Deconstructing Disk Velocity Distribution Functions in the Disk-Mass Survey

Details Deconstructing Disk Velocity Distribution Functions in the Disk-Mass Survey Deconstructing Disk Velocity Distribution Functions in the Disk-Mass Survey

2008-01-31

arxiv.org/abs/0801.4912v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, to appear in the proceedings of "Formation and Evolution of Galaxy Disks", Rome, October 2007, Eds. J. Fun

Scientific paper

We analyze integral-field ionized gas and stellar line-of-sight kinematics in
the context of determining the stellar velocity ellipsoid for spiral galaxies
observed by the Disk-Mass Survey. Our new methodology enables us to measure,
for the first time, a radial gradient in the ellipsoid ratio sigma_z / sigma_R.
Random errors in this decomposition are 15% at two disk scale-lengths.

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