articleMonthly Notices of the Royal Astronomical SocietyFeb 17, 2016BRONZE OA

Merging binary black holes formed through chemically homogeneous evolution in short-period stellar binaries

IMIlya MandelSES. E. de Mink

University of Birmingham · The Netherlands Cancer Institute · +1 more institution

Indexed inarxivcrossrefdoaj

Abstract

We explore a newly proposed channel to create binary black holes of stellar origin. This scenario applies to massive, tight binaries where mixing induced by rotation and tides transports the products of hydrogen burning throughout the stellar envelopes. This slowly enriches the entire star with helium, preventing the build-up of an internal chemical gradient. The stars remain compact as they evolve nearly chemically homogeneously, eventually forming two black holes, which we estimate typically merge 4–11 Gyr after formation. Like other proposed channels, this evolutionary pathway suffers from significant theoretical uncertainties, but could be constrained in the near future by data from advanced ground-based…

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Topics & keywords

Topics
Keywords
  • Physics
  • Astrophysics
  • Common envelope
  • Binary black hole
  • Stellar evolution
  • Gravitational wave
  • Binary number
  • COSMIC cancer database
UN Sustainable Development Goals
  • Life below water
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