Elemental Abundances of the B and A Stars II. Gamma Geminorum, HD 60825, 7 Sextantis, HR 4817, and HR 5780
Abstract
Fine analysis of the B and A stars, gamma Geminorum, 7 Sextantis, HR 4817, and HR 5780 are extended using additional spectrograms obtained at the KPNO coude feed telescpe with a TI CCD, camera 5, and grating A. In addition HD 60825, a star with colors similar to FHB A stars, but was found to be a Population I star is studied. ATLAS9 model atmospheres are used in these new analyses. HD 60825 as is gamma Gem is a sharp-lined early A star with nearly solar derived abundances. HR 5780 and 7 Sex are also examples of stars which for the most part have solar abuandances. The newly derived abundances for HR 4817 reveal important differences with respect to 53 Tau, a somewhat similar peculiar HgMn star. (SECTION: Stars)
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- December 1994
- DOI:
- 10.1086/133501
- Bibcode:
- 1994PASP..106.1239A
- Keywords:
-
- A Stars;
- Abundance;
- B Stars;
- Stellar Gravitation;
- Stellar Temperature;
- Astronomical Spectroscopy;
- Line Spectra;
- Stellar Envelopes;
- Stellar Models;
- Tables (Data);
- Astronomy;
- STARS: ABUNDANCES