The Velocity Field of Quasar Broad Emission Line Gas
Abstract
In this Letter, the broad emission line (BEL) profiles of superluminal quasars with apparent jet velocities, βa>10, (ultraluminal QSOs, or ULQSOs hereafter) are studied as a diagnostic of the velocity field of the BEL emitting gas in quasars. The ULQSOs are useful because they satisfy a very strict kinematical constraint, their parsec scale jets must be propagating within 12 of the line of sight. We know the orientation of these objects with great certainty. The large BEL FWHM, 3,000 km/s - 6,000 km/s, in ULQSOs tend to indicate that the BEL gas has a larger component of axial velocity (either random or in a wind) along the jet direction than previously thought.
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