Fluorine abundances in galactic asymptotic giant branch stars

C. Abia, K. Cunha, S. Cristallo, P. De Laverny, I. Domínguez, K. Eriksson, L. Gialanella, K. Hinkle, G. Imbriani, A. Recio-Blanco, V. V. Smith, O. Straniero, R. Wahlin

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

An analysis of the fluorine abundance in Galactic asymptotic giant branch (AGB) carbon stars (24 N-type, 5 SC-type, and 5 J-type) is presented. This study uses the state-of-the-art carbon-rich atmosphere models and improved atomic and molecular line lists in the 2.3 μm region. Significantly lower F abundances are obtained in comparison to previous studies in the literature. This difference is mainly due to molecular blends. In the case of carbon stars of SC-type, differences in the model atmospheres are also relevant. The new F enhancements are now in agreement with the most recent theoretical nucleosynthesis models in low-mass AGB stars, solving the long-standing problem of F in Galactic AGB stars. Nevertheless, some SC-type carbon stars still show larger F abundances than predicted by stellar models. The possibility that these stars are of larger mass is briefly discussed.

Original languageEnglish (US)
Pages (from-to)L94-L98
JournalAstrophysical Journal Letters
Volume715
Issue number2 PART 2
DOIs
StatePublished - 2010
Externally publishedYes

Keywords

  • Abundances
  • Nuclear reactions
  • Nucleosynthesis
  • Stars: AGB and post-AGB
  • Stars: abundances
  • Stars: carbon

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'Fluorine abundances in galactic asymptotic giant branch stars'. Together they form a unique fingerprint.

Cite this