GW190412: observation of a binary-black-hole coalescence with asymmetric masses

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dc.contributor.author Sengupta, Anand S. et al.
dc.date.accessioned 2020-09-21T14:18:37Z
dc.date.available 2020-09-21T14:18:37Z
dc.date.issued 2020-08
dc.identifier.citation Sengupta, Anand S. et al., "GW190412: observation of a binary-black-hole coalescence with asymmetric masses", Physical Review D, DOI: 10.1103/PhysRevD.102.043015, vol. 102, no. 4, Aug. 2020. en_US
dc.identifier.issn 2470-0010
dc.identifier.issn 2470-0029
dc.identifier.uri 10.1103/PhysRevD.102.043015
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5714
dc.description.abstract We report the observation of gravitational waves from a binary-black-hole coalescence during the first two weeks of LIGO's and Virgo's third observing run. The signal was recorded on April 12, 2019 at 05?30?44 UTC with a network signal-to-noise ratio of 19. The binary is different from observations during the first two observing runs most notably due to its asymmetric masses: a ?30?M? black hole merged with a ?8 M? black hole companion. The more massive black hole rotated with a dimensionless spin magnitude between 0.22 and 0.60 (90% probability). Asymmetric systems are predicted to emit gravitational waves with stronger contributions from higher multipoles, and indeed we find strong evidence for gravitational radiation beyond the leading quadrupolar order in the observed signal. A suite of tests performed on GW190412 indicates consistency with Einstein's general theory of relativity. While the mass ratio of this system differs from all previous detections, we show that it is consistent with the population model of stellar binary black holes inferred from the first two observing runs.
dc.description.statementofresponsibility by Anand S. Sengupta et al.
dc.language.iso en_US en_US
dc.publisher American Physical Society en_US
dc.subject Gravitational wave detection en_US
dc.subject Gravitational wave sources en_US
dc.subject Gravitational waves en_US
dc.subject Gravitation, Cosmology & Astrophysics en_US
dc.title GW190412: observation of a binary-black-hole coalescence with asymmetric masses en_US
dc.type Article en_US
dc.relation.journal Physical Review D


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