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given the upgraded sensitivity of the ground-based gravitational-wave (gw) detectors, the upcoming fourth observing run (o4) by the ligo scientific, virgo, kagra collaboration is expected to have more gw detections from compact binary systems than ever. during this exciting era of the gw astronomy, the improvement of g... | the improvement of gstlal's ranking statistics toward the fourth observing run |
for a study of the european space agency esa, fraunhofer ilt developed and built single-frequency, linearly polarized, power-stabilized fiber amplifiers as elegant breadboard (ebb) with an output power <3 w for the future space-based gravitational wave detector lisa (laser interferometer space antenna). the fiber am... | highly stable fiber amplifier development and environmental component-testing for the space-based gravitational wave detector lisa |
scattering events around a supermassive black hole (smbh) will occasionally toss a stellar-mass compact object into an orbit around the smbh, beginning what is known as an extreme mass ratio inspiral (emri). the early stages of such a highly eccentric emri will not produce detectable gravitational waves because the sou... | improved modeling of highly eccentric emri signal confusion noise for lisa |
the levitated sensor detector (lsd), currently under development at northwestern university, is a next-generation gravitational-wave (gw) instrument operating in the 10 khz - 300 khz band. axion clouds will radiate in the lsd band if the boson's mass is in the range 2 x 10-11 ev - 6 x 10-10 ev. to estimate the number o... | gravitational-waves in the lsd band from a galactic population of axion clouds |
a search for track-like muon neutrino events detected by icecube consistent with the sky localization of gravitational-wave candidate s230518h in a time range of 1000 seconds centered on the alert event time (2023-05-18 12:50:48.000 utc to 2023-05-18 13:07:28.000 utc) has been performed [1,2]. during this time period i... | ligo/virgo s230518h: upper limits from icecube neutrino search |
in 2015, the first direct detection of gravitational waves was reported. data analysis indicated that the waves had originated from the violent collision of two black holes, which scattered them through space-time as einstein predicted. that detection was made possible by many advances in measurement technology, mainly... | the challenge of calibrating a laser interferometric gravitational wave detector |
the mass and spin properties of black hole binaries inferred from their gravitational-wave signatures reveal important clues about how these binaries form. for instance, stellar-mass black holes that evolved together from the same binary star will have spins that are preferentially aligned with their orbital angular mo... | prospects for measuring off-axis spins of binary black hole sources with a+ |
capacitive inertial reference sensors in space are a necessary technology for earth geodesy and gravitational wave observations. they consist of a test mass (tm) in free fall surrounded by an electrode housing. in the space environment, the tm accrues electric charge that eventually pollutes the science measurement. to... | charge management numerical modeling and experimental demonstrations for the lisa gravitational reference sensor |
in 2015, the detection of gravitational waves (gws) from merging black holes by the ligo scientific collaboration and the virgo collaboration opened a new era of observational astronomy. this thesis covers a range of topics on how to test the general theory of relativity using current and future gw detectors --- both g... | fundamental ways to probe gravitational waves across its spectrum and propagation |
by measuring the distance between two satellites orbiting the earth with microwaves, the gravity recovery and climate experiment (grace) mission has successfully monitored the gravity profile of the earth for over a decade. grace observed the earth's environment due to shifting water masses, giving insight into global ... | lisa technology demonstration and flight experience from grace follow-on and lisa pathfinder. |
a search for track-like muon neutrino events detected by icecube consistent with the sky localization of gravitational-wave candidate s230522n in a time range of 1000 seconds centered on the alert event time (2023-05-22 15:22:13.000 utc to 2023-05-22 15:38:53.000 utc) has been performed [1,2]. during this time period i... | ligo/virgo/kagra s230522n: upper limits from icecube neutrino search |
we present bhpwave, a new open-source waveform model that uses black hole perturbation theory to simulate the gravitational wave signals of stellar-mass compact objects undergoing quasi-circular inspirals into rotating massive black holes. these so-called extreme-mass-ratio inspirals (emris) will be ideal sources for f... | bhpwave: a perturbative gravitational waveform model for rotating black holes |
