Broad absorption line quasars with redshifted troughs: high-velocity infall or rotationally dominated outflows?
We report the discovery in the Sloan Digital Sky Survey (SDSS) and the SDSS-III Baryon Oscillation Spectroscopic Survey of 17 broad absorption line (BAL) quasars with high-ionization troughs that include absorption redshifted relative to the quasar rest frame. The redshifted troughs extend to velocities up to v ≃ 12 000 km s-1 and the trough widths
Hall, P. B. et al.
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2013