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

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arxiv 1801.05642 v1 pith:3B4OTLEJ submitted 2018-01-17 astro-ph.SR astro-ph.GA

Benjamin Giesers , Stefan Dreizler , Tim-Oliver Husser , Sebastian Kamann , Guillem Anglada Escude , Jarle Brinchmann , C. Marcella Carollo , Martin M. Roth
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Peter M. Weilbacher Lutz Wisotzki
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classification astro-ph.SRastro-ph.GA
keywords binaryblackglobularholeclusterclustersdetachedfound
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abstract

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 periodogram, we could calculate the orbital parameters and found the companion to be a detached stellar-mass black hole with a minimum mass of 4.36 $\pm$ 0.41 solar masses. The result is an important constraint for binary and black hole evolution models in globular clusters as well as in the context of gravitational wave sources.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Introducing AuriGLOBES: The effects of compressive tides, compact object-induced mass loss, and size evolution on modelling globular clusters

    astro-ph.GA 2026-06 unverdicted novelty 6.0 of 10

    AuriGLOBES is a new subgrid model implemented in Auriga simulations that incorporates compressive tides and compact-object mass loss to transform an initial Schechter mass function into observed globular cluster popul...

  2. Stellar-Mass Black Holes

    astro-ph.HE 2025-07 conditional novelty 1.0 of 10

    A concise review of stellar-mass black hole physics and observations, plus a speculative interstellar mission concept.

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