title: Formation of the first three gravitational-wave observations through isolated binary evolution.
abstract: During its first four months of taking data, Advanced LIGO has detected gravitational waves from two binary black hole mergers, GW150914 and GW151226, along with the statistically less significant binary black hole merger candidate LVT151012. Here we use the rapid binary population synthesis code COMPAS to show that all three events can be explained by a single evolutionary channel-classical isolated binary evolution via mass transfer including a common envelope phase. We show all three events could have formed in low-metallicity environments (Z=0.001) from progenitor binaries with typical total masses ≳160M⊙, ≳60M⊙and ≳90M⊙, for GW150914, GW151226 and LVT151012, respectively.
authors.affiliation: School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, UK.
authors.forename: Simon
authors.identifier: 0000-0002-6100-537X
authors.initials: S
authors.lastname: Stevenson
authors.affiliation: School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, UK.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Vigna-Gómez
authors.affiliation: School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, UK.
authors.forename: Ilya
authors.initials: I
authors.lastname: Mandel
authors.affiliation: School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, UK.
authors.forename: Jim W
authors.initials: JW
authors.lastname: Barrett
authors.affiliation: School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, UK.
authors.forename: Coenraad J
authors.initials: CJ
authors.lastname: Neijssel
authors.affiliation: School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, West Midlands B15 2TT, UK.
authors.forename: David
authors.initials: D
authors.lastname: Perkins
authors.affiliation: Anton Pannekoek Institute for Astronomy, University of Amsterdam, 1090 GE Amsterdam, The Netherlands.
authors.forename: Selma E
authors.initials: SE
authors.lastname: de Mink