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Astron. Astrophys. 338, L51-L54 (1998)


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Letter to the Editor

Properties of the Young Stellar Object N 160 A-IR *, **

Th. Henning 1, R. Klein 1, S.J. Chan 2, E.L. Fitzpatrick 3, R. Siebenmorgen 4 and B. Stecklum 5

1 Astrophysikalisches Institut und Universitäts-Sternwarte (AIU) Jena, Schillergässchen 2-3, D-07745 Jena, Germany
2 Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
3 Villanova University, 800 Lancaster Ave., Villanova, PA 19085, USA
4 ISO Science Operations Centre, Astrophysics Division of ESA, Villafranca del Castillo, P.O. Box 50727, E-28080 Madrid, Spain
5 Thüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany

Received 31 July 1998 / Accepted 20 August 1998

Abstract

We present near- and mid-infrared images of the young stellar object N 160 A-IR in the Large Magellanic Cloud (LMC). For the first time, the YSO is seen in the NIR as a compact point source in the north-western part of the H II region N 160 A. Furthermore, we present ISO-SWS spectra pointed on the YSO. The spectra cover the full wavelength range of SWS on board of ISO (2.5 - 45 µm) where most of the dust features are located. N 160 A-IR shows the unidentified infrared bands (UIBs) and silicate absorption on a steeply rising continuum plus fine structure lines from the H II region. A radiative transfer model for the YSO with a luminosity of [FORMULA] [FORMULA] being deeply embedded ([FORMULA]=60 mag) in its parental cloud reproduces the observations. The mass of the model cloud is 50,000 [FORMULA] consistent with other estimates.

Key words: stars: formation; H ii regions; N 160 A; LMC

* 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) with the participation of ISAS and NASA.
** Based on observations collected at the European Southern Observatory, La Silla, Chile.

Send offprint requests to: R. Klein, rklein@astro.uni-jena.de

© European Southern Observatory (ESO) 1998

Online publication: September 14, 1998

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