Ultraviolet Observations of the X‐Ray Photoionized Wind of Cygnus X‐1 during X‐Ray Soft/High State1
Ultraviolet Observations of the X‐Ray Photoionized Wind of Cygnus X‐1 during X‐Ray Soft/High State1
High-resolution ultraviolet observations of Cygnus X-1 were obtained at two epochs roughly 1 year apart using the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. Orbital phase ranges around ϕorb = 0 and 0.5 were covered at each epoch, and the spectra show P Cygni line features from high …