NOAO >   Observing Info >   Approved Programs >   2013A-0181

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Proposal Information for 2013A-0181


PI: Matthew S. Povich, Cal Poly Pomona, mspovich@csupomona.edu
Address: Physics Department, 3801 W Temple Ave, Pomona, CA 91768, USA

CoI: M. Virginia McSwain, Lehigh University

Title: They Might Be Giants: Confirming Candidate OB Stars While Netting a Large Sample of Massive Star Spectra in the Great Nebula in Carina

Abstract: We propose one night of observations with the AAOmega instrument on the Anglo-Australian Telescope to obtain spectra of a large sample of massive stars in the Great Nebula in Carina, the nearest analog of extragalactic starburst regions. Our targets include >100 spectroscopically classified OB stars plus 55 candidate OB stars that we recently identified via X-ray emission and infrared (IR) spectral energy distributions (SEDs). These observations will confirm or reject individual candidate OB stars as massive members of the Carina Nebula stellar population, a vital test for our methodology that will pave the way to discovering new massive stars in other regions. Determining the nature of the candidate OB stars is critical to any census of the massive stellar population in Carina, impacting our understanding of the energetics and stellar initial mass function in this well-studied region. We will employ spectral modeling and broadband optical-IR SED fitting to derive physical properties (e.g. temperature, bolometric luminosity, surface gravity, and mass) of the known OB stars and those newly-confirmed candidate OB stars with high (\ga100) signal-to- noise spectra.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2013A-0181

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