Stellar Wind Variations during the X‐Ray High and Low States of Cygnus X‐11,2
Stellar Wind Variations during the X‐Ray High and Low States of Cygnus X‐11,2
We present results from Hubble Space Telescope ultraviolet spectroscopy of the massive X-ray and black hole binary system, HD 226868 = Cyg X-1. The spectra were obtained at both orbital conjunction phases in 2002 and 2003, when the system was in the X-ray high/soft state. The UV stellar wind lines …