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Astron. Astrophys. 331, 627-632 (1998)

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A spectroscopic study of some suspected chemically peculiar stars

small.htm F. Leone * 1, 3 and G. Catanzaro 2, 3

1 Osservatorio Astrofisico di Catania, Città Universitaria, I-95125 Catania, Italy (fleone@alpha4.ct.astro.it)
2 Dipartimento di Fisica della Materia e Tecnologie Fisiche Avanzate, Università di Messina, Salita Sperone 31, I-98166 Messina, Italy
3 C.N.R.-Gruppo Nazionale di Astronomia, UdR di Catania, Città Universitaria, I-95125 Catania, Italy

Received 10 July 1997 / Accepted 23 October 1997

Abstract

Time-resolved spectra in the 410 - 700 nm range have been obtained to investigate 10 stars which are classified as suspected chemically peculiar stars in The General Catalogue of Ap and Am stars by Renson et al. (1991) or in the latest literature.

Among the studied stars, HD 20629 presents metal abundances which are significantly different from main sequence star values and it should be classified as Silicon star. From the HeI 587.6 nm line, we conclude that HD 35575 is a helium weak star.

Because of the found radial velocity variability and the derived abundances, the periodic photometric variable HD 38602 could be an ellipsoidal variable.

Key words: stars: chemically peculiar – abundances – individual: HD 20629, HD 35575, HD 38602

* Visiting astronomer, Complejo Astrónomico El Leoncito, which is operated under agreement between the Consejo Nacional de Investigationes Cientifícas y Técnicas (CONICET) and the National Universities of La Plata, Córdoba and San Juan

Send offprint requests to: F. Leone

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© European Southern Observatory (ESO) 1998

Online publication: February 16, 1998
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