Stellar Population Analysis of Galaxies based on Genetic Algorithms

We present a new method for determining the age and relative contribution of different stellar populations in galaxies based on the genetic algorithm.We apply this method to the barred spiral galaxy NGC 3384, using CCD images in U, B, V, R and I bands. This analysis indicates that the galaxy NGC 338...

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Bibliographic Details
Published in:Chinese journal of astronomy and astrophysics 2005-08, Vol.5 (4), p.347-355
Main Authors: Attia, Abdel-Fattah, Ismail, H. A, Selim, I. M, Osman, A. M, Isaa, I. A, Marie, M. A, Shaker, A. A
Format: Article
Language:English
Subjects:
空间分布
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Summary:We present a new method for determining the age and relative contribution of different stellar populations in galaxies based on the genetic algorithm.We apply this method to the barred spiral galaxy NGC 3384, using CCD images in U, B, V, R and I bands. This analysis indicates that the galaxy NGC 3384 is mainly inhabited by old stellar population （age 〉 10^9 yr）. Some problems were encountered when numerical simulations are used for determining the contribution of different stellar populations in the integrated color of a galaxy. The results show that the proposed genetic algorithm can search efficiently through the very large space of the possible ages.
ISSN:1009-9271
DOI:10.1088/1009-9271/5/4/002