ELEMENTAL ABUNDANCES OF THE B-STARS AND A-STARS .2. GAMMA-GEMINORUM, HD-60825, 7-SEXTANTIS, HR-4817, AND HR-5780

Citation
Sj. Adelman et Agd. Philip, ELEMENTAL ABUNDANCES OF THE B-STARS AND A-STARS .2. GAMMA-GEMINORUM, HD-60825, 7-SEXTANTIS, HR-4817, AND HR-5780, Publications of the Astronomical Society of the Pacific, 106(706), 1994, pp. 1239-1247
Citations number
37
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
106
Issue
706
Year of publication
1994
Pages
1239 - 1247
Database
ISI
SICI code
0004-6280(1994)106:706<1239:EAOTBA>2.0.ZU;2-A
Abstract
We extend fine analyses of the B and A stars, gamma Geminorum, 7 Sexta ntis, HR 4817, and HR 5780 using additional spectroscopic data from th e KPNO coude feed telescope with a TI CCD, camera 5, and grating A, an d ATLAS9 model atmospheres. In addition we study HD 60825, which had c olors similar to the FHB A stars, but was found to be a Population I s tar. HD 60825, as is gamma Gem, is a sharp-lined early-A star with nea rly solar derived abundances. HR 5780 and 7 Sex are also examples of s tars which for the most part have solar abundances. The newly derived abundances for HR 4817 reveal important differences with respect to 53 Tau, a somewhat similar HgMn star.