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arxiv: astro-ph/0701881 · v1 · submitted 2007-01-30 · 🌌 astro-ph

Stellar Populations in Spiral Galaxies

classification 🌌 astro-ph
keywords galaxiesdiskmetallicitymodelpopulationsspiralstellarable
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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/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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