Projects per year
Abstract
The Laser Interferometer Gravitational-Wave Observatory (LIGO)-Virgo collaboration recently reported the properties of GW190412, a binary black hole merger with unequal component masses (mass ratio 0.25-0.04+0.06 when using the EOBNR PHM approximant) and a non-vanishing effective spin aligned with the orbital angular momentum. They used uninformative priors to infer that the more massive black hole had a dimensionless spin magnitude between 0.17 and 0.59 at 90% confidence. We argue that, within the context of isolated binary evolution, it is more natural to assume a priori that the first-born, more massive black hole has a negligible spin, while the spin of the less massive black hole is preferentially aligned with the orbital angular momentum if it is spun up by tides. Under this astrophysically motivated prior, we conclude that the lower mass black hole had a dimensionless spin component between 0.64 and 0.99 along the orbital angular momentum.
Original language | English |
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Article number | L28 |
Number of pages | 6 |
Journal | The Astrophysical Journal Letters |
Volume | 895 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Jun 2020 |
Projects
- 1 Finished
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ARC Centre of Excellence for Gravitational Wave Discovery
Bailes, M. (Primary Chief Investigator (PCI)), McClelland, D. E. (Chief Investigator (CI)), Levin, Y. (Chief Investigator (CI)), Blair, D. G. (Chief Investigator (CI)), Scott, S. M. (Chief Investigator (CI)), Ottaway, D. J. (Chief Investigator (CI)), Melatos, A. (Chief Investigator (CI)), Veitch, P. J. (Chief Investigator (CI)), Wen, L. (Chief Investigator (CI)), Shaddock, D. A. (Chief Investigator (CI)), Slagmolen, B. J. J. (Chief Investigator (CI)), Zhao, C. (Chief Investigator (CI)), Evans, R. J. (Chief Investigator (CI)), Ju, L. (Chief Investigator (CI)), Galloway, D. (Chief Investigator (CI)), Thrane, E. (Chief Investigator (CI)), Hurley, J. R. (Chief Investigator (CI)), Coward, D. M. (Chief Investigator (CI)), Cooke, J. (Chief Investigator (CI)), Couch, W. (Partner Investigator (PI)), Hobbs, G. B. (Partner Investigator (PI)), Reitze, D. (Partner Investigator (PI)), Rowan, S. (Partner Investigator (PI)), Cai, R. (Partner Investigator (PI)), Adhikari, R. X. (Partner Investigator (PI)), Danzmann, K. (Partner Investigator (PI)), Mavalvala, N. (Partner Investigator (PI)), Kulkarni, S. R. (Partner Investigator (PI)), Kramer, M. (Partner Investigator (PI)), Branchesi, M. (Partner Investigator (PI)), Gehrels, N. (Partner Investigator (PI)), Weinstein, A. J. R. (Partner Investigator (PI)), Steeghs, D. (Partner Investigator (PI)), Bock, D. (Partner Investigator (PI)) & Lasky, P. (Chief Investigator (CI))
Monash University – Internal University Contribution, Monash University – Internal Department Contribution
1/01/17 → 31/03/24
Project: Research