Age-metallicity relation in the LMC

Details Age-metallicity relation in the LMC Age-metallicity relation in the LMC

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26at...20...77k&link_type=abstract

Astronomical and Astrophysical Transactions, vol. 20, Issue 1, pp.77-80

Astronomy and Astrophysics

Astronomy

Magellanic Clouds, Star Clusters, Chemical Evolution

Scientific paper

The age-metallicity relation (AMR) is a very important tool for understanding the chemical evolution of a Galaxy. An observing program for the determination of AMR from a study of small open LMC clusters using Stroemgren photometry has been initiated. The advantage of using open clusters instead of dense globulars is the small central density with better statistics in going to central regions. We report on our search within 8 clusters scattered all over the LMC to cover a wide spatial distribution and metallicity. Stroemgren photometry CMDs have been used in order to find the age of their stellar content. The calibration of the y, b, v magnitudes and colours to metallicity used is the one by Richter et al. (1999). Although our sample is still small, a clear trend is observed in AMR. Comparison with previous AMRs from other investigations and the theoretical models by Pagel and Tautvaisiene (1999) show that within the errors our AMR favours the model assuming burst-like modes of star formation history in LMC.

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