Carbon Stars in the Bulge -- or Beyond It?

Details Carbon Stars in the Bulge -- or Beyond It? Carbon Stars in the Bulge -- or Beyond It?

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..378..410w&link_type=abstract

Why Galaxies Care About AGB Stars: Their Importance as Actors and Probes. ASP Conference Series, Vol. 378, proceedings of the co

Astronomy and Astrophysics

Astronomy

Scientific paper

The carbon stars in the direction of the Bulge were recently proposed to belong to the Sagittarius system which, with its lower metallicity, would more easily produce carbon stars. The compositions of the carbon stars might be used to distinguish between true members of the Bulge and members of the Sagittarius stream seen through the Bulge. We present oxygen abundances for a sample of carbon stars in the Sagittarius dwarf galaxy including its tidal stream, and towards the galactic Bulge. The abundances were determined from infrared spectra obtained with the ISAAC spectrometer on VLT (R=1500). We find that the oxygen abundances of the Bulge carbon stars are compatible with membership of the Sagittarius stream, but we also discuss possible scenarios that might explain their abundances if they were true Bulge members.

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