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Astron. Astrophys. 344, L17-L20 (1999)


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Letter to the Editor

IRAS04496-6958: A luminous carbon star with silicate dust in the Large Magellanic Cloud *

Norman R. Trams 1, Jacco Th. vanLoon 2, Albert A. Zijlstra 3, Cecile Loup 4, M.A.T. Groenewegen 5, L.B.F.M. Waters 2,6, Patricia A. Whitelock 7, J.A.D.L. Blommaert 8, Ralf Siebenmorgen 8 and Astrid Heske 8

1 Integral Science Operations Centre, Astrophysics Div., Science Dep., ESTEC, P.O. Box 299, 2200 AG Noordwijk, The Netherlands
2 Astronomical Institute, University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands
3 University of Manchester Institute of Science and Technology, P.O. Box 88, Manchester M60 1QD, UK
4 Institut d'Astrophysique de Paris, 98bis Boulevard Arago, F-75014 Paris, France
5 Max-Planck-Institut für Astrophysik, Karl-Schwarzschild Strasse 1, D-85740 Garching bei München, Germany
6 Space Research Organization Netherlands, Landleven 12, 9700 AV Groningen, The Netherlands
7 South African Astronomical Observatory, P.O. Box 9, 7935 Observatory, South Africa
8 ISO Data Centre, Astrophysics Division, Science Department of ESA, Villafranca del Castillo, P.O. Box 50727, E-28080 Madrid, Spain

Received 17 February 1999 / Accepted 23 February 1999

Abstract

We describe ISO observations of the obscured Asymptotic Giant Branch (AGB) star IRAS04496-6958 in the Large Magellanic Cloud (LMC). This star has been classified as a carbon star. Our new ISOCAM CVF spectra show that it is the first carbon star with silicate dust known outside of the Milky Way. The existence of this object, and the fact that it is one of the highest luminosity AGB stars in the LMC, provide important information for theoretical models of AGB evolution and understanding the origin of silicate carbon stars.

Key words: stars: carbon – stars: circumstellar matter – stars: mass-loss – stars: AGB and post-AGB – galaxies: Magellanic Clouds – infrared: stars

* This paper is based on observations with the Infrared Space Observatory (ISO). ISO is 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: N.R. Trams

© European Southern Observatory (ESO) 1999

Online publication: March 18, 1999

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