S 32 and UKS-Ce1: Two barium-rich symbiotic stars

Details S 32 and UKS-Ce1: Two barium-rich symbiotic stars S 32 and UKS-Ce1: Two barium-rich symbiotic stars

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...284..156s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 284, no. 1, p. 156-160

Astronomy and Astrophysics

Astrophysics

14

Abundance, Barium, Peculiar Stars, Stellar Spectra, Symbiotic Stars, Carbon Stars, Galactic Halos, Stellar Atmospheres, Stellar Evolution, White Dwarf Stars

Scientific paper

Spectra of the two symbiotic binaries S32 and UKS-Ce1 are presented. They show the clear presence of carbon and s-process element enhancement in the atmosphere of the cool component. The giants in S32 and UKS-Ce1 are classified as CH and CH-like stars with spectral types C1,1CH and C4,5Jch respectively. The companion is a hot white dwarf which is ionizing a high density nebula with strong H I and He II emission. Both systems belong most likely to the halo population. S32 and UKS-Ce1 are unique systems because they exhibit simultaneously strong symbiotic activity and the barium star type abundance anomaly. The evolutionary relationship between symbiotic stars and CH/Ba stars is briefly discussed.

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