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Title: Numerical relativity estimates of the remnant recoil velocity in binary neutron star mergers

Journal Article · · Physical Review. D.

We present, for the first time, recoil velocity estimates for binary neutron star mergers using data from numerical relativity simulations. We find that binary neutron star merger remnants can have recoil velocity of the order of a few tens of kilometers per second and as high as 150 kilometers per second in our dataset. These recoils are attained due to equivalent contributions from the anisotropic gravitational wave emission as well as the asymmetric ejection of dynamical matter during the merger. Here, we provide fits for net recoil velocity as well as its ejecta component as a function of the amount of ejected matter, which may be useful when constraints on the ejected matter are obtained through electromagnetic observations. We also estimate the mass and spin of the remnants and find them to be in the range [2.34,3.38]M and [0.63, 0.82], respectively, for our dataset.

Research Organization:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)
Grant/Contract Number:
SC0021177; AST-2205920; PHY-2308887; PHY-2011725; PHY-2020275; PHY2116686; AST-2108467
OSTI ID:
2208737
Alternate ID(s):
OSTI ID: 2208874
Journal Information:
Physical Review. D., Vol. 108, Issue 10; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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