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Title:
On the nature of the globular cluster X-ray sources
Authors:
Silk, J.; Arons, J.
Affiliation:
AA(California, University, Berkeley, Calif.), AB(California, University, Berkeley, Calif.)
Publication:
Astrophysical Journal, vol. 200, Sept. 15, 1975, pt. 2, p. L131-L135. (ApJL Homepage)
Publication Date:
09/1975
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Black Holes (Astronomy), Globular Clusters, Stellar Evolution, X Ray Sources, Capture Effect, Nuclear Reactions, Stellar Mass
DOI:
10.1086/181914
Bibliographic Code:
1975ApJ...200L.131S

Abstract

It is suggested that the globular cluster X-ray sources can be interpreted in terms of mass shed by evolving postmain-sequence stars in the central regions of the globular cluster and accreting onto a massive (approximately 100-1000 solar masses) central black hole. Tentative indications that support this hypothesis include the high central escape velocities and the distribution of metallicities among the four globular clusters containing luminous X-ray sources. We argue that these X-ray sources cannot be explained as a consequence of the close capture of a nuclear burning star by a compact stellar remnant.

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