MASSIVE STAR FORMATION in the LMC. I. N159 and N160 COMPLEXES

Michael S. Gordon, Terry J Jones, Robert D Gehrz, L. Andrew Helton

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Abstract

We present images and spectral energy distributions (SEDs) of massive young stellar objects (YSOs) in three star-forming H ii regions of the Large Magellanic Cloud: N159A, N159 Papillon, and N160. We use photometry from SOFIA/FORCAST at 25.3-37.1 μm to constrain model fits to the SEDs and determine luminosities, ages, and dust content of the embedded YSOs and their local environments. By placing these sources on mid-infrared color-magnitude and color-color diagrams, we analyze their dust properties and consider their evolutionary status. Since each object in the FORCAST images has an obvious bright near-infrared counterpart in Spitzer Space Telescope images, we do not find any evidence for new, very cool, previously undiscovered Class 0 YSOs. Additionally, based on its mid-infrared colors and model parameters, N159A is younger than N160 and the Papillon. The nature of the first extragalactic protostars in N159, P1, and P2, is also discussed.

Original languageEnglish (US)
Article number122
JournalAstrophysical Journal
Volume834
Issue number2
DOIs
StatePublished - Jan 10 2017

Bibliographical note

Funding Information:
This development has been supported by the funding agencies BMVIT (Austria), ESA-PRODEX (Belgium), CEA/CNES (France), DLR (Germany), ASI/INAF (Italy), and CICYT/MCYT (Spain). Facilities: Herschel/PACS, SOFIA/FORCAST, Spitzer/IRAC.

Keywords

  • H II regions
  • Magellanic Clouds
  • stars: formation

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