Mathematics – Logic
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atnf.prop..790v&link_type=abstract
ATNF proposal C1675, Semester: April, 2007
Mathematics
Logic
Galactic, Atca
Scientific paper
Stars in globular clusters are dying continuously, and in the process of dying they lose a significant fraction of their birth mass in the form of a stellar wind. This material first ends up in the intra-cluster medium (ICM), but it has become quite clear now that it does not remain in the ICM for very long. What happens to it after it has left the cluster is completely unknown. Our recent Spitzer Space Telescope atlas of omega Centauri shows several diffuse clouds, one of which in particular might have an origin in the cluster. We have also found an HI detection in the HIPASS data, close to omega Cen and at a velocity consistent with a cluster origin. We now propose to image these infrared and HI clouds with the AT in its most compact configuration, to look for morphological features and measure the kinematics that would strengthen the hypothesis that these are clouds which originated in omega Cen but which have left the cluster. This would make it the first detection of the extra-cluster medium (ECM), bearing resemblance to recent results in Local Group dwarf spheroidal galaxies.
Boyer Martha
Evans Nye
Gehrz Robert
Helton Andrew
McDonald Iain
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