Stellar Metallicity Distributions and Kinematics in M33

Details Stellar Metallicity Distributions and Kinematics in M33 Stellar Metallicity Distributions and Kinematics in M33

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005noao.prop..352g&link_type=abstract

NOAO Proposal ID #2005B-0352

Computer Science

Scientific paper

We propose to obtain Ca II triplet measurements of red giant stars in the Local Group spiral galaxy M33 with GMOS. These measurements will be used to measure metallicities and radial velocities for the giants in four fields ranging from 1 to 5 disk scale lengths from the center of M33. These data will be combined with color-magnitude data that we have obtained for these fields with the ACS on HST; we will use the metallicity and velocity data to derive the metallicity distribution for each field, the metallicity gradient and its variation with time, and the velocity dispersion of the old stellar populations as a function of age and metallicity. The metallicity information from our spectra will provide an important constraint on the star formation histories we are deriving from the HST color-magnitude diagrams. Ultimately, we will use this data to build a comprehensive empirical model for the chemical and dynamical evolution of M33, which can be compared with ab initio models.

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