tidal interactions in coalescing binary neutron stars modify the dynamics of the inspiral, and hence imprint a signature on their gravitational-wave (gw) signals in the form of an extra phase shift. we need accurate models for the tidal phase shift in order to constrain the supranuclear equation of state from observati... | beyond the linear tide: impact of the nonlinear tidal response of neutron stars on gravitational waveforms for binary inspirals |
intermediate mass black holes are one of the key sources for joint observing by ground and space based gravitational wave detectors. this talk explores the promises of their detection, what a lack of detection by ground-based detectors means for lisa, and the role numerical relativity plays on their detection and inter... | merging intermediate mass black holes in ligo and lisa |
gravitational waveforms generated by numerical relativity were critical to the success of ground-based gravitational wave detection. in this talk, we illustrate some of the important factors for numerical relativity as ground-based detectors improve their sensitivity and space-based detectors prepare for first light. w... | numerical relativity in the lisa era |
polarization studies of the prompt emission from gamma-ray bursts (grbs) provide crucial information about the magnitude and coherence of magnetic fields carried by the astrophysical jets powering them. polarization studies of grbs to date present limited significance and conflicting results. the large area burst polar... | leap — a large area gamma-ray burst polarimeter for the iss |
linear processing of broadband traveling quantum fields are of interest in a variety of applications such as continous variable quantum information processing with gaussian states and linear precision sensing in devices such as gravitational-wave interferometers. the processing is carried out by linear quantum systems ... | systematically realizing unconventional coherent filters for high precision sensing |
the calet space experiment, which was developed by collaborators in japan, italy and the united states, has been mounted as an attached payload on the international space station (iss) japanese experiment module – exposed facility (jem-ef) since august 2015. over the >1,000 days of data taking the instrument has acc... | calet: extended mission and flight data analysis |
future gravitational wave detectors (gwds) require low noise, single frequency, continuous wave lasers with excellent beam quality and powers in excess of 500 w. low noise laser amplifiers with high spatial purity have been demonstrated up to 300 w. for higher powers, coherent beam combination can overcome scaling limi... | multiple beam coherent combination via an optical ring resonator |
theory predicts that gravitational-wave detectors should be able to observe a population of huge black holes. a new study explores what well learn from these mysterious objects and when we can hope to find them.a preferred sizea recent version of the rapidly expanding stellar graveyard, a plot that shows the masses of ... | jumping the gap to probe large black holes |
a space-borne gravitational wave detector requires the test mass (tm) to be in an ultra-low disturbance state. however, magnetic field fluctuations will disturb the tm and produce acceleration noise. to assess the influence of the magnetic field on the tm, it is necessary to monitor and reconstruct the magnetic field n... | magnetic field recovery technique based on distance weighting multipole expansion method |
data from gravitational-wave (gw) detectors often contains non-gaussian transient noise, known as glitches. in the upcoming fourth observation run, sensitivity improvements are expected to increase the rate of gw detection, therefore increasing the likelihood glitches will coincide with astrophysical signals. this type... | characterizing signal parameter bias in the presence of a glitch |
we develop data analysis methods to improve the sensitivity of searches for gravitational-wave signals from compact object binaries in networks of ground-based detectors, such as ligo, virgo and kagra. these are targeted for two different aspects of gravitational-wave data analysis. one focuses on blind searches in the... | a study of convex hull optimization and null-stream-based chi squared discrimination statistics for gravitational-wave signal analysis |
next generation ground- and space-based detectors will provide us with hundreds of gravitational wave signals from binary black holes, and we will rely on quick, high-fidelity models to extract as much information as possible from these signals. lisa will have high enough sensitivity to capture multiple ringdown freque... | a surrogate model for ringdown |
we introduce a systematic way to calculate the spectral sensitivity of an electromagnetic axion dark matter haloscope, so instrument comparison may be achieved independent of signal assumptions and only depends on the axion to signal transduction sensitivity and noise in the instrument [1]. furthermore, it has been sho... | comparison of axion haloscopes through the definition of axion spectral sensitivity and new experiments through systematic use of poynting theorem |
