Kinematics in the z = 2.81 Galaxy and the Evidence for Rotation |
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| Authors: | Milan M ?irkovi? |
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| Institution: | (1) Astronomical Observatory, Volgina 7, Belgrade, Serbia, 11160 |
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| Abstract: | The existence of rotation signatures in damped Lyαabsorption systems represents a crucial test of the hypothesis that these features arise in disks of normal spiral galaxies. We apply the method for evaluating such signatures to the metal absorption lines in QSO 0528-250. In particular, the systemic redshift of the absorber is inferred from the recent detection of emission in the absorber by Möller and Warren. The kinematics of this absorber are particularly interesting because molecular hydrogen, the densest ISM component of the assumed foreground absorbing galaxy, is detected. Contrary to a recent claim, the method yields a satisfactory value for the assumed rotation velocity of the absorber. |
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