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neutrinos with large self-interactions, arising from exchange of light scalars or vectors with mass $m_\phi\simeq 10{\rm mev}$, can play a useful role in cosmology for structure formation and solving the hubble tension. it has been proposed that large self-interactions of neutrinos may change the observed properties of... | gravitational memory signal from neutrino self-interactions in supernova |
although the constraints on general relativity (gr) from each individual gravitational-wave (gw) event can be combined to form a cumulative estimate of the deviations from gr, the ever-increasing number of gw events used also leads to the ever-increasing computational cost during the parameter estimation. therefore, in... | forecasting constraints on the no-hair theorem from the stochastic gravitational wave background |
one of the primary goals of space-borne gravitational wave detectors is to detect and analyze extreme-mass-ratio inspirals (emris). this endeavor presents a significant challenge due to the complex and lengthy emri signals, further compounded by their inherently faint nature. in this letter, we introduce a 2-layer conv... | the detection, extraction and parameter estimation of extreme-mass-ratio inspirals with deep learning |
the comparison between the noncommutative length scale $\sqrt{\theta}$ and the length variation $\delta l=h l$, detected in the gw detectors indicate that there is a strong possibility to detect the noncommutative structure of space in the gw detector set up. we therefore explore how the response of a bar detector gets... | signatures of noncommutativity in bar detectors of gravitational waves |
in this paper, we review the theoretical basis for generation of gravitational waves and the detection techniques used to detect a gravitational wave. to materialize this goal in a thorough way we first start with a mathematical background for general relativity from which a clue for gravitational wave was conceived by... | gravitational wave: generation and detection techniques |
pulsars are fast-spinning neutron stars that lose their rotational energy via various processes such as gravitational and electromagnetic radiation, particle acceleration, and mass loss processes. pulsar energy dissipation can be quantified by a spin-down equation that measures the rate of change of pulsar rotational f... | the role of $r$-modes in pulsar spindown, pulsar timing and gravitational waves |
higher-order spatial laser modes have recently been investigated as candidates for reducing test-mass thermal noise in ground-based gravitational-wave detectors such as advanced ligo. in particular, higher-order hermite-gauss (hg) modes have gained attention within the community for their more robust behaviors against ... | experimental demonstrations of alignment and mode matching in optical cavities with higher-order hermite-gauss modes |
mid-frequency band gravitational-wave detectors will be complementary for the existing earth-based detectors (sensitive above 10 hz or so) and the future space-based detectors such as lisa, which will be sensitive below around 10 mhz. a ground-based superconducting omnidirectional gravitational radiation observatory (s... | a superconducting tensor detector for mid-frequency gravitational waves: its multi-channel nature and main astrophysical targets |
with the anticipated launch of space-based gravitational wave detectors, including lisa, taiji, tianqin, and decigo, expected around 2030, the detection of gravitational waves generated by intermediate-mass black hole binaries (imbbhs) becomes a tangible prospect. however, due to the detector's reception of a substanti... | parameter estimation for intermediate-mass binary black holes through gravitational waves observed by decigo |
the equations for gravitational plane waves produced by a typical binary system as a solution of linear approximation of einstein equations are derived. the dynamics of the corresponding gravitational field is analyzed in a four-dimensional space-time manifold, endowed with a metric and taking into account torsion. in ... | breaking of parallelograms in presence of torsion: an equivalent alternative approach to detect gravitational waves |
one strategy for reducing the online computational cost of matched-filter searches for gravitational waves is to introduce a compressed basis for the waveform template bank in a grid-based search. in this paper, we propose and investigate several tunable compression schemes for a general template bank. through offline ... | tunable compression of template banks for fast gravitational-wave detection and localisation |
with the enhancement of the sensitivity of gravitational wave (gw) detectors and capabilities of large survey facilities, such as the vera rubin observatory legacy survey of space and time (lsst) and the 2.5 m wide field survey telescope (wfst), we now have the potential to detect an increasing number of distant kilono... | kilonova-targeting lightcurve classification for wide field survey telescope |
