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Stellar models: firm evidence, open questions and future developments

Published online by Cambridge University Press:  13 April 2010

Santi Cassisi
Santi Cassisi*
Affiliation:
INAF - Astronomical Observatory of Teramo, Via M. Maggini, 64100 Teramo, Italy email: [email protected]
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Abstract

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During this last decade our knowledge of the evolutionary properties of stars has significantly improved. This result has been achieved thanks to our improved understanding of the physical behavior of stellar matter in the thermal regimes characteristic of the different stellar mass ranges and/or evolutionary stages.

This notwithstanding, the current generation of stellar models is still affected by several, not negligible, uncertainties related to our poor knowledge of some thermodynamical processes and nuclear reaction rates, as well as the efficiency of mixing processes. These drawbacks have to be properly taken into account when comparing theory with observations, to derive evolutionary properties of both resolved and unresolved stellar populations.

In this paper we review the major sources of uncertainty along the main evolutionary stages, and emphasize their impact on population synthesis techniques.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S262: Stellar Populations – Planning for the Next Decade , August 2009 , pp. 13 - 22
Copyright
Copyright © International Astronomical Union 2010

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