2 papers
astro-ph1997
Cygnus X-1: X-ray Emission Mechanism and Geometry
Wei Cui, S. N. Zhang, J. H. Swank +3
We summarize recent observations of Cyg X-1 during its 1996 state transition. The results favor an emission geometry with a central optically thin corona surrounded by an optically…
astro-ph1997
Modeling the Hard X-Ray Lag and Energy Spectrum of Cyg X-1
Xin-Min Hua, Demosthenes Kazanas, Wei Cui
In an effort to model the observed energy spectrum of Cygnus X-1 as well as its hard X-ray lag by Comptonization in inhomogeneous clouds of hot electrons with spherical geometry an…