Fluorine abundances in R CrB and EHe stars
Abstract
Neutral fluorine lines are identified in the spectra of warm R CrB stars and cool EHe stars obtained from VBT echelle spectrometer and McDonald. The overabundance of fluorine in these H-deficient stars gives us clues to their origin and evolutionary connection. Synthesis of fluorine is discussed in the light of single-star evolution, close-binary evolution, and double-degenerate mergers that results in H-deficiency in these stars.
- Publication:
-
Bulletin of the Astronomical Society of India Proceedings
- Pub Date:
- 2008
- Bibcode:
- 2008BASIP..25R..55P