with the ligo announcement of the first direct detection of gravitational waves (gws), the gw astronomy was formally ushered into our age. after one-hundred years of theoretical investigation and fifty years of experimental endeavor, this is a historical landmark not just for physics and astronomy, but also for industr... | precision requirements and innovative manufacturing for ultrahigh precision laser interferometry of gravitational-wave astronomy |
present and future space missions rely on systems of increasingly demanding performance for being successful. drag-free technology is one of the technologies that is fundamental for lisa-pathfinder, an esa mission whose launch is planned for the end of september 2015. a purely drag-free object is defined by the absence... | drag-free spacecraft technologies: criticalities in the initialization of geodesic motion |
gravitational wave detections with aligo have given us unrivalled insight into the extreme gravity regime, in which the gravitational field is strong and dynamical, but where will these types of detections be in 20 years? in this talk, we will explore how the construction of future generations of gravitational wave det... | gravitational wave tests of general relativity with future detectors |
supermassive black hole binaries (bhbs) are expected to be one of the most powerful sources of low-frequency gravitational waves (gws) for future space-borne detectors. prior to the gw emission stage, bhbs evolving in gas-poor nuclei shrink primarily through the slingshot ejection of stars approaching the bhb from suff... | star cluster disruption by a supermassive black hole binary |
current limits on violation of local lorentz invariance in the photon sector are derived mainly from experiments that search for a spatial anisotropy in the speed of light. the presently operating gravitational wave detectors are michelson interferometers with long effective arms, 4e5 m, and sensitive to a fringe shift... | proposed test of lorentz invariance using the gravitational wave interferometers |
more recently, fernandes \cite{fernandes:2023vux} discovered analytic stationary and axially-symmetric black hole solutions within semiclassical gravity, driven by the trace anomaly. the study unveils some distinctive features of these solutions. in this paper, we compute the gravitational waves emitted from the \ac{em... | gravitational waves from extreme-mass-ratio inspirals in the semiclassical gravity spacetime |
gravitational-wave data from interferometric detectors like ligo, virgo and kagra is routinely analyzed by rapid matched-filtering algorithms to detect compact binary merger events and rapidly infer their spatial position, which enables the discovery of associated non-gw transients like grb 170817a and at2017gfo. one o... | optimizing the low-latency localization of gravitational waves |
the laser interferometer space antenna (lisa) is scheduled to launch in the mid 2030s, and is expected to observe gravitational-wave candidates from massive black-hole binary mergers, extreme mass-ratio inspirals, and more. accurately inferring the source properties from the observed gravitational-wave signals is cruci... | bilby in space: bayesian inference for transient gravitational-wave signals observed with lisa |
we compute the stochastic gravitational wave (gw) background generated by black hole-black hole (bh-bh) hyperbolic encounters with eccentricities close to one and compare them with the respective sensitivity curves of planned gw detectors. we use the keplerian potential to model the orbits of the encounters and the qua... | detectability of gravitational wave stochastic background from weakly hyperbolic encounters |
stars are massive resonators that may in principle be used as gravitational-wave (gw) detectors with an isotropic sensitivity. new insights on stellar physics have been made possible by asteroseismology, the study of stars by the observation of their natural, resonant oscillations. the continuous monitoring of oscillat... | asteroseismology of red-giant stars as a novel approach in the search for gravitational waves |
quickly localizing the identified white dwarf (wd) binaries is the basic requirement for the space-based gravitational wave (gw) detection. in fact, the amplitude of gw signals are modulated by the periodic motion of gw detectors on the solar orbit. the intensity of the observed signals is enhanced according to the obs... | sky location of galactic white dwarf binaries in space-based gravitational wave detection |
spatial variations in survey properties due to selection effects generate substantial systematic errors in large-scale structure measurements in optical galaxy surveys on very large scales. on such scales, the statistical sensitivity of optical surveys is also limited by their finite sky coverage. by contrast, gravitat... | cosmological constraints from combining galaxy surveys and gravitational wave observatories |
in this study, we introduce a unique approach that employs time-resolved schlieren imaging to capture and visualize the dynamic changes of a thin liquid (mixture of water, soap and glycerin) film in ultrasonic wave field with high spatial and temporal resolution. by placing a soap film spanning a wire frame vertically ... | seeing the unheard: dynamics of thin liquid film in holographic ultrasonic field revealed by time-resolved schlieren imaging |
