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C.S. Reynolds (University of Maryland, College Park)
Accreting black holes are prodigious sources of hard X-rays, supporting the notion that these objects support powerful coronae. I will discuss the constraints on the nature of these coronae that arise from modern spectral and timing X-ray observations. A particularly powerful probe are the relativistically broadened iron fluorescent lines observed in these systems; observations of these spectral features suggest the existence of extremely compact coronae very close to the black hole event horizon. Evidence for disk-corona coupling from observations of quasi-periodic oscillations will also be discussed.
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Bulletin of the American Astronomical Society, 36 #2
© YEAR. The American Astronomical Soceity.