The optical emission lines as a probe of state transitions in black-hole candidates

Details The optical emission lines as a probe of state transitions in black-hole candidates The optical emission lines as a probe of state transitions in black-hole candidates

2001-01-17

arxiv.org/abs/astro-ph/0101305v1

Astronomy and Astrophysics

Astrophysics

Talk presented at the IX Marcel Grossmann Meeting, Rome 2000--to appear in the Conference proceedings

Scientific paper

Optical spectroscopic studies of emission lines in black-hole candidates can help us investigate state transitions in those systems. Changes in the optical line profiles reflect changes in the geometry of the accretion flow, usually associated with X-ray state transitions in the inner region. We identify at least four optical states in the black-hole candidate GRO J1655-40 in outburst, and two optical states in GX339-4.

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