the detection of low-frequency gravitational waves on earth requires the reduction of displacement noise, which dominates the low-frequency band. one method to cancel test mass displacement noise is a neutron displacement-noise-free interferometer (dfi). this paper proposes a new neutron dfi configuration, a sagnac-typ... | sagnac-type neutron displacement-noise-free interferometeric gravitational-wave detector |
matched-filtering detection techniques for gravitational-wave (gw) signals in ground-based interferometers rely on having well-modeled templates of the gw emission. such techniques have been traditionally used in searches for compact binary coalescences (cbcs), and have been employed in all known gw detections so far. ... | gwak: gravitational-wave anomalous knowledge with recurrent autoencoders |
approximations are commonly employed in realistic applications of scientific bayesian inference, often due to convenience if not necessity. in the field of gravitational-wave (gw) data analysis, fast-to-evaluate but approximate waveform models of astrophysical gw signals are sometimes used in lieu of more accurate mode... | calibrating approximate bayesian credible intervals of gravitational-wave parameters |
the polar-2 gamma-ray burst (grb) polarimetry mission is a follow-up to the successful polar mission. polar collected six months of data in 2016-2017 on board the tiangong-2 chinese space laboratory. from a polarization study on 14 grbs, polar measured an overall low polarization and a hint for an unexpected complexity... | polar-2, the next generation of grb polarization detector |
in the context of the laser interferometer space antenna (lisa), the laser subsystems exhibit frequency fluctuations that introduce significant levels of noise into the measurements, surpassing the gravitational wave signal by several orders of magnitude. mitigation is achieved via time-shifting individual measurements... | compensation of front-end and modulation delays in phase and ranging measurements for time-delay interferometry |
current terrestrial gravitational-wave detectors operate at frequencies above 10 hz. there is strong astrophysical motivation to construct low-frequency gravitational-wave detectors capable of observing 10 mhz - 10hz signals. while space-based detectors provide one means of achieving this end, one may also consider ter... | suspending test masses in terrestrial millihertz gravitational-wave detectors: a case study with a magnetic assisted torsion pendulum |
lorentz symmetry (ls), one of the most fundamental physical symmetries, has been extensively studied in the context of quantum gravity and unification theories. many of these theories predict a ls violation, which could arise from the discreteness of spacetime, or extra dimensions. standard-model extension (sme) is an ... | testing lorentz symmetry with space-based gravitational-wave detectors |
tianqin is a proposed space-based gravitational-wave detector mission to be deployed and operated in high earth orbits. as a sequel to zhang et al (2021 phys. rev. d 103 062001), we investigate a type of 'orbital noise' in tianqin's range acceleration that is caused by gravitational perturbation associated with solar f... | effect of solar free oscillations on tianqin's range acceleration noise |
the computational cost of searching for gravitational wave (gw) signals in low latency has always been a matter of concern. we present a self-supervised learning model applicable to the gw detection. based on simulated massive black hole binary signals in synthetic gaussian noise representative of space-based gw detect... | self-supervised learning for gravitational wave signal identification |
gravitational-wave (gw) astrophysics is a field in full blossom. since the landmark detection of gws from a binary black hole on september 14th 2015, several compact-object binaries have been reported by the ligo-virgo collaboration. such events carry astrophysical and cosmological information ranging from an understan... | accurate waveform models for gravitational-wave astrophysics: synergetic approaches from analytical relativity |
gravitational wave astronomy is an emerging observational discipline that expands the astrophysical messengers astronomers can use to probe cosmic phenomena. the gravitational waveform from a source encodes the astrophysical properties and the dynamical motion of mass within the system; this is particularly evident in ... | understanding exotic black hole orbits using effective potentials |
intermediate mass black holes (imbhs) in the mass range 102-105 msun are thought to be the missing link between stellar black holes (bhs) and supermassive bhs. theoretical models have predicted their formation via hierarchical binary black hole (bbh) mergers and via runaway collisions. astronomers have sought them for ... | intermediate mass black holes in young star clusters |
