@article{ceb8b6f537794b0482017ea8ce11b0d8,

title = "GW190412: Observation of a Binary-Black-Hole Coalescence with Asymmetric Masses",

abstract = "We report the observation of gravitational waves from a binary-black-hole coalescence during the first two weeks of LIGO{\textquoteright}s and Virgo{\textquoteright}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 0.17 and 0.59 (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{\textquoteright}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.",

author = "{ligo Scientific Collaboration} and {Virgo Collaboration} and R. Abbott and Abbott, {T. D.} and S. Abraham and F. Acernese and K. Ackley and C. Adams and Adhikari, {R. X.} and Adya, {V. B.} and C. Affeldt and M. Agathos and K. Agatsuma and N. Aggarwal and Aguiar, {O. D.} and A. Aich and L. Aiello and A. Ain and P. Ajith and S. Akcay and G. Allen and A. Allocca and Altin, {P. A.} and A. Amato and S. Anand and A. Ananyeva and Anderson, {S. B.} and Anderson, {W. G.} and Angelova, {S. V.} and S. Ansoldi and S. Antier and S. Appert and K. Arai and Araya, {M. C.} and Areeda, {J. S.} and M. Ar{\`e}ne and N. Arnaud and Aronson, {S. M.} and Arun, {K. G.} and Y. Asali and S. Ascenzi and G. Ashton and Aston, {S. M.} and P. Astone and F. Aubin and P. Aufmuth and K. AultONeal and C. Austin and V. Avendano and Berry, {C. P.L.} and V. Kalogera and Shahriar, {M. S.}",

note = "Publisher Copyright: Copyright {\textcopyright} 2020, The Authors. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

month = apr,

day = "17",

language = "English (US)",

journal = "Free Radical Biology and Medicine",

issn = "0891-5849",

publisher = "Elsevier Inc.",

}