Mapping the Stellar Dynamics of M31

Details Mapping the Stellar Dynamics of M31 Mapping the Stellar Dynamics of M31

2004-07-16

arxiv.org/abs/astro-ph/0407331v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures, to appear in the proceedings of the ESO-Workshop "Planetary Nebulae beyond the Milky Way", May 19 - 21 (20

Scientific paper

Using the Planetary Nebula Spectrograph, we have observed and measured the velocities for some 2764 PNe in the disk and halo of the Andromeda galaxy. Preliminary analysis using a basic ring model shows a rotation curve in good agreement with that obtained from HI data out to ~20kpc. Some substructure has also been detected within the velocity field, which can be modeled as the continuation of the tidal-remnant known as the Southern Stream, as it passes through Andromeda's disk.

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