On The Stable Inner-disk Radius Of BH LMC X-3

Details On The Stable Inner-disk Radius Of BH LMC X-3 On The Stable Inner-disk Radius Of BH LMC X-3

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.2103s&link_type=abstract

American Astronomical Society, HEAD meeting #11, #21.03; Bulletin of the American Astronomical Society, Vol. 41, p.692

Astronomy and Astrophysics

Astronomy

Scientific paper

The black-hole binary system LMC X-3 has been observed by virtually every X-ray satellite since the inception of X-ray astronomy. Among the persistently active Galactic black holes, LMC X-3 is uniquely both habitually soft and highly variable. Using a fully relativistic accretion-disk model, we analyze spectral data spanning 25 years collected from seven X-ray missions and show that consistent measurements of the accretion-disk inner radius are obtained to within a few percent. This study represents the strongest possible evidence for the existence of a stable inner-disk radius, which is presumably tied to the innermost stable circular orbit (ISCO) that is predicted by general relativity. Our findings establish a firm foundation for the measurement of black-hole spin.

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