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dc.contributor.authorJeffries, RD
dc.contributor.authorJackson, RJ
dc.contributor.authorFranciosini, E
dc.contributor.authorRandich, S
dc.contributor.authorBarrado, D
dc.contributor.authorFrasca, A
dc.contributor.authorKlutsch, A
dc.contributor.authorLanzafame, AC
dc.contributor.authorPrisinzano, L
dc.contributor.authorSacco, GG
dc.contributor.authorGilmore, G
dc.contributor.authorVallenari, A
dc.contributor.authorAlfaro, EJ
dc.contributor.authorKoposov, SE
dc.contributor.authorPancino, E
dc.contributor.authorBayo, A
dc.contributor.authorCasey, AR
dc.contributor.authorCostado, MT
dc.contributor.authorDamiani, F
dc.contributor.authorHourihane, A
dc.contributor.authorLewis, J
dc.contributor.authorJofre, P
dc.contributor.authorMagrini, L
dc.contributor.authorMonaco, L
dc.contributor.authorMorbidelli, L
dc.contributor.authorWorley, CC
dc.contributor.authorZaggia, S
dc.contributor.authorZwitter, T
dc.date.accessioned2017-05-15T20:18:32Z
dc.date.available2017-05-15T20:18:32Z
dc.date.issued2017-01
dc.identifier.citationMonthly Notices of the Royal Astronomical Society 464(2), pp. 1456-1465es_CL
dc.identifier.issn0035-8711
dc.identifier.otherhttps://doi.org/10.1093/mnras/stw2458
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/3397
dc.descriptionIndexación: Web of Science; Scopus; Scielo.es_CL
dc.description.abstractWe show that non-magnetic models for the evolution of pre-main-sequence (PMS) stars cannot simultaneously describe the colour-magnitude diagram (CMD) and the pattern of lithium depletion seen in the cluster of young, low-mass stars surrounding gamma(2) Velorum. The age of 7.5 +/- 1 Myr inferred from the CMD is much younger than that implied by the strong Li depletion seen in the cluster M-dwarfs, and the Li depletion occurs at much redder colours than predicted. The epoch at which a star of a given mass depletes its Li and the surface temperature of that star are both dependent on its radius. We demonstrate that if the low-mass stars have radii similar to 10 per cent larger at a given mass and age, then both the CMD and the Li-depletion pattern of the Gamma Velorum cluster are explained at a common age of similar or equal to 18-21 Myr. This radius inflation could be produced by some combination of magnetic suppression of convection and extensive cool starspots. Models that incorporate radius inflation suggest that PMS stars, similar to those in the Gamma Velorum cluster, in the range 0.2 < M/M-circle dot < 0.7, are at least a factor of 2 older and similar to 7 per cent cooler than previously thought and that their masses are much larger (by > 30 per cent) than inferred from conventional, non-magnetic models in the Hertzsprung-Russell diagram. Systematic changes of this size may be of great importance in understanding the evolution of young stars, disc lifetimes and the formation of planetary systems.es_CL
dc.description.urihttps://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stw2458
dc.language.isoenes_CL
dc.publisherOXFORD UNIV PRESSes_CL
dc.subjectStars: evolutiones_CL
dc.subjectStars: low-masses_CL
dc.subjectStars: magnetic fieldes_CL
dc.subjectStars: pre-main-sequencees_CL
dc.subjectStarspotses_CL
dc.subjectOpen clusters and associations: generales_CL
dc.titleThe Gaia-ESO Survey: lithium depletion in the Gamma Velorum cluster and inflated radii in low-mass pre-main-sequence starses_CL
dc.typeArticlees_CL


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