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Spectral Transitions in Cygnus X‐1 and Other Black Hole X‐Ray Binaries

1998; IOP Publishing; Volume: 505; Issue: 2 Linguagem: Inglês

10.1086/306186

1538-4357

Ann A. Esin, Ramesh Narayan, Wei Cui, J. E. Grove, Shuang‐Nan Zhang,

Astrophysics and Cosmic Phenomena

We show that the model proposed by Esin, McClintock, & Narayan for the low state, intermediate state, and high state of the black hole soft X-ray transient, Nova Muscae 1991, is consistent with the spectral evolution of the black hole X-ray binary, Cyg X-1, during the hard-to-soft state transition observed in 1996. We also apply the model to the outbursts of two other black hole X-ray transients, GRO J0422+32 and GRO J1719-24.