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Active Galactic Nuclei (AGNs) observed with the technique of very long baseline interferometry (VLBI) are used as fiducial references on the sky to precisely measure the shape and orientation of the Earth. Their positions form a celestial…

星系天体物理 · 物理学 2025-01-31 Ming Hui Xu , Patrick Charlot

The light from a source at a distance d will arrive at detectors separated by 100 AU at times that differ by as much as 120 (d/100 Mpc)^{-1} nanoseconds because of the curvature of the wavefront. At gigahertz frequencies, the arrival time…

宇宙学与河外天体物理 · 物理学 2023-05-10 Kyle Boone , Matthew McQuinn

Sun-like stellar oscillations are excited by turbulent convection and have been discovered in some 500 main sequence and sub-giant stars and in more than 12,000 red giant stars. When such stars are near gravitational wave sources, low-order…

太阳与恒星天体物理 · 物理学 2015-07-14 Ilídio Lopes , Joseph Silk

We discuss an astrometric timing effect on data analysis of continuous gravitational waves from rapidly rotating isolated neutron stars. Special attention is directed to the possibility of determining their distances by measuring the…

天体物理学 · 物理学 2009-11-11 Naoki Seto

We investigate the matching of continuous gravitational wave (CGW) signals in an all sky search with reference to Earth based laser interferometric detectors. We consider the source location as the parameters of the signal manifold and…

广义相对论与量子宇宙学 · 物理学 2014-11-17 S. K. Sahay

Next-generation ground-based gravitational-wave detectors, such as Cosmic Explorer (CE), are expected to be sensitive to gravitational-wave signals with frequencies as low as 5 Hz, allowing signals to spend a significant amount of time in…

高能天体物理现象 · 物理学 2023-08-25 Pratyusava Baral , Soichiro Morisaki , Ignacio Magaña Hernandez , Jolien D. E. Creighton

Interferometers with kilometer-scale arms have been built for gravitational-wave detections on the ground; ones with much longer arms are being planned for space-based detection. One fundamental motivation for long baseline interferometry…

广义相对论与量子宇宙学 · 物理学 2020-07-06 Kentaro Somiya , Keisuke Goda , Yanbei Chen , Eugeniy E. Mikhailov

Gravitational wave (GW) detection in space is aimed at low frequency band (100 nHz - 100 mHz) and middle frequency band (100 mHz - 10 Hz). The science goals are the detection of GWs from (i) Supermassive Black Holes; (ii) Extreme-Mass-Ratio…

天体物理仪器与方法 · 物理学 2016-12-06 Wei-Tou Ni

Advanced ground-based gravitational-wave (GW) detectors begin operation imminently. Their intended goal is not only to make the first direct detection of GWs, but also to make inferences about the source systems. Binary neutron-star mergers…

The first detection of a gravitational-wave signal of a coalescence of two black holes marked the beginning of the era of gravitational-wave astronomy, which opens exciting new possibilities in the fields of astronomy, astrophysics and…

广义相对论与量子宇宙学 · 物理学 2020-07-29 Stefan Grimm , Jan Harms

An observation of gravitational waves is a trigger of the multi-messenger search of an astronomical event. A combination of the data from two or three gravitational wave telescopes indicates the location of a source and low-latency data…

广义相对论与量子宇宙学 · 物理学 2022-06-08 Seiya Sasaoka , Hirotaka Takahashi , Yilun Hou , Kentaro Somiya

The canonical methods for gravitational wave detection are ground- and space-based laser interferometry, pulsar timing, and polarization of the cosmic microwave background. But as has been suggested by numerous investigators, astrometry…

天体物理仪器与方法 · 物理学 2018-07-25 Jeremy Darling , Alexandra E. Truebenbach , Jennie Paine

A method is presented to generalize the power detectors for short bursts of gravitational waves that have been developed for single interferometers so that they can optimally process data from a network of interferometers. The performances…

广义相对论与量子宇宙学 · 物理学 2009-11-10 Julien Sylvestre

A stochastic gravitational wave background causes the apparent positions of distant sources to fluctuate, with angular deflections of order the characteristic strain amplitude of the gravitational waves. These fluctuations may be detectable…

宇宙学与河外天体物理 · 物理学 2012-11-28 Laura G. Book , Éanna É. Flanagan

The detection of quasi-periodic sources of gravitational waves requires the accumulation of signal-to-noise over long observation times. If not removed, Earth-motion induced Doppler modulations, and intrinsic variations of the…

广义相对论与量子宇宙学 · 物理学 2009-10-31 Patrick R Brady , Teviet Creighton

In this paper we present the two-point angular correlation function of the X-ray source population of 1063 XMM-Newton observations at high Galactic latitudes, comprising up to ~30000 sources over a sky area of 125.5 sq. deg, in three energy…

宇宙学与河外天体物理 · 物理学 2015-05-13 J. Ebrero , S. Mateos , G. C. Stewart , F. J. Carrera , M. G. Watson

Atomic accelerometers and gravimeters are usually based on freely-falling atoms in atomic fountains, which not only limits their size, but also their robustness to environmental factors such as tilts, magnetic fields or vibrations. Such…

原子物理 · 物理学 2023-11-06 Cristian D. Panda , Matt Tao , Miguel Ceja , Andrew Reynoso , Holger Müller

We derive a lower bound on the sensitivity of generic mechanical and electromagnetic gravitational wave detectors. We consider both classical and quantum detection schemes, although we focus on the former. Our results allow for a simple…

广义相对论与量子宇宙学 · 物理学 2025-06-17 Raffaele Tito D'Agnolo , Sebastian A. R. Ellis

Several terrestrial detectors for gravitational waves and dark matter based on long-baseline atom interferometry are currently in the final planning stages or already under construction. These upcoming vertical sensors are inherently…

量子物理 · 物理学 2024-01-17 Fabio Di Pumpo , Alexander Friedrich , Enno Giese

Low-frequency gravitational-wave astronomy can perform precision tests of general relativity and probe fundamental physics in a regime previously inaccessible. A space-based detector will be a formidable tool to explore gravity's role in…