The Evolution of Spiral Disks

Details The Evolution of Spiral Disks The Evolution of Spiral Disks

1999-10-15

arxiv.org/abs/astro-ph/9910281v1

Astronomy and Astrophysics

Astrophysics

to appear in "Dynamics of Galaxies: from the Early Universe to the Present," eds. F. Combes, G.A. Mamon and V. Charmandaris (A

Scientific paper

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.

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