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The Evolution of Spiral Disks | | Matthew A. Bershady
; David R. Andersen
; | | Date: |
15 Oct 1999 | | Subject: | astro-ph | | Affiliation: | U. of Wisconsin), David R. Andersen (Penn State University | | Abstract: | We report on aspects of an observational study to probe the mass assembly of large galaxy disks. In this contribution we focus on a new survey of integral-field H-alpha velocity-maps of nearby, face on disks. Preliminary results yield disk asymmetry amplitudes consistent with estimates based on the scatter in the local Tully-Fisher relation. We also show how the high quality of integral-field echelle spectroscopy enables determinations of kinematic inclinations to i~20 deg. This holds the promise that nearly-face-on galaxies can be included in the Tully-Fisher relation. Finally, we discuss the prospects for measuring dynamical asymmetries of distant galaxies. | | Source: | arXiv, astro-ph/9910281 | | Services: | Forum | Review | PDF | Favorites | |
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