Extreme Infrared Stars Discovered in Magellanic Cloud Globular Clusters |
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| Authors: | T Tanabé S Nishida Y Nakada T Onaka IS Glass M Sauvage |
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| Institution: | (1) Institute of Astronomy, The University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181, Japan;(2) Kiso Observatory, Institute of Astronomy, The University of Tokyo, Mitake-mura, Kiso-gun, Nagano 397-01, Japan;(3) Department of Astronomy, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan;(4) South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa;(5) CEA/DSM/DAPNIA/Service d'Astrophys, C. E. Saclay, F-91191 Gif-sur-Yvette Cedex, France |
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| Abstract: | We report preliminary results of our systematic survey for infrared stars in the globular clusters of the Magellanic Clouds.
In the course of an ISOCAM survey for AGB stars in the intermediate-age clusters, we have discovered extremely red AGB stars
in NGC 419 and NGC 1978. From their colours and luminosities, they are thought to be experiencing intense mass-loss and to
be in the final or superwind phase of the AGB evolution. However, they seem to be of somewhat lower luminosity than the corresponding
visible AGB stars when only the mid-infrared data are taken into account. This suggests that hitherto unobserved infrared
excesses may exist at longer wavelengths.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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