The Abundance Patterns of Sirius and Vega (original) (raw)

NASA/ADS

;

• Zhao, G. ;
• Chen, Y. Q. ;
• Li, Z. W.

Abstract

On the basis of high-resolution echelle spectra obtained with the Coudé Echelle Spectrograph attached to the 2.16 m telescope at the Beijing Astronomical Observatory (Xinglong, China) for Sirius and Vega, we performed an elemental abundance analysis of 29 ions, in which 23 elements are included, with Teff=9880, logg=4.40, [Fe/H]=0.50, and ξt=1.85 km s-1 for Sirius and Teff=9430, logg=3.95, [Fe/H]=-0.57, and ξt=1.50 km s-1 for Vega. The results show different abundance patterns for these two stars. The iron peak elements seem to be enhanced by about 1.0 dex in Sirius relative to Vega. Comparison with previous investigations is present.

Publication:

The Astrophysical Journal

Pub Date:

February 2001

DOI:

10.1086/319000

Bibcode:

2001ApJ...548..953Q

Keywords:

• Stars: Abundances;
• Stars: Early-Type;
• stars: individual (Sirius A;
• Vega)