the ligo-virgo-kagra (lvk) collaboration has detected gravitational waves from 90 compact binary coalescences. in addition to fortifying the linearized theory of general relativity (gr), the statistical ensemble of detections provides information on the astrophysics of the binary sources and prospects detect nonlinear ... | detection of gravitational memory effect in lisa using triggers from ground-based detectors. |
since gravitational waves are extremely weak, the frequency noise of the lasers in space-based gravitational wave detectors need to be substantially reduced. one of the key technologies for this laser frequency reduction is arm locking. currently, all the reported controllers in arm locking have an inherent tradeoff be... | an inverse-design-based arm locking controller for space gravitational wave detector |
detection of gravitational wave (gw) signals in laser interferometers relies on having well modeled templates of the gw emission. we present a method of anomaly detection techniques based on deep recurrent autoencoders to the enhance the search region to potential, unmodelled transients. we use a semi-supervised strate... | quasi-anomalous gravitational-wave detection with recurrent autoencoders |
with the continued push for more-sensitive gravitational wave interferometers, reducing coating brownian thermal noise becomes increasingly essential. we report on the uncertainty in quality factor experiments, which are key measurements for predicting the thermal noise of the optics in gravitational wave detectors. th... | measurement and analysis of uncertainty in mechanical quality factor and implications for ligo thermal-noise estimation |
gravitational-wave detections of compact binaries provide a powerful independent technique to measure the expansion rate of the universe. using the recent observations of "lite" intermediate-mass black holes by the ligo and virgo detectors, we provide a unique set of observational correlation between the hubble constan... | constraints on pair-instability supernovae mass-gap and hubble constant from lite intermediate-mass black holes |
the european space agency (esa) and nasa funded laser interferometer space antenna (lisa) will detect new gravitational wave sources, opening the door for discovery in gravitational wave astronomy in the 2030s. lisa's wide frequency detection range presents data analysis challenges, with many gravitational wave signals... | lisa data challenge: emris |
tidal disruption events (tdes), apart from producing luminous electromagnetic (em) flares, can generate potentially detectable gravitational wave (gw) burst signals by future space-borne gw detectors. in this letter, we propose a methodology to constrain the hubble constant $h_0$ by incorporating the tde parameters mea... | multi-messenger constraint on the hubble constant $h_0$ with tidal disruption events |
polgraw-allsky searches for almost monochromatic gravitational wave signals. this pipeline searches for continuous gravitational wave signals in time-domain data using the f-statistic on data from a network of detectors. the software generates a parameter space grid, conducts a coherent search for candidate signals in ... | polgraw-allsky: all-sky almost-monochromatic gravitational-wave pipeline |
supermassive black hole (smbh) coalescences are ubiquitous in the history of the universe and often exhibit strong accretion activities and powerful jets. these smbh mergers are also promising candidates for future gravitational wave detectors such as laser space inteferometric antenna (lisa). in this work, we consider... | high-energy neutrino and electromagnetic counterparts of post-merger jets from super massive black hole mergers |
the imminent return to the moon by multiple space agencies and commercial companies has spurred astronomers to reconsider the moon as a site for ambitious telescopes. there are several concepts that use the rare properties of special sites on the moon to undertake astronomical observations not possible elsewhere. these... | protecting sites of extraordinary scientific importance to astronomy on the moon |
searches for track-like muon neutrino events detected by icecube consistent with the sky localization of gravitational-wave candidate s230904n in a time range of 1000 seconds centered on the alert event time (2023-09-04 05:01:53.000 utc to 2023-09-04 05:18:33.000 utc) have been performed [1,2]. during this time period ... | ligo/virgo/kagra s230904n: 1 counterpart neutrino candidate from icecube neutrino searches |
we have performed a search for track-like muon neutrino events detected by icecube consistent with the sky localization of the low-significance gravitational-wave candidate event s231215i in a time range of 1000 seconds centered on the alert event time (2023-12-15t02:22:01 utc to 2023-12-15t02:38:41 utc) [1,2]. during ... | ligo/virgo/kagra s231215i: 3 counterpart neutrino candidate events from an icecube neutrino search |
