Stochastic Gravitational Wave Background from Cosmological Neutrino-dominated Accretion Flows
Year: 2024
Type: article
Abstract: We investigate the stochastic gravitational wave background (SGWB) from neutrino-dominated accretion flows (NDAFs) based on the results of our fallback core-collapse supernova (CCSN) simulations. We find that the predicted SGWB is mainly determined by the typical CCSN initial explosion energy and progenitor metallicity. For the optimistic cases in which the typical initial explosion energy is low, the SGWB from NDAFs without disk outflows might be detected by next-generation space-based interferometers such as DECi-hertz Interferometer Gravitational wave Observatory and Big Bang Observer. In the low-frequency regime ∼10−3–10−1 Hz, this background is comparable to that expected from standard inflationary models. Therefore, the SGWB from NDAFs may become a foreground for research of the SGWB generated in the inflationary epoch. Combining the diffuse NDAF neutrino background and SGWB from NDAFs, one may constrain the properties of the CCSNe and NDAFs.
Source: The Astrophysical Journal
Authors: Yun-Feng Wei, Tong Liu
Institution: Xiamen University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
OpenAlex ID: W4402279819