Spatial and Binary Parameter Distributions of Black Hole Binaries in the Milky Way Detectable with Gaia

Abstract

Soon after the Gaia data release (DR) 3 in June 2022, some candidates (and one confirmed) of detached black hole (BH) - luminous companion (LC) binaries have been reported. Existing and future detections of astrometric BH-LC binaries will shed light on the spatial distribution of these systems, which can deepen our understanding of the natal kicks and the underlying formation mechanism of BHs. By tracking Galactic orbits of BH-LC binaries obtained from BSE, we find that distributions of BH mass and the height from the Galactic plane |z| would help us give a constraint on supernova model. We also indicate that the correlations of (i) orbital periods and eccentricities, and (ii) BH mass and $|z|$ could be clues for the strength of natal kick, and that the correlations of ($P$, $Z/Z_{\odot }$) may tell us a clue for common envelope (CE) efficiency. We also discuss the possibility of forming BH-LC binaries like the BH binary candidates reported in Gaia DR3 and Gaia BH 1, finding that if the candidates as well as the confirmed binary originate from isolated binaries, they favor models which produce low-mass BHs and have high CE efficiencies exceeding unity.

25 pages, 17 figures. Accepted by ApJ

References in corpus (18)

• The Gaia mission
• Binary interaction dominates the evolution of massive stars
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• The Structure of the Milky Way's Bar Outside the Bulge
• Gaia Data Release 3: Stellar multiplicity, a teaser for the hidden treasure
• A Sun-like star orbiting a black hole
• Revealing black holes with Gaia
• Hunting Black Holes with Gaia
• Triage of the Gaia DR3 astrometric orbits. I. A sample of binaries with probable compact companions
• Search for a Black Hole Binary in Gaia DR3 Astrometric Binary Stars with Spectroscopic Data
• Gaia May Detect Hundreds of Well-characterised Stellar Black Holes
• Gravitational wave sources in our Galactic backyard: Predictions for BHBH, BHNS and NSNS binaries detectable with LISA
• A two-stage formalism for common-envelope phases of massive stars
• Population Synthesis of Black Hole Binaries with Normal-Star Companions: I. Detached Systems
• The observed mass distribution of Galactic black hole LMXBs is biased against massive black holes
• What are the spectroscopic binaries with high mass functions near the Gaia DR3 main sequence?
• Gaia Data Release 3: Ellipsoidal Variables with Possible Black-Hole or Neutron Star secondaries
• Detectablity of Black Hole Binaries with Gaia: Dependence on Binary Evolution Models

Cited by in corpus (2)

• The boring history of Gaia BH3 from isolated binary evolution
• An upper limit on the frequency of short-period black hole companions to Sun-like stars