NOAO >   Observing Info >   Approved Programs >   2003B-0209

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Proposal Information for 2003B-0209


PI: David L. Lambert, University of Texas at Austin, dll@astro.as.utexas.edu
Address: Department of Astronomy, RLM 15.308, Austin, TX 78712-1083, USA

CoI: Kjell Eriksson, Uppsala University
CoI: Bengt Gustafsson, Uppsala University
CoI: Kenneth H. Hinkle, NOAO
CoI: Nils Ryde, Uppsala University
CoI: Rurik Wahlin, Uppsala University
CoI: Bengt Westerlund, Uppsala University

Title: Carbon Stars in the Local Group -- Detailed Abundance Analysis of Carbon Stars in the LMC

Abstract: Using the Phoenix on Gemini we propose to observe a sample of carbon stars in the LMC in four different wavelength regions at high spectral resolution and with high S/N. The spectra will provide CO, CN, and C_2 and atomic lines from which elemental and isotopic C, N, and O abundances and metal abundances will be derived by an approach similar to that previously used for Galactic field carbon stars (Lambert et al. 1986). We will then be able to calibrate lower resolution spectra of carbon stars in other Local Group galaxies. The observational study of carbon stars is a key to understanding late evolutionary stages and nucleosynthesis of low mass stars. The current proposal is a continuation; spectra in the 2.22 (micron) region were recently obtained, see page 3.


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