ever since their revival three decades ago, in the seminal work of morris and thorne, lorentzian wormholes in general relativity have led an uncomfortable existence because they require matter which violates the well-known energy conditions. however, in scalar-tensor and other theories of gravity, realistic wormholes c... | towards constraining realistic lorentzian wormholes through observations |
as gravitational wave detectors continue to observe an ever increasing number of merging binaries, it's crucial to have template banks which sufficiently span the parameter space. unfortunately, numerical relativity simulations, which provide the basis for these template banks, are time consuming and computationally ex... | predicting match to optimize numerical relativity template placement |
we propose the inter-satellite laser positioning system for precision formation flying. our system consists of a single frequency laser and acousto-optic deflectors, and the remote spacecraft can obtain their angle information by frequency counting of the laser beat signal. the accuracy of the angle measurement is eval... | laser-based satellite positioning system for space gravitational wave detector decigo |
the near infrared airglow camera (nirac) is a space based infrared imager deployed to the international space station in may 2019. the camera bandpass is 1.5 to 1.72 microns (h band), which is ideal for observation of the bright oh meinel airglow emission. nirac has a 23° x 23° fov, sweeping out a 160 km swath from the... | limb observations of atmospheric gravity waves in oh airglow from the iss using the near infrared airglow camera (nirac) |
magis-100 is a 100 meter baseline atom interferometer which will search for wavelike dark matter, serve as a prototype gravitational wave detector in the 0.3-3 hz frequency range, and realize large scale quantum superpositions. the interferometer will be assembled in the vertical minos access shaft at fermilab and will... | a tunable, high power interferometer beam with reduced pointing fluctuations and wavefront aberrations for 100-meter baseline atom interferometry (magis-100) |
the first detection of gravitational waves from a neutron star binary merger, gw 170817, provided us with the clear association between gravitational wave (gw) in-spiral and a gamma-ray burst (grb) events. new gw data from detectors such as ligo, virgo and kagra will be coming on-line in 2019. high energy observations ... | yamada conference lxxi: gamma-ray bursts in the gravitational wave era 2019 |
the observation of compact binary mergers by the ligo/virgo/kagra collaboration marked the dawn of a new era in astronomy. the planned third-generation ground-based detector (cosmic explorer and the einstein telescope) will allow us to peer far deeper, and lisa will open a new observational window at low frequencies. t... | gravitational wave astronomy: what's next? |
this article demonstrates the basic principle and the recent progress of gravitational wave detection based on information retrieval and literature review. the article describes and illustrates the gravitational wave, including the description of the adopted field equation and its properties. there is also a demonstrat... | research on the analytical development and progress of gravitational wave detection technology |
nirac is a space based infrared airglow imager that will be deployed to the international space station in late 2018, under the auspices of the space test program. nirac will survey oh airglow emissions in the 1.6 micron wavelength regime, exploring the spatial and temporal variability of emission intensities at latitu... | nirac: near infrared airglow camera for the international space station |
a torsion pendulum with 2 soft degrees of freedom (dof), realized by off-axis cascading two torsion fibers, has been built and operated. this instrument allows simultaneous measurement of force and torque acting on the suspended test mass, approaching free-fall condition down to a few mhz. it was developed for ground t... | a two-stage torsion pendulum for ground testing free fall conditions on two degrees of freedom |
in 1995, glendenning, kettner and weber postulated the existence of a new class of compact stars resembling white dwarfs but containing a small strange quark-matter core surrounded by hadronic layers attaining much higher densities than those found in white dwarfs. in our previous study, we have shown that it could be ... | role of quark matter and color superconductivity in the structure and tidal deformability of strange dwarfs |
the laser interferometer space antenna (lisa) is the leading interferometric detector for gravitational waves in space to whom temperature fluctuations (between others) present themselves as major threats to the overall precision and accuracy of detection. temperature fluctuations will typically dominate in the low fre... | microkelvin resolution temperature subsystem for space based gravitational wave detectors |
