The Black Hole Binary A0620-00
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 (3σ) 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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 1986
- DOI:
- 10.1086/164482
- Bibcode:
- 1986ApJ...308..110M
- Keywords:
-
- Astronomical Photometry;
- Black Holes (Astronomy);
- Dwarf Stars;
- X Ray Binaries;
- Companion Stars;
- K Stars;
- Mass To Light Ratios;
- Mass Transfer;
- Radial Velocity;
- Astrophysics;
- BLACK HOLES;
- STARS: INDIVIDUAL ALPHANUMERIC: A0620-00;
- X-RAYS: BINARIES