gravitational-wave high-energy electromagnetic counterpart all-sky monitor (gecam) is a space-borne instrument dedicated to monitoring high-energy transients, including terrestrial gamma-ray flashes (tgfs) and terrestrial electron beams (tebs). we implemented a tgf/teb search algorithm for gecam, with which 147 bright ... | the first gecam observation results on terrestrial gamma-ray flashes and terrestrial electron beams |
future space gravitational-wave detectors will detect gravitational waves with high sensitivity in the mhz frequency band. one possible source is the stochastic gravitational-wave background (sgwb), possibly from astronomy and cosmology. detecting sgwb could provide an opportunity to directly examine the polarization o... | bayesian analysis of the stochastic gravitational-wave background with alternative polarizations for space-borne detectors |
parameter estimation plays a critical role in the detection of gravitational waves, and for space-based detectors, time delay interferometry is indispensable to ensure mission success. this paper employs the fisher matrix method to systematically analyze the parameter estimation and localization capabilities of tianqin... | parameter estimation of gravitational wave with various time-delay interferometry channels |
motivated by the necessity of a high-quality stray light control in the detection of the gravitational waves in space, the spot size of a flat top beam generated by the clipping of the gaussian beam (gb) is studied. by adopting the mode expansion method (mem) approach to simulating the beam, a slight variant of the def... | spot size estimation of flat-top beams in space-based gravitational wave detectors |
gw190521 is the most massive merging binary black hole (bbh) system detected so far. at least one of the component bhs was measured to lie within the pair-instability supernova (pisn) mass gap (~50-135 m⊙), making its formation a mystery. however, the transient observed signal allows alternative posterior distributions... | on the formation of gw190521-like binary black hole merger systems |
tianqin is a planned chinese space-based gravitational wave (gw) observatory with a frequency band of 10-4-1 hz. optical telescopes are essential for the delivery of the measurement beam to support a precise distance measurement between pairs of proof masses. as the design is driven by the interferometric displacement ... | pupil aberrations correction of the afocal telescope for the tianqin project |
onboard electrostatic suspension inertial sensors are important applications for gravity satellites and space gravitational-wave detection missions, and it is important to suppress noise in the measurement signal. due to the complex coupling between the working space environment and the satellite platform, the process ... | unsupervised noise reductions for gravitational reference sensors or accelerometers based on the noise2noise method |
we present high accuracy, fully nonlinear, numerical simulations of binary black holes up to a mass ratio of q = 30 . using improved methods, we extend the capabilities of the numerical relativity code, spec, to simulate binary black holes with mass ratios beyond its previous limit of q = 10 . such systems are potentia... | high mass-ratio binary black hole simulations in numerical relativity |
we describe the design principles, fabrication, and characterization of a precision ac resonant capacitance bridge (rcb) sensor, based on a resonant differential planar printed circuit board transformer with a solid (ungapped) mnzn ferrite core, demonstrating a short-term sensitivity at 293 k of 0.225 +/- 0.005 af/rthz... | noise and thermal performance of a sub-attofarad capacitance sensor for precision measurements, with applications in gravitational wave detectors |
phodex (phobos and deimos explorer) shall be launched on a soyuz fregat in 2024 or 2026, to explore the origin and evolution of phobos and deimos, as well as their interactions with the environments. the mission will shed light on the formation of the martian satellites and thus on evolution processes of the solar syst... | phodex ' a mission to explore the interiors of phobos and deimos |
in the near future, space-borne gravitational wave (gw) detector lisa can open the window of low-frequency band of gw and provide new tools to test gravity theories. in this work, we consider multi-parameter tests of gw generation and propagation where the deformation coefficients are varied simultaneously in parameter... | multi-parameter tests of general relativity using bayesian parameter estimation with principal component analysis for lisa |
spinning neutron stars (nss) can emit continuous gravitational waves (gws) that carry a wealth of information about the compact object. if such a signal is detected, it will provide us with new insight into the physical properties of matter under extreme conditions. according to binary population synthesis simulations,... | effects of spin-orbit coupling on gravitational waveforms from a triaxial nonaligned neutron star in a binary system |
the formation mechanism of am cvn binary has not been well understood yet. accurate measurements of the mass transfer rate can help us to determine the formation mechanism. but unfortunately such observation by electromagnetic means is quite challenging. one possible formation channel of am cvn binary is a semidetached... | measuring mass transfer of am cvn binaries with a space-based gravitational wave detector |
