Red Giant stars in the Large Magellanic Cloud clusters

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dc.creatorMucciarelli, A.
dc.creatorOriglia, L.
dc.creatorFerraro, F. R.
dc.creatorMaraston, C.
dc.creatorTesta, V.
dc.date2006-04-06
dc.date.accessioned2026-07-07T10:43:46Z
dc.date.available2026-07-07T10:43:46Z
dc.descriptionWe present deep J,H,Ks photometry and accurate Color Magnitude Diagrams down to K ~18.5, for a sample of 13 globular clusters in the Large Magellanic Cloud. This data set combined with the previous sample of 6 clusters published by our group gives the opportunity to study the properties of giant stars in clusters with different ages (ranging from ~80 Myr up to ~3.5 Gyr). Quantitative estimates of star population ratios (by number and luminosity) in the Asymptotic Giant Branch, the Red Giant Branch and the He-clump, have been obtained and compared with theoretical models in the framework of probing the so-called phase transitions. The AGB contribution to the total luminosity starts to be significant at ~200 Myr and reaches its maximum at ~5-600 Myr, when the RGB Phase Transition is starting. At ~900 Myr the full developing of an extended and well populated RGB has been completed. Both the occurrence of the AGB and RGB Phase Transitions are sharp events, lasting a few hundreds Myr only. These empirical results agree very well with the theoretical predictions of simple stellar population models based on canonical tracks and the fuel-consumption approach.
dc.description32 pages, 11 figures, accepted to ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0604139
dc.identifierhttp://arxiv.org/abs/astro-ph/0604139
dc.identifierAstrophys.J.646:939-950,2006
dc.identifierdoi:10.1086/504969
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182358
dc.subjectAstrophysics
dc.titleRed Giant stars in the Large Magellanic Cloud clusters
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