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Astron. Astrophys. 321, L37-L38 (1997)

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Letter to the Editor

IUE observations of Beryllium II lines in Lithium-rich giant stars *

J. R. De Medeiros 1, A. Lèbre 2, M. R. de Garcia Maia 1 and R. Monier 3

1 Departamento de Física, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, R.N., Brazil
2 GRAAL CC072, Université Montpellier II, UPRESA CNRS 5024, F-34095 Montpellier Cedex 05, France
3 Observatoire de Strasbourg, 11 rue de l'Université, F-67000 Strasbourg, France

Received 29 October 1996 / Accepted 11 March 1997

Abstract

IUE spectra of the Beryllium II region are presented for two Lithium-rich giant stars, HD 9746 and HD 112127. In either spectrum there is no sign of significant Beryllium features at the Be II lines 3130.416 Å or 3131.064 Å, which seems to indicate that Be was depleted in these two Lithium-rich giants. This suggests that some additional Lithium was produced in their stellar interiors during the evolution along the giant branch.

Key words: stars: abundances – stars: giant – stars: late-type

* Based on observations by the International Ultraviolet Explorer (IUE)

Send offprint requests to: J. R. De Medeiros: renan@dfte.ufrn.br

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© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998
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