GW190425: Observation of a Compact Binary Coalescence with Total Mass ∼ 3.4 M o

Abbott, B P and Abbott, R and Abbott, T D and Somala, S N and et al, . (2020) GW190425: Observation of a Compact Binary Coalescence with Total Mass ∼ 3.4 M o. Astrophysical Journal Letters, 892 (L3). ISSN 2041-8205

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Abstract

On 2019 April 25, the LIGO Livingston detector observed a compact binary coalescence with signal-to-noise ratio 12.9. The Virgo detector was also taking data that did not contribute to detection due to a low signal-to-noise ratio, but were used for subsequent parameter estimation. The 90% credible intervals for the component masses range from to if we restrict the dimensionless component spin magnitudes to be smaller than 0.05). These mass parameters are consistent with the individual binary components being neutron stars. However, both the source-frame chirp mass and the total mass of this system are significantly larger than those of any other known binary neutron star (BNS) system. The possibility that one or both binary components of the system are black holes cannot be ruled out from gravitational-wave data. We discuss possible origins of the system based on its inconsistency with the known Galactic BNS population. Under the assumption that the signal was produced by a BNS coalescence, the local rate of neutron star mergers is updated to 250-2810.

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IITH Creators:
IITH CreatorsORCiD
Somala, S NUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Neutron Stars, LIGO (Observatory), Gravitational Waves
Subjects: Civil Engineering > Geosystems
Civil Engineering > Earthquake Engineering
Divisions: Department of Civil Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 24 Mar 2021 10:32
Last Modified: 24 Mar 2021 10:32
URI: http://raiith.iith.ac.in/id/eprint/7717
Publisher URL: https://doi.org/10.3847/2041-8213/ab75f5
OA policy: https://v2.sherpa.ac.uk/id/publication/6402
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