X-ray Reeection in Galactic Black Hole Candidates: Smeared Edge Prooles and Resonant Auger Destruction

We consider the spectra of Thomson-thick, geometrically-thin accretion discs around Galactic black hole candidates in the reeection model and compute their iron K edges and iron K lines. We compare the smeared iron K edge prooles that we compute with observation and nd them to be a satisfactory description of the data. We nd that a combination of Doppler broadening and resonant Auger destruction of line photons can make iron K lines very diicult to detect in highly ionized inclined discs. We detail the physics of resonant Auger destruction at the level it is currently understood and point out its implications.