Detailed slit spectrophotometry in the range 3700 - 7200 Å is presented for the nucleus and seven different positions in NGC 5253. Population synthesis models show that NGC 5253 is highly composed in age and characterized by a strong gradient in the sense that the blue components become not only stronger but younger towards the center. The old population substratum is metal deficient [Z/Z0] < -0.5. A similar abundance is derived for the gas with no spatial variations.
Revista Mexicana de Astronomia y Astrofisica, vol. 21
- Pub Date:
- November 1990
- Spiral Galaxies: Spectra;
- Spiral Galaxies: Stellar Populations