GW190425: Observation of a Compact Binary Coalescence with Total Mass similar to 3.4 M-circle dot
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摘要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 from1.12 to 2.52 M-circle dot (1.46-1.87 M-circle dot 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 1.44(-0.02)(+0.02) M-circle dot. and the total mass 3.4(-0.1)(+0.3) M-circle dot. 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 Gpc(-3) yr(-1).
著者B. P. Abbott et al
期刊名稱Astrophysical Journal Letters
出版年份2020
月份3
日期20
卷號892
期次1
出版社IOP PUBLISHING LTD
文章號碼L3
國際標準期刊號2041-8205
電子國際標準期刊號2041-8213
語言英式英語
Web of Science 學科類別Astronomy & Astrophysics;Astronomy & Astrophysics

上次更新時間 2021-14-06 於 00:03