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2003MNRAS.340..543O - Mon. Not. R. Astron. Soc., 340, 543-550 (2003/April-1)
Gamma-ray emission from an accretion flow around a Kerr black hole.
OKA K. and MANMOTO T.
Abstract (from CDS):
As the mechanism of the viscous heating is not well understood, we consider two different proton energy distributions: a relativistic Maxwell-Boltzmann distribution (thermal model) and a power-law distribution (non-thermal model). When the spin parameter is varied from -0.95 to 0.95, the gamma-ray intensity increases by orders of magnitude in the thermal model. Thus, if the proton gas in an ADAF has a thermal distribution, we can consider the gamma-ray spectrum as a probe to investigate the spin parameter of the central black hole. On the other hand, the gamma-ray intensity in the non-thermal model is much less sensitive to the changes in spin parameter than in the thermal model.
Abstract Copyright: 2003 RAS
Journal keyword(s): accretion, accretion discs - black hole physics - Galaxy: centre - gamma-rays: theory
Simbad objects: 2
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