Doppler imaging of V404 Cyg in Quiescence
We present Doppler images of the accretion disc in the black hole X-ray transient V404 Cyg during its quiescent phase. The Hα map shows evidence for a hot spot, indicating that mass transfer is continuing long after the 1989 outburst. Both the Hα and the IR CanII emission maps exhibit intense bright spots at the position of the secondary star, which we take as a sign of chromospheric activity. The CanII emission arises from the outer parts of the accretion disc, and its surface brightness distribution is consistent with dwarf novae discs (I ∝ R -3/2).
KeywordsBlack Hole Accretion Disc Radial Velocity Curve Quiescent Phase Secondary Star
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