A&A Supplement Series, Vol. 125, October II, 219-227

Received October 28, 1996; accepted January 7, 1997

Elemental abundance analyses with Complejo Astronómico El Leoncito REOSC echelle spectrograms

II. Leporis, 7 Sextantis, HR 4817, and 28 Herculis

S.J. Adelman^, - O.I. Pintado^,

Send offprint request: S.J. Adelman
 Departament of Physics, The Citadel, 171 Moultrie Street, Charleston, SC 29409, U.S.A.
  Complejo Astronómico El Leoncito, CC 468, 5400 San Juan, Argentina

Abstract:

Elemental abundances are derived for four sharp-lined stars, the Mercury-Manganese stars Lep, HR 4817, and 28 Her, and 7 Sex, a Population I star with Population II space motions, using REOSC echelle spectrograms obtained at CASLEO to extend previous studies. Comparisons with published equivalent widths indicate that the CASLEO scale is marginally larger than those of DAO Reticon and KPNO CCD spectra. The CASLEO spectrograms have improved the quality of the abundance determinations. New abundances are found for a few elements.

keywords: stars: abundances -- stars: chemically peculiar -- star: Leporis -- stars: HR 4817 -- stars: 28 Herculis -- stars: 7 Sextantis

• 1. Introduction
• 2. Reduction of spectrograms
• 3. The elemental abundance analyses
• 4. Final comments
• References