The nearest discovered black hole is likely not in a triple configuration

@article{Safarzadeh2020TheND,
  title={The nearest discovered black hole is likely not in a triple configuration},
  author={M. Safarzadeh and S. Toonen and A. Loeb},
  journal={arXiv: High Energy Astrophysical Phenomena},
  year={2020}
}
HR 6819 was recently claimed to be a hierarchical triple system of a Be star in a wide orbit around an inner binary system of a black hole (BH) and a B III type star. We argue that this system is unlikely to be a hierarchical triple due to three reasons: (i) Given that this system is discovered in a magnitude limited Bright Star Catalog, the expected number of such systems in the Milky Way amounts to about $10^4$ while the estimate for the MW budget for such systems is between $10^2-10^3… Expand
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