the future space-based gravitational-wave detector lisa will deliver rich and information-dense data by listening to the millihertz universe. thanks to a constellation of three satellites forming a network of interferometers, lisa will measure time series containing the imprint of tens of thousands of detectable astrop... | the many lisa data challenges |
stellar-mass black holes come from the deaths of massive stars, and have been observed both in our own galaxy and in other galaxies. supermassive black holes have masses of up to 10,000,000,000 times the mass of the sun and reside at the centers of galaxies. intermediate-mass black holes (imbhs), with masses in between... | multi-band width gravitational-wave astronomy with intermediate-mass ratio inspirals |
we reported a photon detection at the arrival time of the gravitational wave on december 26th, 2015. according to the ligo-virgo collaboration, the gravitational wave was produced by the merging process of the two black holes. the merged time was determined at 03:38:53.6 ut on december 26th. at 03:38:54.05 gps time, on... | a photon observed by the seda-fib detector on the arrival of the gravitational wave |
we study parameter estimation accuracy of nearly monochromatic sources of gravitational waves with the future elisa-like detectors. elisa will be capable of observing millions of such signals generated by orbiting pairs of compact binaries consisting of white dwarf, neutron star or black hole and to resolve and estimat... | parameter estimation accuracies of galactic binaries with elisa |
the observed acceleration of the present universe is commonly attributed to the existence of dark energy as a dominant component throughout the universe. a direct detection of dark energy has become one of the most important issues in the modern astrophysics and cosmology. two widely accepted candidates of the dark ene... | can ligo directly detect the scalar field dark energy of 5d gravity? |
gravitational waves emitted by inner binaries in hierarchical triples are interesting astrophysical candidates for space-based detectors like lisa. in the presence of a third body, the inner binary undergoes oscillations in eccentricity and inclination angle due to the kozai-lidov (kl) mechanism. in this talk, i will d... | imprint of kozai-lidov mechanism on gravitational waves |
a robust, space-based survey with a wide-fov, high-cadence, and precise photometric capability is needed to observe transient phenomena associated with the birth and evolving life of black holes and neutron stars. studies of extragalactic black holes and neutron stars have exploded with the development of gravitational... | cubesat for rapid ir and optical surveys |
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 |
we estimate the potential of present and future interferometric gravitational-wave detectors to test the kerr nature of black holes through ``gravitational spectroscopy,'' i.e. the measurement of multiple quasinormal mode frequencies from the remnant of a black hole merger. using population synthesis models of the form... | spectroscopy of kerr black holes with earth- and space-based interferometers |
space-based interferometric gravitational wave detectors such as lisa have been proposed to detect low-frequency gravitational wave sources such as the inspirals of compact objects into massive black holes or two massive black holes into each other. the optical components used to perform the high-precision interferomet... | a new optical bench concept for space-based laser interferometric gravitational wave missions |
gravitational waves are excellent tools to probe the foundations of general relativity in the strongly dynamical and non-linear regime. in this talk i will consider one such foundation, lorentz symmetry, which can be broken in the gravitational sector by the existence of a preferred time direction, and thus, a preferre... | projected constraints on lorentz-violating gravity with gravitational waves |
there is currently a great deal of interest in traveling ionospheric disturbances (tids) from both an observational and modeling perspective, especially as they apply to operational systems that rely on nowcasting the ionospheric state. astra has developed a new observational system to measure tid characteristics calle... | a simplified traveling ionospheric disturbance (tid) specification model based on tid detector built in texas (tiddbit) and gps total electron content (tec) measurements. |
space gravitational-wave (gw) detection requires the establishment of an ultra-long-range interplanetary laser communication link. compared with general inter-satellite laser communication, the power emitted by the laser is relatively small, and only a small part of the power is used to achieve communication. therefore... | communication reliability analysis of inter-satellite laser link based on transmission parameters |
