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The chemical composition of extremely metal-poor and carbon-rich star HD 112869

Published online by Cambridge University Press:  23 December 2005

L. Začs ,
I. Diebele  and
O. Alksnis
L. Začs
Affiliation:
Institute of Atomic Physics and Spectroscopy, University of Latvia, Raiņa bulvāris 19, LV-1586 Rīga, Latvia email: [email protected]
I. Diebele
Affiliation:
Institute of Atomic Physics and Spectroscopy, University of Latvia, Raiņa bulvāris 19, LV-1586 Rīga, Latvia email: [email protected]
O. Alksnis
Affiliation:
Institute of Atomic Physics and Spectroscopy, University of Latvia, Raiņa bulvāris 19, LV-1586 Rīga, Latvia email: [email protected]
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Abstract

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The preliminary results of abundance analysis are presented for extremely metal-poor carbon star HD 112869 = TT CVn = CGCS 3319. The radial velocity was found to be −137.7 km s−1. Our LTE abundance analysis supports an extremely low metallicity for TT CVn, [Fe/H] = −3.2, and a significant overabundance of carbon and neutron-capture elements. The 12C/13C ratio in the atmosphere of HD 112869 is high.

Keywords

Stars: AGB and post-AGBstars: abundancesstars: individual: HD 112869
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S228: From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution , May 2005 , pp. 281 - 282
Copyright
© 2005 International Astronomical Union