| Issue |
EAS Publications Series
Volume 48, 2011
CRAL-2010 A Universe of Dwarf Galaxies
|
|
|---|---|---|
| Page(s) | 59 - 60 | |
| Section | Star Formation History and Chemical Enrichment | |
| DOI | https://doi.org/10.1051/eas/1148009 | |
| Published online | 11 July 2011 | |
M. Koleva, Ph. Prugniel and I. Vauglin (eds)
EAS Publications Series, 48 (2011) 59–60
Stellar Kinematics of the Isolated Dwarf Irregular WLM
1 Univ. of Victoria
2 Univ. of Victoria
3 Univ. of Tasmania
4 Observatoire de Strasbourg
5 HIA-NRC
6 CIT
7 Institute of Astronomy
8 Univ. of Minnesota
Chemical abundances and radial velocities for ∼210 stars in WLM, ∼130 new stars from DEIMOS spectroscopy, and 80 stars from Leaman et al. (2009) are presented. This sample shows that this isolated dwarf has chemically, dynamically, and spatially distinct stellar populations similar to the nearby dwarf spheroidals. The kinematics of the stars appear to be decoupled from the HI gas, which shows a higher rotational velocity profile. This thicker stellar configuration for a distant, isolated dwarf irregular may have implications for timescales of tidal transformation scenarios of infalling galaxies in the Local Group.
© EAS, EDP Sciences, 2011