the inflationary big bang model of cosmology generically predicts the existence of a background of gravitational waves due to inflation, which coupled into the b-mode power spectrum during the epochs of recombination and reionization. a measurement of the primordial b-mode spectrum would verify the reality of the infla... | developing the primordial inflation polarization explorer (piper) microwave polarimeter for constraining inflation |
the current generation of proposed space based interferometric gravitational wave detectors all use a reflecting telescope to transfer the laser signals between the space- craft. one of the proposed telescope designs is an on-axis classical cassegrain with the secondary mirror axially aligned to the primary mirror. sin... | simulations of an etched spiral axial attenuation scheme for an on-axis reflecting telescope |
physicists are designing a new breed of space-based gravitational-wave detectors that rely on cold atoms, as edwin cartlidge reports | cold atoms open new cosmic vista |
the evolved laser interferometer space antenna (elisa) is a space-based project which aims to detect gravitational waves in the frequency range 0.1 mhz to 1 hz. | an electro-optical simulator of the space based gravitational wave detector elisa |
the rasnik system is a 3-point optical displacement monitor with sub-nanometer precision. the ccd-rasnik alignment system was developed in 1993 for monitoring the alignment of the muon chambers of the atlas muon spectrometer at cern. since then, the development has continued as new cmos imaging pixel chips became avail... | the ultimate performance of the rasnik 3-point alignment system |
in high-sensitive laser interferometers, such as the gravitational-wave detector kagra, ultra-high-quality mirrors are essential. in the case of kagra, where cavity mirrors are cooled down to 20 k, large-size sapphire crystals are used as the substrate for the main mirrors to achieve both a good optical quality (i.e., ... | correlation between birefringence and absorption mapping in large-size sapphire substrates for gravitational-wave interferometry |
a considerable fraction of incident high-energy photons from astrophysical transients such as gamma-ray bursts (grbs) is compton scattered by the earth's atmosphere. these photons, sometimes referred to as the "reflection component", contribute to the signal detected by space-borne x-ray/$\gamma$-ray instruments. the e... | revisiting the earth's atmospheric scattering of x-ray/$\\gamma$-rays and its effect on space observation: implication for grb spectral analysis |
selex es produces a wide range of infrared detectors from mercury cadmium telluride (mct) and triglycine sulfate (tgs), and has supplied both materials into space programmes spanning a period of over 40 years. current development activities that underpin potential future space missions include large format arrays for n... | advances in selex es infrared detectors for space and astronomy |
the various materials of test masses, and the difference of arm lengths of global ground-based gravitational-wave interferometer detectors offer a unique approach to test newton's second law, weak equivalence principle, and einstein equivalence principle with dynamical space-time effects in terms of the interaction of ... | tests of interaction of gravitational waves with detectors |
in the last 20 years, the study of compact interacting binaries has led to two major breakthroughs in astrophysics: the discovery of dark energy and the first detection of gravitational waves. although binaries are critically important to probe the properties of the universe and to test fundamental physical theories, o... | accreting white dwarfs as probes of compact binary evolution |
the lisa mission is a proposed space-based gravitational wave detector that aims to detect gravitational waves in the signal-rich frequency band between 10-4 hz and 1 hz. among the many detection targets are supermassive black hole binary mergers, extreme mass ratio inspirals, and compact galactic binaries. lisa featur... | technology development for the lisa backlink |
future space observatories for gravitational radiation such as elisa require instrumentation capable of measuring magnetic fields with low-noise conditions at millihertz frequencies. the reason is that the main scientific payload can only operate successfully if the magnetic environment meets certain strict low-frequen... | in-orbit demonstration of a magnetic measurement system for space-borne gravitational wave detectors with a cubesat |
the event gw150914 produced strains of the order 10-21 in the two instruments comprising the laser interferometric gravitational wave observatory (ligo). the event has been interpreted as originating in a coalescing black hole binary, with individual components of about 30 solar masses each. a striking aspect of the co... | christodoulou memory of gw150914 - prospects of detection in ligo and future detectors |
