FUSE observations of H2 around the Herbig AeBe stars HD 100546 and HD 163296
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
: Carnegie Institution of Washington, Washington, DC, USA
5
Meudon Observatory, Meudon, France
Corresponding author: A. Lecavelier des Etangs, lecaveli@iap.fr
Received:
5
March
2003
Accepted:
12
June
2003
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 H2.
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
© ESO, 2003