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Radiation Transport Around Kerr Black Holes Jeremy David ...

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5.4. OBSERVED SPECTRUM OF THE DISK 155<br />

rotational instability as the driving force behind angular momentum transport in the<br />

disk, especially the inner regions where the majority of energy is released.<br />

Furthermore, to completely match the X-ray spectra from black holes in the<br />

Thermal-Dominant state, one must also include a small high-energy power-law component<br />

(McClintock & Remillard, 2004). It is likely that this high-energy tail is<br />

caused by the Compton upscattering of thermal photons through a hot, low-density<br />

electron corona above the disk. In the next Chapter, we introduce a Monte-Carlo<br />

code to calculate the effect of this scattering on the continuum photon spectra.

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