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2000MNRAS.317..528W - Mon. Not. R. Astron. Soc., 317, 528-534 (2000/September-3)
A TiO study of the black hole binary GRO J0422+32 in a very low state.
WEBB N.A., NAYLOR T., IOANNOU Z., CHARLES P.A. and SHAHBAZ T.
Abstract (from CDS):
We see some evidence for an ellipsoidal modulation, from which we determine the orbital inclination of J0422+32 to be less than 45°. We therefore calculate a minimum mass for the primary of 2.22M☉, consistent with a black hole, but not necessarily the supermassive one proposed recently (1997) by Beekman et al. We obtain an M4-5 spectral type for the secondary star, and determine that the secondary contributes 38±2per cent of the flux that we observe from J0422+32 over the range 6950-8400Å. From this we calculate the distance to the system to be 1.39±0.15kpc.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): accretion, accretion discs - black hole physics - binaries: close - stars: fundamental parameters - stars: individual: GRO J0422+32 - stars: late-type MNRAS.276....1
Simbad objects: 8
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