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Paper: Distant Disk Galaxies: Kinematics and Evolution to z ~ 1
Volume: 240, Gas and Galaxy Evolution: A Conference in Honor of the 20th Anniversary of the VLA
Page: 89
Authors: Vogt, N. P.
Abstract: High resolution HST images have been combined with Keck 10 m telescope spectra to study the internal kinematics of 100 faint disk galaxies in the redshift range 0.2 <= z <= 1. These data form a high redshift Tully-Fisher relation that spans five magnitudes and extends to well below L*, with no obvious change in shape or slope with respect to the local Tully-Fisher relation for the bulk of the observed population. The small offset of < 0.2 B mag can be attributed to strong brightening of a fraction of the low mass galaxy population at redshifts z >= 0.5. A comparison of disk surface brightness between local and high redshift samples yields an offset of < 0.3 B mag, that increases smoothly with redshift and is linked to the change in the surface brightness selection function with redshift. These results provide further evidence for only a modest increase in luminosity with lookback time for this population. The change in disk size with redshift for disks of a given mass is then examined, to test current models for the formation of galactic disks which suggest that high redshift spirals should be substantially smaller than nearby counterparts.
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