extremely-low mass white dwarf stars (elms) are m < 0.3 m_{⊙} helium-core white dwarfs born either as a result of a common-envelope phase or after a stable roche-lobe overflow episode in a multiple system. the universe is not old enough for elms to have formed through single-star evolution channels. as remnants of b... | gaia dr2 catalogue of extremely-low mass white dwarf candidates |
since the very first detection of gravitational waves from the coalescence of two black holes in 2015, bayesian statistical methods have been routinely applied by ligo and virgo to extract the signal out of noisy interferometric measurements, obtain point estimates of the physical parameters responsible for producing t... | computational techniques for parameter estimation of gravitational wave signals |
heterodyne detectors as phase-insensitive (pi) devices have found important applications in precision measurements such as space-based gravitational-wave (gw) observation. however, the output signal of a pi heterodyne detector is supposed to suffer from signal-to-noise ratio (snr) degradation due to image band vacuum a... | heterodyne detection enhanced by quantum correlation |
the direct detection of gravitational waves by ground-based optical interferometers has opened a new window in astronomy. nevertheless, as these detectors are a combination of two michelson-morley like baselines, their sensitivity for determining the incident direction of a gravitational wave is quite weak compared to ... | on the principle of astrometric gravitational wave antenna |
it is widely accepted that quite a number of double compact objects (dcos) in the milky way can be identified by future space-based gravitational wave (gw) detectors, while systematic investigations on the detection of the gw sources in nearby galaxies are still lacking. in this paper, we present calculations of potent... | detection prospects of fast-merging gravitational wave sources in m31 |
common spatial patterns (csp) is a feature extraction algorithm widely used in brain-computer interface (bci) systems for detecting event-related potentials (erps) in multi-channel magneto/electroencephalography (meg/eeg) time series data. in this article, we develop and apply a csp algorithm to the problem of identify... | application of common spatial patterns in gravitational waves detection |
the neutron star-black hole binary (nsbh) system has been considered one of the promising detection candidates for ground-based gravitational-wave (gw) detectors such as ligo and virgo. the tidal effects of neutron stars (nss) are imprinted on the gw signals emitted from nsbhs as well as binary neutron stars. the ns ti... | measurability of neutron star tidal deformability from merging neutron star-black hole binaries |
the discovery in recent years by gravity wave detectors of dozens of merging binary black holes with masses much greater than one solar mass, when taken with the known population of black holes raises the possibility that it may not be possible to explain their all their origins and growth by credible accretion mechani... | is accretion alone enough to explain the mass spectrum of black holes? |
laser heterodyne interferometry plays a key role in the proof mass's monitor and control by measuring its multiple degrees of freedom motions in the space gravitational wave detection. laboratory development of polarization-multiplexing heterodyne interferometer (pmhi) using quadrant photodetectors (qpd) is presented i... | laboratory development of a heterodyne interferometric system for translation and tilt measurement of the proof mass in the space gravitational wave detection |
the recent discovery of gravitational waves from merging pairs of massive black holes [1-4] and even neutron stars [5] has marked the beginning of a new chapter in astronomy. the increasing sensitivity of the next generation of ground-based gravitational wave detectors and of the future space-borne ones will allow for ... | massive black hole masses in the context of gravitational wave observations |
the subsolar mass primordial black hole (pbh) attracts attention as robust evidence of its primordial origin against the astrophysical black hole. not only with themselves, pbhs can also form binaries with ordinary astrophysical objects, catching them by gravitational wave (gw) bremsstrahlung. we discuss the detectabil... | prospects of detection of subsolar mass primordial black hole and white dwarf binary mergers |
gravitational waves, detected a century after they were first theorized, are spacetime distortions caused by some of the most cataclysmic events in the universe, including black hole mergers and supernovae. the successful detection of these waves has been made possible by ingenious detectors designed by human experts. ... | digital discovery of interferometric gravitational wave detectors |
