ESO–VLT and Spitzer spectroscopy of IRAS 05328−6827: a massive young stellar object in the Large Magellanic Cloud

doi:10.1111/j.1745-3933.2005.00108.x

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Monthly Notices of the Royal Astronomical Society: Letters

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Monthly Notices of the Royal Astronomical Society

Volume 364 Issue 1, Pages L71 - L75

Published Online: 19 Oct 2005

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ESO–VLT and Spitzer spectroscopy of IRAS 05328−6827: a massive young stellar object in the Large Magellanic Cloud

Jacco Th. van Loon ^1★ , J. M. Oliveira ¹ , P. R. Wood ² , A. A. Zijlstra ³ , G. C. Sloan ⁴ , M. Matsuura ³ , P. A. Whitelock ⁵ , M. A. T. Groenewegen ⁶ , J. A. D. L. Blommaert ⁶ , M.-R. L. Cioni ⁷ , S. Hony ⁶ , C. Loup ⁸ and L. B. F. M. Waters ^6,9

¹ Astrophysics Group, School of Physical & Geographical Sciences, Keele University, Staffordshire ST5 5BG ² Research School of Astronomy and Astrophysics, Australian National University, Cotter Road, Weston Creek, ACT 2611, Australia ³ School of Physics and Astronomy, University of Manchester, Sackville Street, PO Box 88, Manchester M60 1QD ⁴ Department of Astronomy, Cornell University, 108 Space Sciences Building, Ithaca NY 14853-6801, USA ⁵ South African Astronomical Observatory, PO Box 9, 7935 Observatory, South Africa ⁶ Instituut voor Sterrenkunde, Celestijnenlaan 200B, B-3001 Leuven, Belgium ⁷ Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ ⁸ Institut d'Astrophysique de Paris, CNRS, 98bis Boulevard Arago, 75014 Paris, France ⁹ Astronomical Institute, University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands

Correspondence to ^★ E-mail: jacco@astro.keele.ac.uk

KEYWORDS

circumstellar matter • stars: formation • stars: pre-main sequence • ISM: individual: LHA 120-N 148 • Magellanic Clouds • infrared: stars

ABSTRACT

We present the first thermal–infrared spectra of an extragalactic Young Stellar Object (YSO), IRAS 05328−6827 in the H ii region LHA 120-N 148 in the Large Magellanic Cloud (LMC). The observed and modelled spectral energy distribution reveals a massive YSO, M∼ 20 M_⊙ , which is heavily embedded and probably still accreting. The reduced dust content as a consequence of the lower metallicity of the LMC allows a unique view into this object, and together with a high C/O ratio may be responsible for the observed low abundance of water ice and relatively high abundances of methanol and CO₂ ices.

Accepted 2005 September 21. Received 2005 August 29; in original form 2005 July 28

DIGITAL OBJECT IDENTIFIER (DOI)

10.1111/j.1745-3933.2005.00108.x About DOI