The Metal Abundances of Symbiotic Stars

Details The Metal Abundances of Symbiotic Stars The Metal Abundances of Symbiotic Stars

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..752..123z&link_type=abstract

STELLAR ASTROPHYSICS WITH THE WORLD'S LARGEST TELESCOPES: First International Workshop on Stellar Astrophysics with the World's

Astronomy and Astrophysics

Astrophysics

1

Cataclysmic Binaries, Symbiotic Stars, Abundances, Chemical Composition

Scientific paper

High resolution, high signal to noise, echelle spectra of some symbiotic stars were obtained in five runs from 1999 to 2004. The metal abundance of HD154791, which contains a neutron-star companion, is similar to other normal giants with same spectral type. The stellar surface parameters of the cool component of AG Dra have been calculated utilizing the Kurucz atmosphere model and assuming the local thermodynamic equilibrium. We have obtained the effective temperature of 3960 +/- 50 K, the surface gravity of log(g) = 0.85 +/- 0.30, and the metal abundance of [Fe/H]= -1.5. Combining the results with other authors' observations, we conclude that the cool component of AG Dra may be evolved to early AGB.

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