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Astron. Astrophys. 353, 771-774 (2000)

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Research Note

About the time of evolution of a solar model

P. Morel, J. Provost and G. Berthomieu

Département Cassini, UMR CNRS 6529, Observatoire de la Côte d'Azur, B.P. 4229, 06304 Nice CEDEX 4, France

Received 26 July 1999 / Accepted 20 October 1999


The evolution of a solar model is initialized with homogeneous models of either, pre-main sequence (P-models) or, zero-age main sequence (Z-models). The zero-age of a solar model is conventionally referenced as the time where the nuclear reactions just begin to dominate gravitation as the primary source of energy. Fixing the physics, we found that the structure of P- and Z-models computed with the same physics are almost similar soon after the exhaustion of their convective core. This similarity gives a connection between the age of the Sun [FORMULA] and the time [FORMULA] elapsed in the calculation of calibrated solar models. We found that a Z-model calibrated with [FORMULA] and a P-model calibrated with [FORMULA] My, are indistinguishable at the relative accuracy level of a few [FORMULA].

Key words: Sun: evolution – Sun: fundamental parameters – Sun: interior

Send offprint requests to: P. Morel (morel@obs-nice.fr)

This article contains no SIMBAD objects.


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© European Southern Observatory (ESO) 2000

Online publication: December 17, 1999