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The production of a primordial stochastic gravitational-wave background by processes occuring in the early Universe is expected in a broad range of models. Observing this background would open a unique window onto the Universe's…

A detection of the stochastic gravitational-wave background (SGWB) from unresolved compact binary coalescences could be made by Advanced LIGO and Advanced Virgo at their design sensitivities. However, it is possible for magnetic noise that…

广义相对论与量子宇宙学 · 物理学 2020-11-18 Patrick M. Meyers , Katarina Martinovic , Nelson Christensen , Mairi Sakellariadou

The recently reported signal of common red noise between pulsars by several pulsar timing array collaborations has been thought as evidence of the stochastic gravitational wave background (SGWB) due to the Helling-Downs correlation. In this…

广义相对论与量子宇宙学 · 物理学 2025-01-29 Jun-Qian Jiang , Yun-Song Piao

With strong evidence of a common-spectrum stochastic process in the most recent datasets from the NANOGrav Collaboration, the European Pulsar Timing Array (PTA), Parkes PTA, and the International PTA, it is crucial to assess the effects of…

The stochastic gravitational wave background (SGWB) contains a wealth of information on astrophysical and cosmological processes. A major challenge of upcoming years will be to extract the information contained in this background and to…

Pulsar timing arrays have found evidence for a low-frequency gravitational wave background (GWB). Assuming the GWB is produced by supermassive black hole binaries (SMBHBs), the next gravitational wave (GW) signals astronomers anticipate are…

高能天体物理现象 · 物理学 2024-04-24 Emiko C. Gardiner , Luke Zoltan Kelley , Anna-Malin Lemke , Andrea Mitridate

Stochastic gravitational-wave background (SGWB) poses significant challenges for data analysis and parameter inference in future space-based gravitational-wave missions, such as LISA and Taiji, as it appears as an additional stochastic…

广义相对论与量子宇宙学 · 物理学 2025-12-10 Jing-yi Wu , Yong Tang

We integrate the entire, publicly available, Advanced LIGO (ALIGO) data set to obtain maximum-likelihood constraint maps of the Stochastic Gravitational-Wave Background (SGWB). From these we derive limits on the energy density of the…

广义相对论与量子宇宙学 · 物理学 2019-09-25 Arianna Renzini , Carlo Contaldi

We explore the potential of lunar-based gravitational-wave detectors to broaden the multi-messenger astrophysics landscape by detecting mergers of massive ($M_1,M_2 >1 M_\odot$) double white dwarf (WD) binaries. These systems are potential…

高能天体物理现象 · 物理学 2025-08-19 Manuel Pichardo Marcano , Anjali B. Yelikar , Karan Jani

Detecting a stochastic gravitational wave background requires that we first understand and model any astrophysical foregrounds. In the millihertz frequency band, the predominate foreground signal will be from unresolved white dwarf binaries…

广义相对论与量子宇宙学 · 物理学 2014-01-23 Matthew R. Adams , Neil J. Cornish

A stochastic gravitational wave background (SGWB) will affect the CMB anisotropies via weak lensing. Unlike weak lensing due to large scale structure which only deflects photon trajectories, a SGWB has an additional effect of rotating the…

宇宙学与河外天体物理 · 物理学 2016-09-21 Shabbir Shaikh , Suvodip Mukherjee , Aditya Rotti , Tarun Souradeep

The astrophysical Stochastic Gravitational Wave Background (SGWB) originates from the mergers of compact binary objects that are otherwise undetected as individual events, along with other sources such as supernovae, magnetars, etc. The…

广义相对论与量子宇宙学 · 物理学 2023-11-01 Mohit Raj Sah , Suvodip Mukherjee

We consider an anisotropic search for the stochastic gravitational-wave (GW) background by decomposing the gravitational-wave sky into its spherical harmonics components. Previous analyses have used the diffraction limit to define the…

天体物理仪器与方法 · 物理学 2022-07-20 Erik Floden , Vuk Mandic , Andrew Matas , Leo Tsukada

Scalar-Induced Gravitational Waves (SIGWs), second-order tensor modes sourced by first-order scalar fluctuations in General Relativity (GR), are expected to contribute to the Stochastic Gravitational Wave Background (SGWB) potentially…

广义相对论与量子宇宙学 · 物理学 2025-07-11 Anjali Abirami Kugarajh , Marisol Traforetti , Andrea Maselli , Sabino Matarrese , Angelo Ricciardone

The stochastic cosmological gravitational-wave background (CGWB) provides a direct window to study early universe phenomena and fundamental physics. With the proposed third-generation ground-based gravitational wave detectors, Einstein…

广义相对论与量子宇宙学 · 物理学 2020-09-16 Ashish Sharma , Jan Harms

Future space-based gravitational-wave detectors such as TianQin, LISA, and Taiji are expected to conduct joint observations. Such a multi-detector network will provide complementary viewing angles for the anisotropic stochastic…

广义相对论与量子宇宙学 · 物理学 2025-10-31 Zhi-Yuan Li , Zheng-Cheng Liang , Cong-mao Zhang , Jian-dong Zhang , Yi-Ming Hu

Gravitational wave (GW) astrophysics is entering a multi-band era with upcoming GW detectors, enabling detailed mapping of the stochastic GW background across vast frequencies. We highlight this potential via a new physics scenario: hybrid…

广义相对论与量子宇宙学 · 物理学 2025-11-26 Yunjia Bao , Tore Boybeyi , Vuk Mandic , Lian-Tao Wang

Detecting stochastic gravitational wave backgrounds (SGWBs) with The Laser Interferometer Space Antenna (LISA) is among the mission science objectives. Disentangling SGWBs of astrophysical and cosmological origin is a challenging task,…

宇宙学与河外天体物理 · 物理学 2024-05-14 Federico Pozzoli , Riccardo Buscicchio , Christopher J. Moore , Francesco Haardt , Alberto Sesana

Third-generation ground-based gravitational wave detectors are expected to observe $\mathcal{O}(10^5)$ of overlapping signals per year from a multitude of astrophysical sources that will be computationally challenging to resolve…

广义相对论与量子宇宙学 · 物理学 2025-10-15 G. Giarda , A. I. Renzini , C. Pacilio , D. Gerosa

We explore the possibility that domain wall networks generate the stochastic gravitational wave background (SGWB) observed as a strong common power-law process in the Data Release-2 of Parkes Pulsar Timing Array. We find that a broad range…

高能物理 - 唯象学 · 物理学 2024-09-05 Ligong Bian , Shuailiang Ge , Changhong Li , Jing Shu , Junchao Zong