Far Ultraviolet Spectroscopy of HD 76534

C. Martin (1) , J.-C. Bouret (1) , Magali Deleuil (1, 2) , T. Simon (3) , Claude Catala (4, 5, 6)

1 LAM - Laboratoire d'Astrophysique de Marseille
2 Université de Provence - Aix-Marseille 1
3 Institute for Astronomy, University of Hawaii
4 Observatoire de Paris
5 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
6 Pôle Astronomie du LESIA

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 H₂ absorption lines which allow to quantify the gaseous content along the line of sight. This analysis evidences large amounts of cold and warm H₂ toward the star. We demonstrate that the H₂ 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 H₂ of Herbig Ae/Be stars.

Domaines: Astrophysique [astro-ph]; Planète et Univers [physics]

C. Martin, J.-C. Bouret, Magali Deleuil, T. Simon, Claude Catala. Far Ultraviolet Spectroscopy of HD 76534. Astronomy and Astrophysics - A&A, 2004, 416, pp.L5-L8. ⟨10.1051/0004-6361:20040026⟩. ⟨hal-03732792⟩