Chemical composition of a halo carbon star TT CVn

Details Chemical composition of a halo carbon star TT CVn Chemical composition of a halo carbon star TT CVn

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992balta...1..181k&link_type=abstract

Baltic Astronomy, vol. 1, p. 181

Astronomy and Astrophysics

Astronomy

7

Carbon Stars, Chemical Composition, Giant Stars, Stellar Composition, Atmospheric Models, Galactic Halos, Stellar Atmospheres, Isotopes, Late Stars, Oxygen

Scientific paper

The chemical composition of a late-type carbon halo star TT CVn is determined using the synthetic spectrum method. The carbon/oxygen abundance ratio is found to be C/O = 1.07, and the carbon isotopic abundances are close to the solar value. The iron abundance is extremely low: Fe/H = -2.90. Light metals are slightly overabundant relative to iron but the heavy s-process elements exhibit significant overabundance.

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