Eclipsing Light-Curve Asymmetry for Black-Hole Accretion Flows

Details Eclipsing Light-Curve Asymmetry for Black-Hole Accretion Flows Eclipsing Light-Curve Asymmetry for Black-Hole Accretion Flows

2005-07-21

arxiv.org/abs/astro-ph/0507501v1

Astronomy and Astrophysics

Astrophysics

7 pages, 4 figures, PASJ accepted

Scientific paper

We propose an eclipsing light-curve diagnosis for black-hole accretion flows. When emission from an inner accretion disk around a black hole is occulted by a companion star, the observed light curve becomes asymmetric at ingress and egress on a time scale of 0.1-1 seconds. This light-curve analysis provides a means of verifying the relativistic properties of the accretion flow, based on the special/general relativistic effects of black holes. The ``skewness'' for the eclipsing light curve of a thin disk is $\sim 0.08$, whereas that of a slim disk is $\sim 0$, since the innermost part is self-occulted by the disk's outer rim.

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