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A&A 407, 935-939 (2003)
DOI: 10.1051/0004-6361:20030924
FUSE observations of H
around the Herbig AeBe stars HD 100546 and HD 163296
A. Lecavelier des Etangs1, M. Deleuil2, A. Vidal-Madjar1, A. Roberge3, 4, F. Le Petit5, G. Hébrard1, R. Ferlet1, P. D. Feldman3, J.-M. Désert1 and J.-C. Bouret2
1 Institut d'Astrophysique de Paris, CNRS, 98 bis Bld. Arago, Paris, France
2 Laboratoire d'Astrophysique de Marseille, Marseille, France
3 Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD, USA
4 Current Address: Carnegie Institution of Washington, Washington, DC, USA
5 Meudon Observatory, Meudon, France
(Received 5 March 2003 / Accepted 12 June 2003 )
Abstract
We present the analysis of FUSE observations of two Herbig AeBe stars
known to harbor young circumstellar disks: HD 100546 and HD 163296.
In both cases we detect absorption lines from warm and dense H
2.
The thermalization of the rotational levels up to
allows evaluation of the temperature, density and typical size
of the absorbing layer.
These quantities are consistent with absorption of the light
of the central star by a thin layer of a circumstellar disk
seen at an intermediate inclination.
Key words: planetary systems: protoplanetary disks -- circumstellar matter -- stars: individual: HD 100546 -- stars: individual: HD 163296 -- stars: pre-main sequence
Offprint request: A. Lecavelier des Etangs, lecaveli@iap.fr
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