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Eclipsing Light-Curve Asymmetry for Black-Hole Accretion Flows

Ken-ya Watarai·Rohta Takahashi·Jun Fukue
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Abstract

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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Ken-ya Watarai, Rohta Takahashi, Jun Fukue. 2005-07-21. Eclipsing Light-Curve Asymmetry for Black-Hole Accretion Flows. https://doi.org/10.1093/pasj%2F57.5.827

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