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Convective Overshooting: New Integrated Colours vs. Age Relations for Star Clusters

Published online by Cambridge University Press:  04 August 2017

G. Bertelli ,
A.G. Bressan ,
C. Chiosi ,
E. Nasi  and
L. Pigatto
G. Bertelli
Affiliation:
Institute of Astronomy, Padova, Italy
A.G. Bressan
Affiliation:
Institute of Astronomy, Padova, Italy
C. Chiosi
Affiliation:
Institute of Astronomy, Padova, Italy
E. Nasi
Affiliation:
Institute of Astronomy, Padova, Italy
L. Pigatto
Affiliation:
Institute of Astronomy, Padova, Italy

Extract

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If the integrated colours of a star cluster mainly depend on chemical composition and age, then theoretical calibrations of colours as function of age for different chemical compositions are very useful to obtain quantitative determinations of the age and composition of individual clusters, and thus to trace the chemical history of nearby galaxies. Several calibration curves exist in the literature which rest on the standard theory of stellar evolution. However, a growing amount of observational evidence seems to indicate that overshooting from convective cores may be an important phenomenon in stellar evolution. In fact models computed with overshooting are significantly different from the standard ones. The aim of this preliminary investigation is to study the effects of convective overshooting on the integrated colours of clusters whose turnoff mass is in that range in which convective overshooting is effective.

Type
Poster Papers - Sessions 7 and 8
Information
Symposium - International Astronomical Union , Volume 116 , 1986 , pp. 511 - 512
Copyright
Copyright © 1986 

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