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The successive discoveries of binary merger events by Advanced LIGO-Virgo have been revealing the statistical properties of binary black hole (BBH) populations. A stochastic gravitational wave background (GWB) is a useful tool to probe the…

宇宙学与河外天体物理 · 物理学 2021-09-29 Kohei Inayoshi , Kazumi Kashiyama , Eli Visbal , Zoltan Haiman

Ultralight bosons are possible fundamental building blocks of nature, and promising dark matter candidates. They can trigger superradiant instabilities of spinning black holes (BHs) and form long-lived "bosonic clouds" that slowly dissipate…

广义相对论与量子宇宙学 · 物理学 2021-12-10 Chen Yuan , Richard Brito , Vitor Cardoso

Strong evidence of the existence of the Stochastic Gravitational-Wave Background (SGWB) has been reported by the NANOGrav, PPTA, EPTA and CPTA collaborations. The Bayesian posteriors of the Gravitational-Wave Background (GWB) amplitude and…

广义相对论与量子宇宙学 · 物理学 2023-07-04 Chao Zhang , Ning Dai , Qing Gao , Yungui Gong , Tong Jiang , Xuchen Lu

The existence of a primordial stochastic gravitational wave background (SGWB) is a common prediction in various models of the early Universe. Despite constraints at different frequency ranges and claims of detection in the nHz range by…

宇宙学与河外天体物理 · 物理学 2024-09-24 Matteo Braglia , Mauro Pieroni , Sylvain Marsat

The NANOGrav, PPTA, EPTA, CPTA and MPTA collaborations have reported compelling evidence for the existence of the Stochastic Gravitational-Wave Background (SGWB). This inferred background's amplitude and frequency spectrum align closely…

高能天体物理现象 · 物理学 2025-07-08 Zhao-Qiang Shen , Guan-Wen Yuan , Yi-Ying Wang , Yuan-Zhu Wang , Yin-Jie Li , Yi-Zhong Fan

Search sensitivity to a stochastic gravitational-wave background (SGWB) is enhanced by cross-correlating detector signals. However, one of the most serious concerns is the environmental noise correlated between detectors. The global…

广义相对论与量子宇宙学 · 物理学 2023-04-05 Yoshiaki Himemoto , Atsushi Nishizawa , Atsushi Taruya

The era of Gravitational-Wave (GW) astronomy will grant the detection of the astrophysical GW background from unresolved mergers of binary black holes, and the prospect of probing the presence of primordial GW backgrounds. In particular,…

宇宙学与河外天体物理 · 物理学 2023-04-26 Davide Racco , Davide Poletti

Massive stellar origin black hole binaries (SBHBs), originating from stars above the pair-instability mass gap, are primary candidates for multiband gravitational wave (GW) observations. Here we study the possibility to use them as…

宇宙学与河外天体物理 · 物理学 2022-02-16 Niccolò Muttoni , Alberto Mangiagli , Alberto Sesana , Danny Laghi , Walter Del Pozzo , David Izquierdo-Villalba , Mattia Rosati

Gravitational wave (GW) observations have provided a novel tool to explore the universe. In the near future, space-borne detectors will further open the window of low-frequency GW band where abundant sources exist and invaluable information…

广义相对论与量子宇宙学 · 物理学 2024-11-21 Rui Niu , Wen Zhao

In the frequency band of Laser Interferometer Space Antenna (LISA), extensive research has been conducted on the impact of foreground confusion noise generated by galactic binaries within the Milky Way galaxy. Additionally, the recent…

宇宙学与河外天体物理 · 物理学 2023-09-26 Fan Huang , Yan-Chen Bi , Zhoujian Cao , Qing-Guo Huang

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 unprecedented range of second-generation gravitational-wave (GW) observatories calls for refining the predictions of potential sources and detection rates. The coalescence of double compact objects (DCOs)---i.e., neutron star-neutron…

高能天体物理现象 · 物理学 2015-07-07 M. Dominik , E. Berti , R. O'Shaughnessy , I. Mandel , K. Belczynski , C. Fryer , D. Holz , T. Bulik , F. Pannarale

In the study of gravitational waves (GWs), the stochastic background generated by compact binary systems are among the most important kinds of signals. The reason for such an importance has to do with their probable detection by the…

宇宙学与河外天体物理 · 物理学 2015-04-17 E. F. D. Evangelista , J. C. N. de Araujo

Rotating neutron stars (NSs) are promising sources of gravitational waves (GWs) in the frequency band of ground-based detectors. They are expected to emit quasi-monochromatic, long-duration GW signals, called continuous waves (CWs), due to…

广义相对论与量子宇宙学 · 物理学 2022-04-20 Federico De Lillo , Jishnu Suresh , Andrew L. Miller

We propose a method for separating and detecting the non-tensor modes of stochastic gravitational-wave backgrounds (SGWBs) using networks of space-based gravitational-wave detectors. We consider four distinct data-reconstruction schemes for…

广义相对论与量子宇宙学 · 物理学 2026-02-24 Bo Mu , Zong-Kuan Guo

With about a hundred binary black hole (BBH) mergers detected by LIGO-Virgo-KAGRA, and with several hundreds expected in the current O4 run, GWs are revolutionizing our understanding of the universe. Some BBH sources are too faint to be…

广义相对论与量子宇宙学 · 物理学 2024-01-10 Xiao-Xiao Kou , Giacomo Fragione , Vuk Mandic

The recent detection of a stochastic gravitational wave background (SGWB) at nanohertz frequencies by pulsar timing arrays (PTAs) has sparked a flurry of interest. Beyond the standard interpretation that the progenitor is a network of…

宇宙学与河外天体物理 · 物理学 2023-09-06 Bryce Cyr , Thomas Kite , Jens Chluba , J. Colin Hill , Donghui Jeong , Sandeep Kumar Acharya , Boris Bolliet , Subodh P. Patil

A stochastic gravitational-wave background (SGWB) is expected to be produced by the superposition of individually undetectable, unresolved gravitational-wave (GW) signals from cosmological and astrophysical sources. Such a signal can be…

广义相对论与量子宇宙学 · 物理学 2023-05-17 Federico De Lillo , Jishnu Suresh , Antoine Depasse , Magdalena Sieniawska , Andrew L. Miller , Giacomo Bruno

The stochastic gravitational wave background (SGWB) in the nanohertz (nHz) regime, detectable by pulsar timing arrays (PTAs), provides a promising probe of the cosmic population of supermassive black hole binaries (SMBHBs). These binaries…

Stochastic gravitational-wave backgrounds can be of either cosmological or astrophysical origin. The detection of an astrophysical stochastic gravitational-wave background with ground-based interferometers is expected in the near future.…

广义相对论与量子宇宙学 · 物理学 2024-10-01 Haowen Zhong , Bei Zhou , Luca Reali , Emanuele Berti , Vuk Mandic