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C.-H. Rosie Chen, Remy Indebetouw, Jonathan P. Seale, Leslie W. Looney, You-Hua Chu, Robert A. Gruendl & Barbara A. Whitney

Physical Properties and Evolutionary Stages of Massive Young Stellar Objects in the Large Magellanic Cloud

Article Open Access

Abstract

Massive stars drive the evolution of galactic interstellar media, yet their formation remains poorly understood. We use Spitzer Infrared Spectrometer (IRS) observations of 277 massive young stellar objects (YSOs) in the Large Magellanic Cloud (LMC) and combine them with multi-wavelength photometry from U to 70 micrometer to construct and model their spectral energy distribution (SED) and to deduce their mass and evolutionary stage. We also examine the immediate interstellar and stellar environment using high-resolution optical and near-IR images to assess the origin of dust emission and multiplicity of sources. Some of these YSOs are spatially coincident with known masers and ultracompact HII regions that can be used as an independent check on the feasibility of SED fits. Comparisons among YSOs’ physical properties, immediate stellar and interstellar environment, and mid-IR spectral features are used to discuss evolution of massive YSOs in the LMC.

Pour citer cet article

C.-H. Rosie Chen, Remy Indebetouw, Jonathan P. Seale, Leslie W. Looney, You-Hua Chu, Robert A. Gruendl & Barbara A. Whitney, «Physical Properties and Evolutionary Stages of Massive Young Stellar Objects in the Large Magellanic Cloud», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 80 - Année 2011, 229 - 234 URL : http://popups.ulg.ac.be/0037-9565/index.php?id=2701.

A propos de : C.-H. Rosie Chen

University of Virginia, Charlottesville, Virginia, U.S.A.

A propos de : Remy Indebetouw

University of Virginia, Charlottesville, Virginia, U.S.A., and National Radio Astronomical Observatory, Charlottesville, Virginia, U.S.A.

A propos de : Jonathan P. Seale

University of Illinois, Urbana, Illinois, U.S.A.

A propos de : Leslie W. Looney

University of Illinois, Urbana, Illinois, U.S.A.

A propos de : You-Hua Chu

University of Illinois, Urbana, Illinois, U.S.A.

A propos de : Robert A. Gruendl

University of Illinois, Urbana, Illinois, U.S.A.

A propos de : Barbara A. Whitney

Space Science Institute, Boulder, Colorado, U.S.A.