期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 502, 期 1, 页码 L16-L20出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnrasl/slaa205
关键词
dark matter; gravitational lensing: strong; gravitational waves
资金
- National Key Research and Development Program of China [2017YFA0402600]
- National Natural Science Foundation of China [12021003, 11690023, 11633001, 11373014]
- Beijing Talents Fund of Organization Department of Beijing Municipal Committee of the CPC
- Chinese Academy of Sciences [XDB23000000]
- Interdiscipline Research Funds of Beijing Normal University
- Opening Project of Key Laboratory of Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences
- Foreign Talent Introducing Project and Special Fund Support of Foreign Knowledge Introducing Project in China
- Key Foreign Expert Program for the Central Universities [X2018002]
A new strategy proposed in the study suggests examining the fluid shear viscosity of dark matter through the observation of gravitational waves, with potential success in detecting dark matter self-interactions on scales of galaxies and clusters using future ground-based Einstein Telescope and satellite GW observatory.
Based on the strongly lensed gravitational waves (GWs) from compact binary coalescence, we propose a new strategy to examine the fluid shear viscosity of dark matter (DM) in the GW domain, i.e. whether a GW experiences the damping effect when it propagates in DM fluid with nonzero shear viscosity. By assuming that the DM self-scatterings are efficient enough for the hydrodynamic description to be valid, our results demonstrate that future ground-based Einstein Telescope and satellite GW observatory (big bang observer) may succeed in detecting any DM self-interactions at the scales of galaxies and clusters.
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