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J.E. Everett, D.R. Ballantyne (CITA)
Reports of blueshifted X-ray absorption lines with v\rm outflow \gtrsim 0.1c have been reported by Pounds et al. (PG 1211+143, PG 0844+349), Reeves et al. (PDS 456), and Chartas et al. (APM 08279+5255, PG 1115+080). For the case of PG 1211+143, King & Pounds (2003) have proposed that the large column (NH \approx 5 \times 1023~{\rm cm-2}) of highly ionized gas is accelerated by continuum-driving, and launched from r \approx 150~R\rm Schwarzschild, where the escape velocity is of order 0.1c. We test simple models to determine whether such columns can be accelerated to the observed velocities by using Cloudy photoionization simulations and numerical integrations of a continuum-driven radial outflow. We also report on the observational signatures of such an wind. This work is supported by the Natural Sciences and Engineering Research Council of Canada.
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Bulletin of the American Astronomical Society, 36 #3
© 2004. The American Astronomical Soceity.