POSTER PAPER 3.02

Investigating a Chromosphere Plus Disk-wind Scenario for the Hot Gas Component of Beta-Pictoris, as Revealed by FUSE
Jean-Claude Bouret, Magali Deleuil

Institute: Laboratoire d'Astrophysique de Marseille - CNRS - France
Contact Email: Jean-Claude.Bouret@astrsp-mrs.fr

Abstract: The FUSE satellite revealed the first emission line spectrum of Beta Pictoris. Broad emission lines due to highly ionized species, C III and O VI, are well detected above the very low continuum level. The mere presence of such lines in Beta Pictoris spectrum is evidence of a complex stellar environment, including dense and hot regions, within a few stellar radii of the photosphere. Based on the intepretation of the apparent structure of the lines profiles, it has been concluded that accretion and solar-like activity are the most likely processes for the gas heating. We present the results we obtained with a model including a solar-like extended chromosphere-corona complex and a weak wind.

Investigating a Chromosphere Plus Disk-wind Scenario for the Hot Gas Component of Beta-Pictoris, as Revealed by FUSE [PDF - Type 1 fonts]

Investigating a Chromosphere Plus Disk-wind Scenario for the Hot Gas Component of Beta-Pictoris, as Revealed by FUSE [PS]

Index Keywords: Beta Pictoris; FUSE; Stellar Atmospheres, Circumstellar Material

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Manuscript submitted: 2001-Sep-12
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown, G. M. Harper, & T. R. Ayres. Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems, & The Sun,
© 2003 University of Colorado.