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The ages of stars: The horizontal branch

Published online by Cambridge University Press:  01 October 2008

M. Catelan
M. Catelan*
Affiliation:
Pontificia Universidad Católica de Chile, Departamento de Astronomía y Astrofísica, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile email: mcatelan@astro.puc.cl
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Abstract

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Horizontal branch (HB) stars play a particularly important role in the “age debate,” since they are at the very center of the long-standing “second parameter” problem. In this review, I discuss some recent progress in our understanding of the nature and origin of HB stars.

Keywords

stars: abundancesevolutionHertzsprung-Russell diagramhorizontal branchmass lossvariables: otherGalaxy: formationglobular clusters: generalglobular clusters: individual (M3, M13, NGC 1851)galaxies: dwarf
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S258: The Ages of Stars , October 2008 , pp. 209 - 220
Copyright
Copyright © International Astronomical Union 2009

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