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1811092806971686912
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MIT
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© 2020. The Author(s). Published by the American Astronomical Society.. 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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2024-09-23T15:25:45Z
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Article
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mit-1721.1/132424
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Massachusetts Institute of Technology
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English
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2024-09-23T15:25:45Z
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2021
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American Astronomical Society
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dspace
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| spelling |
mit-1721.1/1324242022-10-02T02:42:32Z GW190425: Observation of a Compact Binary Coalescence with Total Mass ∼ 3.4 M ⊙ © 2020. The Author(s). Published by the American Astronomical Society.. 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. 2021-09-20T18:22:19Z 2021-09-20T18:22:19Z 2020 2020-10-21T16:57:06Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/132424 en 10.3847/2041-8213/AB75F5 Astrophysical Journal Letters Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf American Astronomical Society The American Astronomical Society
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| spellingShingle |
GW190425: Observation of a Compact Binary Coalescence with Total Mass ∼ 3.4 M ⊙
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| title |
GW190425: Observation of a Compact Binary Coalescence with Total Mass ∼ 3.4 M ⊙
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| title_full |
GW190425: Observation of a Compact Binary Coalescence with Total Mass ∼ 3.4 M ⊙
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| title_fullStr |
GW190425: Observation of a Compact Binary Coalescence with Total Mass ∼ 3.4 M ⊙
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| title_full_unstemmed |
GW190425: Observation of a Compact Binary Coalescence with Total Mass ∼ 3.4 M ⊙
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| title_short |
GW190425: Observation of a Compact Binary Coalescence with Total Mass ∼ 3.4 M ⊙
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| title_sort |
gw190425 observation of a compact binary coalescence with total mass ∼ 3 4 m ⊙
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| url |
https://hdl.handle.net/1721.1/132424
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