with the success of lisa pathfinder, the measurement of gravitational waves in space has taken an important step forward. we conduct an analysis of the measurement abilities of distinctive lisa detector designs, examining how the low-frequency band-edge behavior of the detector sensitivity curve affects measurement cap... | exploring parameter space coverage of various lisa configurations |
we argue that the gravitational wave signal recently observed by the ligo detectors provides a powerful tool to probe the fundamental structure of space and time. in particular, we properly model the inspiral phase of two merging black holes in a noncommutative spacetime and extract an upper bound on the scale of such ... | probing the quantum fuzziness of space and time with gravitational waves |
we developed a new strategy for disaster risk reduction for gravitational slope failure: we propose a simple method for real-time early warning of gravity-driven failures that considers and exploits both the heterogeneity of natural media and characteristics of acoustic emissions attenuation. this method capitalizes on... | co-detection of micro seismic activity as early warning of gravitational slope failure |
lisa is sensitive to low-frequency gravitational waves from roughly 10 microhertz to 0.1 hertz. in the parameter space of binary systems, this corresponds roughly to orbital periods from roughly 2 days to tens of seconds. this part of the gravitational wave spectrum is rich in sources, but one of the most compelling is... | probing the mass spectrum of massive black holes with lisa |
the possibility to use a hong-ou-mandel (hom) interferometer to carry out gravitational waves detection and spectrometry is investigated. the noise budget of the instrument is evaluated. the basic experimental requirements are calculated. it is shown that the power and wavelength of the heralded photon source, together... | gravitational wave spectrometry with a hong-ou-mandel interferometer in space |
for studies of the european space agency esa, fraunhofer ilt develops and builds narrowband, power-stabilized fundamental mode fiber amplifiers especially for future space-based gravitational-wave detectors, e.g. lisa, and for earth gravity field missions. in this paper, we present the status of our ongoing work, based... | highly stable fiber lasers for satellite-based gravitational measurements |
atom wave interferometry is useful for navigation and scientific measurements because atoms have mass and are subject to gravity and acceleration. atom wave accelerometers, gyros, sensitive gravity gradiometers, and gravitational wave detection are all feasible. we can now build the atomic equivalents of optical interf... | atom wave interferometry for scientific measurement |
there is a possibility that stellar-mass black holes inhabit near the massive black hole sgr a* that is located at the center of our galaxy. such scenarios are motivated by the mass segregation of stellar-mass black holes on the massive end and disk migration if there were an active accretion flow near sgr a*. in this ... | science potential for stellar-mass black holes as neighbors of sgr a* |
the upcoming era of high-precision gravitational wave (gw) astronomy will allow us to more accurately probe the regime of strong-field gravity from massive compact object binary systems. as the sensitivity of gw detectors continues to improve, it is expected that waveform modeling errors will begin to dominate over sta... | error estimation and bounds for gravitational-wave surrogate models |
magis-100 is 100-meter-tall atom interferometer currently being built at fermilab which will leverage modern laser manipulation techniques to search for oscillations in fundamental constants and time-dependent, equivalence-principle-violating accelerations of test masses: key signatures of several ultra-light dark matt... | high-power and frequency-agile laser system for gravitational wave and dark matter detection using atom interferometry (magis-100) |
gravitational waves might help resolve the tension between early and late universe measurements of the hubble constant. recently, there has been enhanced interest in the possibility of gravitational wave detectors in the deci-hertz band which bridges the gap between lisa and ground-based detectors. such a detector is p... | multi-band gravitational wave cosmography with dark sirens |
as ground based interferometers continue to improve in sensitivity, especially at low frequencies, and with the advent of future space based interferometers, the duration that gravitational wave signals spend in the sensitive band of the detectors will increase. the assumption that the noise can be treated as approxima... | gravitational wave observartions in non-stationary detector noise |
