A survey for distant AGB carbon stars in the Galactic halo

Details A survey for distant AGB carbon stars in the Galactic halo A survey for distant AGB carbon stars in the Galactic halo

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf..621m&link_type=abstract

SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret

Astronomy and Astrophysics

Astrophysics

Scientific paper

The results of an on-going survey aiming at finding luminous AGB stars in the galactic halo are presented. We select AGB carbon rich stars through their near-infrared 2MASS colors and systematically verify their nature through medium resolution spectroscopy. The distances are estimated by comparison to templates taken in the Sgr dwarf galaxy or the Magellanic Clouds, and range from 10 to 100 kpc. The radial velocities are also obtained. These rare objects are useful for tracing the tidal streams such as the Sgr one, and will also contribute to better know the distribution and mass of dark matter in the halo (i.e. the total mass of the Galaxy, which is uncertain by a factor of about 5, e.g. Clewley et al. astro-ph/0310675). More details on the halo carbon star survey are given in the recent paper: Mauron N., Azzopardi M., Gigoyan K., and Kendall T.
2004, Astron. Astrophys. 418, 77 .

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