Stellar Kinematics of the Isolated Dwarf Irregular WLM

Details Stellar Kinematics of the Isolated Dwarf Irregular WLM Stellar Kinematics of the Isolated Dwarf Irregular WLM

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011eas....48...59l&link_type=abstract

EAS Publications Series, Volume 48, 2011, pp.59-60

Physics

Scientific paper

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.

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