squeezed, nonclassical states are an integral tool of quantum metrology due to their ability to push the sensitivity of a measurement apparatus beyond the limits of classical states. while their creation in light has become a standard technique, the production of squeezed states of the collective excitations in gases o... | two-mode phonon squeezing in bose-einstein condensates for gravitational wave detection |
we explore different facets of the action of linearized gravitational waves in minkowski spacetime background upon light, under the electromagnetic geometrical optics limit, covering the main aspects: light trajectory perturbations, radar distance and light frequency shift. for this purpose, we consider observers comov... | influence of gravitational waves upon light. part i. null geodesics, radar distance and frequency shift |
eccentricity in binary black hole mergers is a clear sign that some kind of dynamical processes were responsible for the coalescence of the binary. in this talk, i will overview eccentricity predictions from various dynamical formation channels, and what an eccentric gravitational-wave detection would imply for binary ... | astrophysical implications of eccentric black hole mergers |
since it was confirmed two decades ago that the expansion of the universe is accelerating, it would be of theoretical interests to figure out what is the influence from cosmological constant on detection of stochastic gravitational wave background. this paper studies the overlap reduction functions in de-sitter space-t... | overlap reduction function for gravitational wave detectors in an expanding universe |
hermes pathfinder (high energy rapid modular ensemble of satellites pathfinder) is a space mission based on a constellation of nano-satellites in a low earth orbit, hosting new miniaturized detectors to probe the x-ray temporal emission of bright high-energy transients such as gamma-ray bursts and the electromagnetic c... | the power supply unit onboard the hermes nano-satellite constellation |
the tidal response of compact stars in a binary system is a useful probe of the stellar interior. while the equilibrium part of the tide dominates the matter response for systems with a large orbital separation, the dynamical tide starts to become important for small separation as the orbital period gets closer to the ... | effects of dynamical tides on gravitational wave signals from eccentric double white dwarf systems |
with the inception of gravitational wave astronomy, astrophysical studies using interferometric techniques have begun to probe previously unknown parts of the universe. in this work, we investigate the potential of a new interferometric experiment to study a unique group of gravitationally interacting sources within ou... | probing the dark solar system: detecting binary asteroids with a space-based interferometric asteroid explorer |
cross correlation heterodyne detectors exhibit the potential for suppression of the detection quantum noise below shot noise without use of optical squeezing for capturing weak optical signals in low frequency bands. to understand the underlying mechanism, we develop a quantum theory to describe the noise performance o... | quantum theory of cross correlation heterodyne detection |
radiation pressure (rp) noise, one component of quantum noise, can limit the sensitivity of laser interferometric gravitational wave (gw) detectors at lower frequencies. we conceived a possible rp noise cancellation method, using phase flipped ponderomotive-squeezed light (fpsl) incident on free-mass mirrors in interfe... | can the phase of radiation pressure fluctuations be flipped in a single path for laser interferometric gravitational wave detectors? |
the laser interferometer gravitational-wave observatory's (ligo) detection of binary black hole mergers has revealed a stellar-mass and an intermediate-mass black hole(imbh) population that is more massive than the population detected by electromagnetic observations. some of these mergers would be detectable in an earl... | a sea of black hole binaries: characterizing the expected signature of stellar origin and ligo intermediate-mass binaries in the lisa band |
the near infrared airglow camera (nirac) is an imager that was deployed to the international space station (iss) in may 2019. nirac's bandpass (1.5-1.72 microns) and field of view (∼23° × 23°) are ideal for observations of the bright oh meinel airglow emission. nirac utilizes a 4-megapixel teledyne h2rg detector, a cus... | atmospheric gravity wave and instability observations from the international space station using the near infrared airglow camera (nirac) |
tianqin is a proposed space-based gravitational-wave detector designed to operate in circular high earth orbits. as a sequel to [zhang et al. phys. rev. d 103, 062001 (2021), 10.1103/physrevd.103.062001], this work provides an analytical model to account for the perturbing effect of the earth's gravity field on the ran... | effect of earth-moon's gravity on tianqin's range acceleration noise. iii. an analytical model |
icecube has performed an additional search [1] for track-like muon neutrino events consistent with the sky localization of gravitational-wave candidate s230529ay in a time range of -0.1 day, +14 days from the alert event time (2023-05-29 15:51:00.03 utc to 2023-06-12 18:15:00.03 utc). during this time period icecube wa... | ligo/virgo/kagra s230529ay: upper limits from a two-week icecube neutrino search |
