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dc.contributor.authorGullieuszik, M.
dc.contributor.authorGroenewegen, M.A.T.
dc.contributor.authorCioni, M-R.L.
dc.contributor.authorde Grijs, R.
dc.contributor.authorvan Loon, J. Th
dc.contributor.authorGirardi, L.
dc.contributor.authorIvanov, V.D.
dc.contributor.authorOliveira, J.M.
dc.contributor.authorEmerson, J.P.
dc.contributor.authorGuandalini, R.
dc.date.accessioned2012-08-06T11:00:23Z
dc.date.available2012-08-06T11:00:23Z
dc.date.issued2012-01
dc.identifier.citationGullieuszik , M , Groenewegen , M A T , Cioni , M-RL , de Grijs , R , van Loon , J T , Girardi , L , Ivanov , V D , Oliveira , J M , Emerson , J P & Guandalini , R 2012 , ' The VMC survey III : Mass-loss rates and luminosities of LMC AGB stars ' , Astronomy & Astrophysics , vol. 537 , A105 . https://doi.org/10.1051/0004-6361/201117493
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 948276
dc.identifier.otherPURE UUID: 422ac225-0f74-4484-8888-e499316422ea
dc.identifier.otherWOS: 000300416800105
dc.identifier.otherScopus: 84855969026
dc.identifier.urihttp://hdl.handle.net/2299/8803
dc.description.abstractContext. Asymptotic giant branch (AGB) stars are major contributors to both the chemical enrichment of the interstellar medium and the integrated light of galaxies. Despite its importance, the AGB is one of the least understood phases of stellar evolution. The main difficulties associated with detailed modelling of the AGB are related to the mass-loss process and the 3rd dredge-up efficiency Aims. We provide direct measures of mass-loss rates and luminosities for a complete sample of AGB stars in the Large Magellanic Cloud, disentangling the C- and O-rich stellar populations. Methods. Dust radiative transfer models are presented for all 374 AGB stars candidates in one of the fields observed by the new VISTA survey of the Magellanic Clouds (VMC). Mass-loss rates, luminosities and a classification of C-and O-rich stars are derived by fitting the models to the spectral energy distribution (SED) obtained by combining VMC data with existing optical, near-, and mid-infrared photometry. Results. The classification technique is reliable at a level of - at worst -75% and significantly better for the reddest dusty stars. We classified none of the stars with a relevant mass-loss rate as O-rich, and we can exclude the presence of more than one dusty O-rich star at a similar to 94% level. The bolometric luminosity function we obtained is fully consistent with most of the literature data on the LMC and with the prediction of theoretical models, with a peak of the C-star distribution at M-bol similar or equal to -4.8 mag and no stars brighter than the classical AGB tip, at M-bol = -7.1 mag. Conclusions. This exploratory study shows that our method provides reliable mass-loss rates, luminosities and chemical classifications for all AGB stars. These results offer already important constraints to AGB evolutionary models. Most of our conclusions, especially for the rarer dust-enshrouded extreme AGB stars, are however strongly limited by the relatively small area covered by our study. Forthcoming VMC observations will easily remove this limitation.en
dc.format.extent60
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysics
dc.titleThe VMC survey III : Mass-loss rates and luminosities of LMC AGB starsen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1051/0004-6361/201117493
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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