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

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Abbott, R. and Angelova, S. V. and Macfoy, S. and Reid, S., LIGO Scientific Collaboration and Virgo Collaboration (2020) GW190412 : Observation of a binary-black-hole coalescence with asymmetric masses. Physical Review D, 102 (4). 043015. ISSN 1550-2368 (https://doi.org/10.1103/PhysRevD.102.043015)

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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.

  • Item type:Article
    ID code:74605
    Dates:
    Date
    Event
    24 August 2020
    Published
    30 June 2020
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Engineering > Biomedical Engineering
    Depositing user: Pure Administrator
    Date deposited:16 Nov 2020 12:48
    Last modified:11 Dec 2024 20:31
    URI:https://strathprints.strath.ac.uk/id/eprint/74605
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