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Comment on “A noninteracting low-mass black hole–giant star binary system”

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  • P. J. van den Heuvel, University of Amsterdam
  • ,
  • Thomas M. Tauris

Thompson et al. (Reports, 1 November 2019, p. 637) interpreted the unseen companion of the red giant star 2MASS J05215658+4359220 as most likely a black hole. We argue that if the red giant’s mass is ~1 solar mass, its companion can be a close binary consisting of two main-sequence stars. This would explain why no x-ray emission is detected from the system.

Original languageEnglish
Article numbereaba3282
Number of pages3
Publication statusPublished - May 2020

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