Search For A Black Hole Horizon Signature In X-ray Spectra Of Galactic Bhc With Rxte

Details Search For A Black Hole Horizon Signature In X-ray Spectra Of Galactic Bhc With Rxte Search For A Black Hole Horizon Signature In X-ray Spectra Of Galactic Bhc With Rxte

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21430404s&link_type=abstract

American Astronomical Society, AAS Meeting #214, #304.04; Bulletin of the American Astronomical Society, Vol. 41, p.721

Astronomy and Astrophysics

Astronomy

Scientific paper

We study the evolution of energy spectrum of Galactic Black Hole X-ray binaries in order to search for possible signatures of BH horizon. We find that the saturation of the photon index of the non-thermal spectral component is observed during BH state transitions from low-hard to high-soft states in agreement with the Bulk Motion Comptonization model. We present observational and theoretical arguments that the index saturation effect is a black hole horizon signature.

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