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Title:
The black hole binary A0620-00
Authors:
McClintock, J. E.; Remillard, R. A.
Affiliation:
AA(MIT; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AB(MIT, Cambridge, MA)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 308, Sept. 1, 1986, p. 110-122. (ApJ Homepage)
Publication Date:
09/1986
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Photometry, Black Holes (Astronomy), Dwarf Stars, X Ray Binaries, Companion Stars, K Stars, Mass To Light Ratios, Mass Transfer, Radial Velocity
DOI:
10.1086/164482
Bibliographic Code:
1986ApJ...308..110M

Abstract

Photometric and spectroscopic observations of the X-ray nova A 0620-00 in quiescence during 1981 - 1985 are presented. These data are used to derive a precise value for the binary period, the radial velocity curve of the K-dwarf companion, and a Doppler-corrected spectrum of the companion which reveals the presence of narrow absorption lines. The mass function of the system is f(M) = 3.18±0.16 M_sun;. A firm lower limit (3sigma) to the mass of the compact X-ray source is 3.20 M_sun;; this value exceeds the maximum allowed mass of a stable neutron star.

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