we present {bhpwave}: a new python-based, open-source tool for generating the gravitational waveforms of stellar-mass compact objects undergoing quasi-circular inspirals into rotating massive black holes. these binaries, known as extreme-mass-ratio inspirals (emris), are exciting mhz gravitational wave sources for futu... | bhpwave: an adiabatic gravitational waveform model for compact objects undergoing quasi-circular inspirals into rotating massive black holes |
the extreme mass ratio inspirals(emris) are promising gravitational wave(gw) sources for space-borne gw detectors. the signals of emris usually have long timescales, ranging from several months to several years, and their detection requires accurate gw signal templates. in most waveform models, the compact objects in e... | recognizing the constitution of small bodies in extreme-mass-ratio inspirals by gravitational waves |
blackcat is a 6u cubesat mission designed to monitor the soft x-ray sky, searching for high-redshift gamma-ray bursts (grbs), counterparts to gravitational-wave events, and other high-energy transient phenomena. the instrument uses an array of four event-driven x-ray hybrid cmos detectors and a coded-aperture mask. thi... | planned observations and science with the blackcat cubesat x-ray observatory and transient monitor |
i will present an overview of the space industry responsive intelligent thermal (spirit) 6u cubesat, to be launched in space by 2022. spirit is an australia-italy mission for high-energy astrophysics that will carry a scintillator crystal photo detector sensitive to x-rays and gamma-rays, actively cooled through a stir... | the spirit cubesat: high energy astrophysics in harsh radiation environments and new technology demonstration |
magis-100 is a long-baseline atom interferometer that operates as a quantum sensor. it will search for dark matter, probe fundamental quantum science, and serve as a prototype gravitational wave detector in the 0.3 to 3~hz frequency range. the experiment uses light-pulse atom interferometry where pulses of light create... | beam profiling with noise reduction from computer vision and principal component analysis for the magis-100 experiment |
during the period covered in the present catalog (2011-2021), the interplanetary network (ipn) contained between seven and nine missions: the konus-wind (kw), in orbit around the lagrangian point l1; mars odyssey (a gamma-ray spectrometer, grs, that includes the high-energy neutron detector, hend, with grb detection ca... | vizier online data catalog: 2nd cat. of ipn localizations of konus short grbs (svinkin+, 2022) |
we hereby propose an alternative and additional angle on the nature of gravitational waves (gws), postulating the theoretical and experimental possibility that gws carry a deformation of the time component of spacetime, other than the spatial one. by explicitly working outside of the transverse-traceless gauge, we prop... | non canonical polarizations of gravitational waves |
precise optical mode matching is of critical importance in experiments using squeezed-vacuum states. automatic spatial-mode matching schemes have the potential to reduce losses and improve loss stability. however, in quantum-enhanced coupled-cavity experiments, such as gravitational-wave detectors, one must also ensure... | single and coupled cavity mode sensing schemes using a diagnostic field |
quantum locking using optical spring and homodyne detection has been devised to reduce the quantum noise that limits the sensitivity of the decigo, a space-based gravitational-wave antenna in the frequency band around 0.1 hz for the detection of primordial gravitational waves. the reduction in the upper limit of energy... | optimization of quantum noise in space gravitational-wave antenna decigo with optical-spring quantum locking considering mixture of vacuum fluctuations in homodyne detection |
lisa pathfinder, a precursor to the space-based gravitational wave observatory, lisa, operated at the l1 lagrange point between the sun and the earth between january 2016 and july 2017. the esa-led mission successfully demonstrated the technology required to achieve the ambitious goals of lisa, most notably the pure fr... | measurements of test mass charging in the lisa pathfinder mission |
the extreme mass ratio inspiral system is one of the most important wave sources for space gravitational wave detectors. in gravitational wave detection, a high precision gravity waveform template is required. many gravitational wave calculation models use test particles as small-mass objects at present,while ignoring ... | analysis of the influence of the mass quadrupole moment of compact objects on the orbital frequency in the mass-to-mass ratio binary system |
a search for track-like muon neutrino events detected by icecube consistent with the sky localization of the low-significance gravitational wave candidate s230812aj in a time range of 1000 seconds centered on the alert event time (2023-08-12 11:56:00 utc to 2023-08-12 12:12:40 utc) has been performed [1,2]. during this... | ligo/virgo/kagra s230812aj: two counterpart neutrino candidates from icecube neutrino searches |
