Alpha-enhancement in the MW: results from the SDSS spectroscopic stellar database
Abstract
We analyzed a sample of about 2500 stars extracted from the Sloan Digital Sky Survey with Teffin the range 4750÷6500 K and log g greater than 1.5. Atmospheric parameter estimates are obtained by comparing observed and synthetic spectral indices. The dependence of the α-enhancement phenomenon on stellar metallicity and on Galactic position is investigated.
- Publication:
-
Stellar Populations as Building Blocks of Galaxies
- Pub Date:
- August 2007
- DOI:
- Bibcode:
- 2007IAUS..241..245F
- Keywords:
-
- Galaxy: stellar content;
- stars: abundances;
- stars: late-type