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Astron. Astrophys. 353, L21-L24 (2000)


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Letter to the Editor

New infrared object in the field of the SMC cluster NGC 330 *

A. Kuinskas **  1,2,3, V. Vanseviius 4, M. Sauvage 5 and T. Tanabé 6

1 National Astronomical Observatory, Tokyo, 181-8588, Japan
2 Institute of Theoretical Physics and Astronomy, Gostauto 12, Vilnius 2600, Lithuania
3 Vilnius University, Institute of Material Research and Applied Science, Ciurlionio 9, Vilnius 2009, Lithuania
4 Institute of Physics, Gostauto 12, Vilnius 2600, Lithuania
5 CEA/DSM/DAPNIA/Service d'Astrophys. C.E. Saclay, 91191 Gif-sur-Yvette Cedex, France
6 The University of Tokyo, Institute of Astronomy, School of Science, Tokyo, 181-8588, Japan

Received 10 September 1999 / Accepted 1 December 1999

Abstract

We report ISO (Infrared Space Observatory) observations of a new infrared source discovered in the vicinity of the young populous cluster NGC 330 in the Small Magellanic Cloud. The object was observed with ISOCAM at 4.5, 6.75 and 11.5 µm and shows a prominent mid-infrared excess, indicating the presence of a dust shell. The available observations of the optical counterpart together with the mid-infrared ISOCAM data suggest that this object is most likely a post-AGB star, or a Be supergiant. Cluster membership and candidate evolutionary scenarios are discussed briefly.

Key words: space vehicles: instruments – stars: emission-line, Be – stars: AGB and post-AGB – galaxies: Magellanic Clouds – 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.
** Research Fellow of the Japan Society for the Promotion of Science

Send offprint requests to: A. Kuinskas

© European Southern Observatory (ESO) 2000

Online publication: January 18, 2000

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