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Issue A&A
Volume 416, Number 2, March III 2004
Page(s) L5 - L8
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20040026



A&A 416, L5-L8 (2004)
DOI: 10.1051/0004-6361:20040026

Letter

Far Ultraviolet Spectroscopy of HD 76534

C. Martin1, J.-C. Bouret1, M. Deleuil1, 2, T. Simon3 and C. Catala4

1  Laboratoire d'Astrophysique de Marseille, Traverse du Siphon, BP 8, 13376 Marseille Cedex 12, France
2  Université de Provence, CMI, 39 rue Joliot Curie, 13453 Marseille Cedex 13, France
3  Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
4  Observatoire de Paris-Meudon, CNRS, Paris, France

(Received 22 December 2003 / Accepted 22 January 2004)

Abstract
We present the first Far Ultraviolet Spectroscopic Explorer (FUSE) spectrum of HD 76534, a Herbig Be star. Here we focus on the analysis of the H 2 absorption lines which allow to quantify the gaseous content along the line of sight. This analysis evidences large amounts of cold and warm H 2 toward the star. We demonstrate that the H 2 is bound to HD 76534 and we argue that it is likely distributed in a circumstellar envelope. In addition, the present study gives clues for the existence of common properties for the circumstellar H 2 of Herbig Ae/Be stars.


Key words: stars: circumstellar matter -- stars: pre-main sequence -- stars: individual: HD 76534

Offprint request: C. Martin, Claire.Martin@oamp.fr

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