Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.1110t&link_type=abstract
American Astronomical Society, HEAD meeting #11, #11.10; Bulletin of the American Astronomical Society, Vol. 41, p.672
Astronomy and Astrophysics
Astronomy
Scientific paper
Most black hole binaries show large changes in X-ray luminosity caused primarily by variations in mass accretion rate. An important question for understanding black hole accretion and jet production is whether the inner edge of the accretion disk recedes at low accretion rate. Recently, significant work has gone into addressing this question using measurements of iron Kalpha emission lines that arise due to fluorescence of iron in the disk as well as soft X-ray observations of thermal disk components. In this presentation, we discuss these recent efforts, including our result that the iron line detected for GX 339-4 at 0.14% of the Eddington luminosity indicates that the inner disk radius increases by a factor of >27 over the value found when GX 339-4 was bright.
JAT acknowledges partial support from NASA Suzaku GO grant NNX09AG46G. EK acknowledges TUBITAK grant 106T570 and the Turkish Academy of Sciences. EK and SC acknowledge the EU FP7 ITN "Black Hole Universe."
Corbel Sephane
Kaaret Phil
Kalemci Emrah
Migliari Simone
Tomsick John
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