a leading theory for how massive (and supermassive) black holes form is hierarchical merging the idea that massive black holes are built from a series of collisions between lighter black holes. densely packed environments like globular clusters and nuclear star clusters at the centers of galaxies are expected to be pri... | how often do black holes get kicked out of star clusters? |
scattering events around a supermassive black hole (smbh) will occasionally toss a stellar-mass compact object into an orbit around the smbh, beginning what is known as an extreme mass ratio inspiral (emri). the early stages of such a highly eccentric emri will not produce detectable gravitational waves because the sou... | improved modeling of highly eccentric emri signal confusion noise for lisa |
the near infrared airglow camera (nirac) is a space based infrared imager deployed to the international space station (iss) in may 2019. the camera bandpass is 1.5 to 1.72 microns (h band), which is ideal for observations of the bright oh meinel airglow emission. nirac has a 23° x 23° fov, sweeping out an approximate 1... | atmospheric gravity wave observations from the international space station using the near infrared airglow camera (nirac) |
being able to make precise measurements of distances and redshifts will help us understand how the universe is evolving. with the advent of gravitational wave observatories, we can make these measurements by using black holes in a very different way than before.standard sirensto measure how the universe is expanding, w... | a standard of black hole mergers |
one of the many types of transient noise observed in the advanced ligo gravitational wave detectors is due to light scattered from surfaces with large relative motion. these transients increase the background noise for astrophysical searches and reduces the reach of the detectors. this noise caused by low frequency ant... | noise transients in the ligo livingston detector due to trains |
the calorimetric electron telescope (calet) is a payload on the international space station for observation of high energy cosmic rays and gamma-rays. the calet has been in scientific operation since october 2015. the calorimeter, the main instrument of the calet, has been monitoring the gamma-ray sky in the energy ran... | gamma-ray observation with the calet |
magis-100 is 100-meter atom interferometer currently being built at fermilab which will leverage modern atom optics techniques to search for oscillations in fundamental constants and time-dependent, equivalence-principle-violating forces which are key signatures of several ultra-light dark matter candidates. in additio... | phase stabilized, frequency agile laser system for gravitational wave and dark matter detection using atom interferometry (magis-100) |
laser acquisition and pointing system is subject to establish a 106km magnitude inter-satellite laser link with ultra-high pointing precision of 10 nrad /√{hz} (1 mhz-1 hz) in space-based gravitational wave detection missions. for the unprecedented challenge, a dedicated laser link construction scheme with three differ... | on-ground demonstration of laser-link construction for space-based detection of gravitational waves |
space-based detector draws interest, but regulatory hurdles might complicate a partnership. | us and china eye up european gravitational-wave mission |
a search for track-like muon neutrino events detected by icecube consistent with the sky localization of the low-significance gravitational wave candidate s230726b in a time range of 1000 seconds centered on the alert event time (2023-07-26 01:06:47 utc to 2023-07-26 01:23:27 utc) has been performed [1,2]. during this ... | ligo/virgo/kagra s230726b: one counterpart neutrino candidate from icecube neutrino searches |
icecube has performed an additional search [1] for track-like muon neutrino events consistent with the sky localization of gravitational-wave candidate s230518h in a time range of -0.1 day, +14 days from the alert event time (2023-05-18 10:35:08.016 utc to 2023-06-01 12:59:08.016 utc). during this time period icecube w... | ligo/virgo/kagra s230518h: upper limits from a two-week icecube neutrino search |
persistent gravitational wave (gw) observables are generalizations of the gw memory effect that contain time-integrated changes in the spacetime curvature between two non-radiative regions. in asymptotically flat space-times at leading order in luminosity distance, these observables are determined by different temporal... | persistent gravitational wave observables from post-newtonian compact binaries |
flat-top sun shield is a part of the disturbance reducing system on the space-based gravitational wave detector tianqin. the sun shield is expected to guards temperature stability of the satellite's top deck from the low-frequency solar flux fluctuation. this paper introduces an analytic method to study the sun shield'... | thermal environment analysis for tianqin: iii. low-frequency thermal transfer inside the flat-top sun shield |
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