NOAO >   Observing Info >   Approved Programs >   2013A-0488

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Proposal Information for 2013A-0488


PI: Michael Lundquist, University of Wyoming, mlundqui@uwyo.edu
Address: Department of Physics and Astronomy, 1000 E. University, Laramie, WY 82071, United States

CoI: Henry Kobulnicky, University of Wyoming
CoI: Charles Kerton, Iowa State University

Title: Investigating the Intermediate-Mass Stars that Power Intermediate-Mass Star-Forming Regions

Abstract: High-mass star formation cannot be viewed as simply a scaled-up version of the paradigm for low-mass star formation. The high-mass regime (M> 8\msun) appears to require significant differences in cloud fragmentation, accretion, radiation, turbulence, and overall molecular density compared to the low-mass regime (M< 2\msun). We have identified a sample of intermediate-mass star-forming regions (IMSFRs) that appear to produce stars up to, but not exceeding a B3 star. These regions host embedded clusters that straddle the boundary between the high- and low-mass regimes. We propose HK band spectroscopy on the brightest stellar sources within a sample of 16 IMSFRs to 1) identify probable members, 2) confirm the intermediate-mass nature of the most massive stars, 3) characterize their evolutionary state, 4) derive spectro-photometric distances, and 5) determine the extinction toward each region.


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NOAO >   Observing Info >   Approved Programs >   2013A-0488

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