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The Velocity Field of Quasar Broad Emission Line Gas | | Brian Punsly
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25 Jan 2007 | | Abstract: | In this Letter, the broad emission line (BEL) profiles of superluminal quasars with apparent jet velocities, $eta_{a}>10$, (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 $12^{circ}$ of the line of sight. We know the orientation of these objects with great certainty. The large BEL FWHM, $sim 3,000 mathrm{km/s} - 6,000 mathrm{km/s}$, 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. | | Source: | arXiv, astro-ph/0701732 | | Services: | Forum | Review | PDF | Favorites | |
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