Stellar Populations in Spiral Galaxies

Details Stellar Populations in Spiral Galaxies Stellar Populations in Spiral Galaxies

2007-01-30

arxiv.org/abs/astro-ph/0701881v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures. To appear in the proceedings for IAUS 241 "Stellar Populations as Building Blocks of Galaxies", Eds. R.F.

Scientific paper

10.1017/S1743921307008824

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/Ang > 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 and flux calibration), we are able constrain real signatures of age and metallicity gradients in star-forming galaxies.

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