2001/05/18 by S. C. Gallagher, Gallagher, S. C., W. N. Brandt +5
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0105332
6 pages, 4 postscript figures, LaTeX, requires newpasp.sty. To appear in the conference proceedings for Mass Outflow in AGN: New Perspectives, ASP Conference Series, eds. D. M. Crenshaw, S. B. Kraemer, and I. M. George
arxiv created 2001/05/18 · arxiv updated 2009/12/01
BAL QSOs are notoriously faint X-ray sources, presumably due to extreme intrinsic absorption. However, several objects have begun to appear through the obscuration with recent X-ray observations by Chandra and ASCA. Where enough counts are present for X-ray spectroscopy, the signatures of absorption are clear. The evidence is also mounting that the absorbers are more complicated than previous simple models assumed; current absorber models need to be extended to the high-luminosity, high-velocity, and high-ionization regime appropriate for BAL QSOs.