NOAO >   Observing Info >   Approved Programs >   2009B-0520

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Proposal Information for 2009B-0520


PI: Katia Cunha, NOAO, kcunha@noao.edu
Address: 950 N. Cherry Ave., Tucson, AZ 85719, US

CoI: Verne V. Smith, NOAO

Title: Chemical Evolution in the Inner Galactic Disk: Abundances in Red Giants of the Massive Cluster GLIMPSE13

Abstract: Infrared surveys, such as 2MASS or Spitzer's GLIMPSE, have found numerous populous young clusters in heavily obscured regions of the Galactic disk. A number of these massive clusters contain large numbers of red giant and supergiant stars. The combination of location and large numbers of red giants makes these clusters particularly useful tools with which to probe the chemistry at key positions in the Galaxy, namely the obscured inner disk regions, some near the nuclear bar. We will obtain high-resolution infrared spectra of red giants in a cluster with R_\rm g=4 kpc, in order to determine quantitative abundances of a set of elements that will allow us to characterize the chemical evolution that has taken place in this poorly studied region of the Milky Way. The chemical abundance distributions towards the inner Galaxy can be compared to the rest of the Galactic disk and provide important boundary conditions on the behavior of metallicity gradients across the disk, as well as characterizing the region that undergoes interaction with the central bar.


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



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