A detached stellar-mass black hole candidate in the globular cluster NGC 3201

  title={A detached stellar-mass black hole candidate in the globular cluster NGC 3201},
  author={Benjamin Giesers and Stefan Dreizler and T.-O. Husser and Sebastian Kamann and Guillem Anglada Escude and Jarle Brinchmann and C. M. Carollo and Martin M. Roth and Peter M. Weilbacher and Lutz Wisotzki},
  journal={Monthly Notices of the Royal Astronomical Society},
As part of our massive spectroscopic survey of 25 Galactic globular clusters with MUSE, we performed multiple epoch observations of NGC 3201 with the aim of constraining the binary fraction. In this cluster, we found one curious star at the main-sequence turn-off with radial velocity variations of the order of 100 km/s, indicating the membership to a binary system with an unseen component since no other variations appear in the spectra. Using an adapted variant of the generalized Lomb-Scargle… 

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