Automatic observation rendering (AMORE) - I. On a synthetic stellar population's colour-magnitude diagram

Y K Ng*, E. Brogt, C Chiosi, G Bertelli

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)

Abstract

A new method, AMORE - based on a genetic algorithm optimizer, is presented for the automated study of colour-magnitude diagrams. The method combines several stellar population synthesis tools developed in the last decade by or in collaboration with the Padova group. Our method is able to recover, within the uncertainties, the parameters - distance, extinction, age, metallicity, index of a power-law initial mass function and the index of an exponential star formation rate - from a reference synthetic stellar population. No a priori information is inserted to recover the parameters, which is done simultaneously and not one at a time. Examples are given to demonstrate and to better understand biases in the results, if one of the input parameters is deliberately set fixed to a non-optimum value.

Original languageEnglish
Pages (from-to)1129-1147
Number of pages19
JournalAstronomy & Astrophysics
Volume392
Issue number3
DOIs
Publication statusPublished - Sept-2002

Keywords

  • methods : data analysis, numerical
  • stars : HR-diagram, statistics
  • LARGE-MAGELLANIC-CLOUD
  • STAR-FORMATION HISTORY
  • GRAVITATIONAL LENSING EXPERIMENT
  • SPECTRO-PHOTOMETRIC EVOLUTION
  • INTERMEDIATE-MASS STARS
  • ELLIPTIC GALAXIES
  • RADIATIVE OPACITIES
  • GALACTIC STRUCTURE
  • INTERSTELLAR EXTINCTION
  • THEORETICAL ISOCHRONES

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