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Astron. Astrophys. 335, L69-L72 (1998)

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Letter to the Editor

ISO-SWS *spectra of the C-rich AGB star R Scl and dynamical model atmospheres

J. Hron 1, R. Loidl 1, S. Höfner 2, 1, U.G. Jorgensen 2, B. Aringer 1 and F. Kerschbaum 1

1 Institut für Astronomie der Universität Wien, Türkenschanzstrasse 17, A-1180 Wien, Austria
2 Niels Bohr Institute, Astronomical Observatory, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark

Received 12 May 1998 / Accepted 22 May 1998

Abstract

We have monitored the spectral variations of the carbon rich AGB star R Scl in the 2-45 µm range using the ISO-SWS instrument. We have also computed hydrostatic and hydrodynamic model atmospheres and corresponding synthetic spectra representative for two phases of R Scl. There is good qualitative agreement between observations and models in the near IR. This demonstrates the theoretical progress and the potential of analysing carbon star spectra with self-consistent dynamical models.

Key words: stars: AGB and post-AGB – stars: atmospheres – hydrodynamics – molecular processes – stars: variables – infrared: stars

* Based on observations with ISO, an ESA project with instruments funded by ESA member states (especially the PI countries: France, Germany, the Netherlands and the United Kingdom) and with the participation of ISAS and NASA.

Send offprint requests to: hron@astro.univie.ac.at

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© European Southern Observatory (ESO) 1998

Online publication: June 26, 1998
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