The evolutionary status of the black hole candidate V404 Cygni

Details The evolutionary status of the black hole candidate V404 Cygni The evolutionary status of the black hole candidate V404 Cygni

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.260l...5k&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 260, no. 2, p. L5, L6.

Astronomy and Astrophysics

Astronomy

44

Binary Stars, Black Holes (Astronomy), Mass Transfer, Stellar Mass, Stellar Mass Accretion, X Ray Stars, Companion Stars, Roche Limit, Stellar Luminosity, X Ray Astronomy

Scientific paper

I show that the black hole candidate system V404 Cygni conforms to a simple picture of 'stripped-giant' evolution, in which an evolved secondary star of core mass Mc of about 0.20-0.22 solar mass overflows its Roche lobe. The predicted absolute magnitudes for this star give system distances of 3.5-5.1 kpc and peak X-ray luminosities of about 1.8-3.75 x 10 exp 39 erg/s. The mass-transfer rates predicted by the evolutionary picture agree well with X-ray observations.

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