Heavy element diffusion and globular cluster ages

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dc.creatorCastellani, V.
dc.creatorCiacio, F.
dc.creatorDegl'Innocenti, S.
dc.creatorFiorentini, G.
dc.date1997-05-06
dc.date.accessioned2026-07-07T02:23:20Z
dc.date.available2026-07-07T02:23:20Z
dc.descriptionThis paper discusses low mass, metal poor stars, presenting new evolutionary computations which take into account the inward diffusion of both He and heavy elements during the H burning phase. The investigation has been extended to He burning models, discussing the luminosity of the Zero Age Horizontal Branch (ZAHB) models originated from progenitors with efficient element diffusion. We find that diffusion of heavy elements plays a non-negligible role in the evolutionary paths of the model. One finds that element diffusion has a sensitive influence on evolutionary models, a less significant effect on the isochrone turn off and, finally, a rather marginal impact on the difference in luminosity between the ZAHB and the isochrone Turn-Off (TO). The consequences of these results on current evaluations of globular cluster ages are discussed in connection with possible sources of errors.
dc.description15 pages, Tex, 3 latex tables, postscript figures, in publication on Astronomy and Astrophysics
dc.identifierhttps://arxiv.org/abs/astro-ph/9705035
dc.identifierhttp://arxiv.org/abs/astro-ph/9705035
dc.identifierAstron. astrophys. 123 (1997) 449
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/11209
dc.subjectAstrophysics
dc.titleHeavy element diffusion and globular cluster ages
dc.typetext

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