NOAO >   Observing Info >   Approved Programs >   2005B-0513

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Proposal Information for 2005B-0513


PI: You-Hua Chu, University of Illinois, chu@astro.uiuc.edu
Address: Department of Astronomy, 1002 W. Green St., Urbana, IL 60801, U.S.A.

CoI: Robert Gruendl, Univeristy of Illinois
CoI: Rosie Chen, University of Illinois
CoI: Sean Points, NOAO/CTIO
CoI: Joel Parker, Southwest Research Institute
CoI: Chris Smith, NOAO/CTIO

Title: The On-Going Star Formation in HII Complexes in the Large Magellanic Cloud

Abstract: Massive star formation plays an important role in the evolution of galaxies. The Large Magellanic Cloud (LMC), at a distance of 50 kpc with a nearly face-on orientation, provides an excellent site to study massive star formation. We have obtained \it Spitzer Space Telescope observations of 7 HII complexes in the LMC. These observations reveal a large number of previously-unknown and optically-invisible proto-stars in and around these HII complexes. The wide-spread on-going star formation indicates that studies of massive stellar content need to cover areas much larger than previous studies; therefore, we request CTIO 4m MOSAIC observations of LMC HII complexes in the UBVI bands. We also request 4m ISPI observations in the JHK' bands in order to assess the multiplicity and constrain physical nature of the proto- stars. These proposed CTIO observations will be used in conjunction with deep \it Spitzer IRAC and MIPS observations and detailed multi- wavelength observations of the ISM for a comprehensive analysis of (1) relationships between initial interstellar conditions and final stellar product, (2) propagation of star formation over spatial scales of ~500 pc, and (3) impact of prolonged star formation on the determination of IMFs.


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