Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 470, Issue 3, Pages 2611-2616Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx1410
Keywords
astrometry; binaries: general; stars: black holes
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Funding
- Black Hole Initiative
- John Templeton Foundation
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We predict the number of black holes with stellar companions that are potentially detectable with Gaia astrometry over the course of its 5-yr mission. Our model estimates that nearly 2x10(5) astrometric binaries hosting black holes and stellar companions brighter than Gaia's detection threshold, G similar to 20, should be discovered with 5 sigma sensitivity. Among these detectable binaries, systems with longer orbital periods are favoured, and black hole and stellar companion masses in the range M-BH similar to 6-10 M-circle dot and M-* similar to 1-2 M-circle dot, respectively, are expected to dominate.
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