mixture of these compact objects. regarding to the relatively low frequency, the gravitat... | post-keplerian waveform model for binary compact object as sources of space-based gravitational wave detector and its implications |
the laser interferometer space antenna (lisa) mission features a three-spacecraft long-arm constellation intended to detect gravitational wave sources in the low-frequency band up to 1 hz via laser interferometry. the paper presents an open-loop control strategy for point-ahead angle (paa) correction required to mainta... | lisa point-ahead angle control for optimal tilt-to-length noise estimation |
the proposed daksha mission comprises of a pair of highly sensitive space telescopes for detecting and characterizing high-energy transients, such as electromagnetic counterparts of gravitational wave events and gamma-ray bursts (grbs). along with spectral and timing analysis, daksha can also undertake polarization stu... | prospects of measuring gamma-ray burst polarization with the daksha mission |
we discuss motions of extended bodies in kerr spacetime by using mathisson-papapetrou-dixon equations. we firstly solve the conditions for circular orbits, and calculate the orbital frequency shift due to the mass quadrupoles. the results show that we need not consider the spin-induced quadrupoles in extreme-mass-ratio... | dynamics of extended bodies with spin-induced quadrupole in kerr spacetime: generic orbits |
the advent of space-based gravitational-wave detectors like the laser interferometer space antenna will allow us to observe signals, most of which are expected to be emitted by white-dwarf binaries. among these systems another kind of compact objects could be hidden, postulated by glendenning, kettner, and weber in 199... | unmasking strange dwarfs with gravitational-wave observations |
tianqin is a proposed space-borne gravitational wave observatory in high geocentric orbits, exposed to radiating heat sources in space. due to the stringent thermal stability requirements from the key payloads, the analysis of space thermal environment is of great importance. this paper studies the incident thermal rad... | thermal environment analysis for tianqin |
the gravitational wave (gw) is ripples in gravitational fields caused by the motion of mass such as inspiral and merger of blackhole binaries or explosion of super novae, which was predicted by a.einstein in his general theory of relativity. in japan, besides the ground-base gw detector, kagra, the space gravitational ... | space gravitational wave detector decigo/pre-decigo |
the high computational cost of wide-parameter-space searches for continuous gravitational waves (cws) significantly limits the achievable sensitivity. this challenge has motivated the exploration of alternative search methods, such as deep neural networks (dnns). previous attempts <xref ref-type="bibr" rid="c1 c2"&g... | novel neural-network architecture for continuous gravitational waves |
we present a novel way of wavefront sensing using a commercially available, continuous-wave time-of-flight camera with quarter video graphics array resolution. this cmos phase camera is capable of sensing externally modulated light sources with frequencies up to 100 mhz. the high-spatial-resolution of the sensor, combi... | high frame-rate phase camera for high-resolution wavefront sensing in gravitational-wave detectors |
coalescing supermassive black hole binaries (smbhbs) are the primary source candidates for low frequency gravitational wave (gw) detections, which could bring us deep insights into galaxy evolutions over cosmic time and violent processes of spacetime dynamics. promising candidates had been found based on optical and x-... | probing supermassive black hole binaries with orbital resonances of laser-ranged satellites |
the ground-based gravitational wave (gw) observatories discover a population of merging stellar binary black holes (bbhs), which are promising targets for multiband observations by the low-, middle-, and high-frequency gw detectors. in this paper, we investigate the multiband gw detections of bbhs and demonstrate the a... | multiband gravitational wave observations of stellar binary black holes at the low to middle and high frequencies |
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