158 citations · 1.1k across the 34 of their papers we have counts for
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astro-ph2001★ 15 cited
Secular and orbital variability of Cir X-1 observed in optical spectra
Helen M. Johnston, Kinwah Wu, Rob Fender +1
We have observed variations in the optical emission lines from the X-ray binary Circinus X-1. These variations may be attributed both to orbital variations and to long term secular…
astro-ph2001★ 3 cited
Formation of optical lines in black-hole binaries
Kinwah Wu, Roberto Soria, Helen Johnston +1
The HI Balmer emission lines of black-hole binaries show double-peaked profiles during the high-soft state and the quiescent state. In the high-soft state the profiles are asymmetr…