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Stellar Populations in Spiral Galaxies

Published online by Cambridge University Press:  01 December 2006

Lauren A. MacArthur ,
Jesús J. González  and
Stéphane Courteau
Lauren A. MacArthur
Affiliation:
California Institute of Technology, Pasadena CA 91125, USA email: lam@astro.caltech.edu
Jesús J. González
Affiliation:
Instituto de Astronomía, UNAM, Mexico
Stéphane Courteau
Affiliation:
Queen's University, Kingston, ON K7L 3N6, Canada
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Abstract

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We report preliminary results of the characterization of bulge and inner disk stellar populations for 8 nearby spiral galaxies using Gemini/GMOS. The long-slit spectra extend out to 1–2 disk scale lengths with S/N/Å>50. Two different model fitting techniques, absorption-line indices and full spectral synthesis, are found to weigh age, metallicity, and abundance ratios differently, but with careful attention to the data/model matching (resolution & flux calibration), we are able constrain real signatures of age and metallicity gradients in star-forming galaxies.

Keywords

galaxies: abundancesgalaxies: spiralgalaxies: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 480 - 484
Copyright
Copyright © International Astronomical Union 2007

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