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We develop a numerical scheme to make a high-frequency skymap of gravitational-wave backgrounds (GWBs) observed via space-based interferometer. Based on the cross-correlation technique, the intensity distribution of anisotropic GWB can be…

广义相对论与量子宇宙学 · 物理学 2008-11-26 Atsushi Taruya

We study the response function of the Einstein Telescope to kinematic Doppler anisotropies, which represent one of the guaranteed properties of the stochastic gravitational wave background. If the frequency dependence of the stochastic…

广义相对论与量子宇宙学 · 物理学 2023-05-03 Debika Chowdhury , Gianmassimo Tasinato , Ivonne Zavala

Statistical anisotropy in the nanohertz-frequency gravitational-wave background (GWB) is expected to be detected by pulsar timing arrays (PTAs) in the near future. By developing a frequentist statistical framework that intrinsically…

高能天体物理现象 · 物理学 2022-12-14 Nihan Pol , Stephen R. Taylor , Joseph D. Romano

As one of the primary detection targets for contemporary gravitational wave (GW) observatories, the stochastic gravitational wave background (SGWB) holds significant potential for enhancing our understanding of the early universe's…

广义相对论与量子宇宙学 · 物理学 2025-10-15 Jin Li , Meijin Li , Nan Yang , Li Wang , Hao Yu , Yingzhou Huang , Kai Lin , Zi-Chao Lin , Fangyu Li

Anisotropic stochastic gravitational wave background (SGWB) serves as a potential probe of the large-scale structure (LSS) of the universe. In this work, we explore the anisotropic SGWB from local ($z < \sim 0.085$) merging stellar mass…

高能天体物理现象 · 物理学 2025-07-01 Zhencheng Li , Zhen Jiang , Yun Liu , Xi-Long Fan , Liang Gao , Yun Chen , Tengpeng Xu

Future GW observatories, such as the Einstein Telescope (ET), are expected to detect gravitational wave signals, some of which are likely to overlap with each other. This overlap may lead to misidentification as a single GW event,…

天体物理仪器与方法 · 物理学 2024-07-19 Cunliang Ma , Weiguang Zhou , Zhoujian Cao

One of the open issues of the standard cosmological model is the value of the cosmic dipole measured from the Cosmic Microwave Background (CMB), as well as from the number count of quasars and radio sources. These measurements are currently…

宇宙学与河外天体物理 · 物理学 2023-06-09 S. Mastrogiovanni , C. Bonvin , G. Cusin , S. Foffa

With pulsar timing arrays (PTAs) having observed a gravitational wave background (GWB) at nanohertz frequencies, the focus of the field is shifting towards determining and characterizing its origin. While the primary candidate is a…

天体物理仪器与方法 · 物理学 2025-09-10 Kyle A. Gersbach , Stephen R. Taylor , Bence Bécsy , Anna-Malin Lemke , Andrea Mitridate , Nihan Pol

The circular polarization of the stochastic gravitational wave background (SGWB) is a key observable for characterising the origin of the signal detected by Pulsar Timing Array (PTA) collaborations. Both the astrophysical and the…

宇宙学与河外天体物理 · 物理学 2024-06-10 N. M. Jiménez Cruz , Ameek Malhotra , Gianmassimo Tasinato , Ivonne Zavala

The second-generation interferometric gravitational wave detectors currently under construction are expected to make their first detections within this decade. This will firmly establish gravitational wave physics as an empirical science…

广义相对论与量子宇宙学 · 物理学 2015-06-15 Chris Van Den Broeck

The Einstein Telescope (ET) is going to bring a revolution for the future of multi-messenger astrophysics. In order to detect the counterparts of binary neutron star (BNS) mergers at high redshift, the high-energy observations will play a…

The Laser Interferometer Space Antenna (LISA) will observe mHz gravitational waves from a wide variety of astrophysical sources. Of these, some will be characterizable as individual deterministic signals; the remainder will overlap to…

天体物理仪器与方法 · 物理学 2025-08-29 Alexander W. Criswell , Sharan Banagiri , Jessica Lawrence , Levi Schult , Steven Rieck , Stephen R. Taylor , Vuk Mandic

The anisotropies of the Stochastic Gravitational-Wave Background (SGWB) produced by merging compact binaries constitute a possible new probe of the Large-Scale Structure (LSS). However, the significant shot noise contribution caused by the…

宇宙学与河外天体物理 · 物理学 2022-03-07 Giulia Capurri , Andrea Lapi , Carlo Baccigalupi

The subtle influence of gravitational waves on the apparent positioning of celestial bodies offers novel observational windows. We calculate the expected astrometric signal induced by an isotropic Stochastic Gravitational Wave Background…

广义相对论与量子宇宙学 · 物理学 2025-10-27 Giorgio Mentasti , Carlo R. Contaldi

Next-generation gravitational-wave detectors like the Einstein Telescope and Cosmic Explorer, currently in their preparatory phase, have the potential to significantly improve our understanding of astrophysics, cosmology and fundamental…

广义相对论与量子宇宙学 · 物理学 2025-01-23 Michael Ebersold , Tania Regimbau , Nelson Christensen

A first-order phase transition in the early universe can give an observable stochastic gravitational background (SGWB), which will necessarily have primordial anisotropies across the sky. In multi-field inflationary scenarios, these…

宇宙学与河外天体物理 · 物理学 2022-10-12 Arushi Bodas , Raman Sundrum

The collection of individually resolvable gravitational wave (GW) events makes up a tiny fraction of all GW signals which reach our detectors, while most lie below the confusion limit and go undetected. Like voices in a crowded room, the…

广义相对论与量子宇宙学 · 物理学 2022-03-02 Arianna I. Renzini , Boris Goncharov , Alexander C. Jenkins , Pat M. Meyers

The isotropic stochastic gravitational wave background (SGWB) generated by a population of supermassive black hole binaries (SMBHBs) provides a unique window into their cosmic evolution. In addition to the isotropic power spectrum, the…

宇宙学与河外天体物理 · 物理学 2025-03-18 Mohit Raj Sah , Suvodip Mukherjee

Future missions of gravitational-wave astronomy will be operated by space-based interferometers, covering very wide range of frequency. Search for stochastic gravitational-wave backgrounds (GWBs) is one of the main targets for such…

广义相对论与量子宇宙学 · 物理学 2009-11-11 Hideaki Kudoh , Atsushi Taruya , Takashi Hiramatsu , Yoshiaki Himemoto