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Elemental Abundances of the B and A Stars. II. Gamma Geminorum, HD 60825, 7 Sextantis, HR 4817, and HR 5780

Saul J. Adelman and A. G. Davis Philip
Publications of the Astronomical Society of the Pacific
Vol. 106, No. 706 (1994 December), pp. 1239-1247
Stable URL: http://www.jstor.org/stable/40680477
Page Count: 9
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Elemental Abundances of the B and A Stars. II. Gamma Geminorum, HD 60825, 7 Sextantis, HR 4817, and HR 5780
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Abstract

We extend fine analyses of the and A stars, γ Geminorum, 7 Sextantis, HR 4817, and HR 5780 using additional spectroscopic data from the KPNO coudé 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 ã 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.

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