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

被引：13

作者：

ADELMAN, SJ ^{[1
]}

PHILIP, AGD ^{[1
]}

机构：

[1] UNION COLL,SCHENECTADY,NY 12308

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 1994年 / 106卷 / 706期

关键词：

D O I：

10.1086/133501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We extend fine analyses of the B and A stars, gamma Geminorum, 7 Sextantis, HR 4817, and HR 5780 using additional spectroscopic data from the KPNO coude feed telescope with a TI CCD, camera 5, and grating A, and ATLAS9 model atmospheres. In addition we study HD 60825, which had colors similar to the FHB A stars, but was found to be a Population I star. 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 abundances. The newly derived abundances for HR 4817 reveal important differences with respect to 53 Tau, a somewhat similar HgMn star.

引用

页码：1239 / 1247

页数：9

共 37 条

[1] A COMPARISON OF KPNO CCD AND COADDED DAO PHOTOGRAPHIC SPECTROSCOPIC DATA [J].