Nebular abundances of southern symbiotic stars

Details Nebular abundances of southern symbiotic stars Nebular abundances of southern symbiotic stars

2005-02-16

arxiv.org/abs/astro-ph/0502308v1

Astronomy and Astrophysics

Astrophysics

12 pages, 6 figures, A&A - accepted

Scientific paper

10.1051/0004-6361:20041994

We have calculated relative elemental abundances for a sample of 43 symbiotic stars. Helium abundances and the relative elemental abundances N/O, Ne/O, Ar/O were derived from new spectra collected in the optical range through low dispersion spectroscopy. The He ionic abundances were derived taking into account self-absorption effects in Balmer lines. We found that the symbiotic stars in the galactic bulge have heavy element abundances showing the same wide distribution as other bulge objects. In the galactic disk, the symbiotic stars follow the abundance gradient as derived from different kinds of objects.

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