Revealing Black Holes with Gaia

Katelyn Breivik, Sourav Chatterjee, Shane L. Larson

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

We estimate the population of black holes with luminous stellar companions (BH-LCs) in the Milky Way (MW) observable by Gaia. We evolve a realistic distribution of BH-LC progenitors from zero-age to the current epoch taking into account relevant physics, including binary stellar evolution, BH-formation physics, and star formation rate, in order to estimate the BH-LC population in the MW today. We predict that Gaia will discover between 3800 and 12,000 BH-LCs by the end of its mission, depending on BH natal kick strength and observability constraints. We find that the overall yield, and distributions of eccentricities and masses of observed BH-LCs, can provide important constraints on the strength of BH natal kicks. Gaia-detected BH-LCs are expected to have very different orbital properties compared to those detectable via radio, X-ray, or gravitational-wave observations.

Original languageEnglish (US)
Article numberL13
JournalAstrophysical Journal Letters
Volume850
Issue number1
DOIs
StatePublished - Nov 20 2017

Keywords

  • Galaxy: stellar content
  • astrometry
  • methods: numerical
  • methods: statistical
  • stars: black holes
  • stars: statistics

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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