NOAO >   Observing Info >   Approved Programs >   2012A-0545

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Proposal Information for 2012A-0545


PI: Hui Dong, NOAO, dong.dhdxx@gmail.com
Address: 950 North Cherry Ave., Tucson, AZ 85719, USA

CoI: Angela Cotera, SETI
CoI: Jon Mauerhan, Steward Observatory

Title: Isolated massive star formation in the Galactic Center: Constraining key stellar properties with high-resolution NIR spectroscopy

Abstract: The Galactic center, as our closest galactic nucleus, provides a unique laboratory for studying the processes of star formation in the vicinity of a super massive black hole. The high molecular cloud temperatures, strong magnetic fields, high turbulence, and large tidal forces within the Galactic center, also provide important constraints on star formation models. Our \it HST/NICMOS Paschen-(alpha) survey of the Galactic center has found that there is a significant population of massive stars that are located in relative isolation, well outside of the three well-known massive clusters. Several of these stars are associated with local extended Paschen-(alpha) emission, and are likely still located within their natal environment. These stars seem to indicate that not all massive stars in the Galactic center are formed as part of a massive cluster. We propose to use the Gemini/GNIRS to obtain high resolution spectra of these isolated massive stars, to help us verify and explore their relatioship with the nearby molecular clouds through their line-of-sight velocities, and to constrain the metallicities within the latest generation of stars in the Galactic center.


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 >   2012A-0545

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