x-ray observation covering a wide field of view with high sensitivity is essential in searching for an electromagnetic counterpart of gravitational wave events. a lobster-eye optics (leo) and a large area cmos sensor are effective instruments to achieve this goal. furthermore, thanks to the light weight of leo, it can ... | application of the grade selection of x-ray events using machine learning for a cubesat mission |
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 |
many hot jupiters have been observed to have orbits that are highly misaligned with respect to the stellar rotation, but the origins of these misalignments are still unclear. a large number of theoretical mechanisms have been proposed to generate misaligned orbits, but observational constraints are lacking. many of the... | the spin-orbit misalignments of hot jupiters may be correlated with stellar companions, but not with metallicity |
the past two decades have seen a significant advancement in the detection, classification and understanding of exoplanets and binary star systems. the vast majority of these systems consist of objects on the main sequence or the giant branch, leading to a dearth of knowledge of properties at early times (<50 myr). o... | a wide angle survey of young stellar associations for hot jupiters and pre-main sequence binaries |
both ground-based doppler surveys and nasa's kepler mission have discovered a diversity of planetary system architectures that challenge theories of planet formation. systems of tightly-packed or near-resonant planets are particularly useful for constraining theories of orbital migration and the excitation of orbital e... | strongly interacting planetary systems |
with the purpose of exploring the ordos block, western north china craton, two controlled-source deep seismic transects were conducted across this region. the first one is a 650 km long profile oriented n-s; the second is 1530 km and is oriented e-w. the upper mantle p wave-velocity derived from these profiles features... | anisotropy and tectonic deformation in the ordos basin revealed by an active source seismic experiment |
heartbeat stars are an emerging class of eccentric (e > 0.2) short-period ellipsoidal variables that undergo strong tidal interactions near orbital periastron. in the kepler data we have identified 173 heartbeat stars, %20 of which pulsate with tidally excited modes: stellar oscillation modes that are excited to obs... | heartbeat stars: the key to unlocking the formation and circularization of tight binaries and short period planets |
this thesis develops two main topics related to the study of the long-term orbital evolution of planetary systems. the first one is the long-term dynamical stability of planetary systems. by running a large number of orbit integrations i find a new and easy-to-use criterion for the long-term stability of two-planet sys... | long-term orbital evolution of planetary systems: stability, migration, and other fates |
many planet pairs lie just wide of first-order mean motion resonances (mmrs), and tidal forces have been frequently proposed to explain these pileups. we contribute to this ongoing discussion by calculating an optimistic theoretical estimate on the minimum initial eccentricity required by kepler planets to explain the ... | tidal forces cannot explain planets close to 2:1 mean motion resonance |
this talk provides a broad overview on the physical processes governing planet formation and evolution. in the first part of the talk, current key observational constraints for theoretical models will be discussed coming from both ground and space-based observatories. then, the most important physical mechanisms contro... | the physics of planet formation |
the giant planets are orbited by a swarm of irregular satellites that exhibit orbits with chracteristic large semi major axis, high inclinations and/or high eccentricities. many of these show retrograde orbits (jewitt & sheppard, 2005) further highlighting how different they are from regular moons in much closer in... | saturnian moon's size distribution |
warm jupiters are a mysterious class of giant planet in ~10-100 day orbits whose origins are debated. many have intermediate eccentricities too high to have been excited by planet-disk interactions or planet-planet scattering following in situ formation or disk migration but too low for the warm jupiter to be currently... | mitigating bias in testing the origins of warm jupiters via constraints on transit duration variations |
lithosphere-asthenosphere boundary beneath the wudalianchi volcanoes constrained from s-receiver function migration fanchang meng1,2, yinshuang ai1,2,3, jianshe lei4 key laboratory of earth and planetary physics, institute of geology and geophysics, chinese academy of sciences, 100029, beijing, china college of earth a... | lithosphere-asthenosphere boundary beneath the wudalianchi volcanoes constrained from s-receiver function migration |
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