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Near-infrared line-strengths in elliptical galaxies: evidence for initial mass function variations?

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dc.contributor.authorCenarro, A. J.
dc.contributor.authorGorgas García, Francisco Javier
dc.contributor.authorVazdekis, A.
dc.contributor.authorCardiel López, Nicolás
dc.contributor.authorPeletier, R. F.
dc.date.accessioned2023-06-20T10:51:20Z
dc.date.available2023-06-20T10:51:20Z
dc.date.issued2003-02-11
dc.descriptionThis article has been accepted for publication in Monthly notices of the Royal Astronomical Society. © 2003 RAS. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. We are indebted to the anonymous referee for very useful suggestions. This work was supported by the Spanish research project No. AYA2000-977.
dc.description.abstractWe present new relations between recently defined line-strength indices in the near-infrared (CaT*, CaT, PaT, MgI and sTiO) and central velocity dispersion (sigma(0) ) for a sample of 35 early-type galaxies, showing evidence for significant anti-correlations between Ca ii triplet indices (CaT* and CaT) and log sigma(0). These relations are interpreted in the light of our recent evolutionary synthesis model predictions, suggesting the existence of important Ca underabundances with respect to Fe and/or an increase of the dwarf to giant stars ratio along the mass sequence of elliptical galaxies.
dc.description.departmentDepto. de Física de la Tierra y Astrofísica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipSpanish research project
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/29716
dc.identifier.doi10.1046/j.1365-8711.2003.06360.x
dc.identifier.issn0035-8711
dc.identifier.officialurlhttp://dx.doi.org/10.1046/j.1365-8711.2003.06360.x
dc.identifier.relatedurlhttp://mnras.oxfordjournals.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/51343
dc.issue.number1
dc.journal.titleMonthly notices of the Royal Astronomical Society
dc.language.isoeng
dc.page.finalL16
dc.page.initialL12
dc.publisherWiley
dc.relation.projectIDAYA2000-977
dc.rights.accessRightsopen access
dc.subject.cdu52
dc.subject.keywordPopulation synthesis model
dc.subject.keywordStellar populations
dc.subject.keywordCAII triplet
dc.subject.keywordEmpirical calibration
dc.subject.keywordStar-clusters
dc.subject.keywordNuclei
dc.subject.keywordFeatures
dc.subject.keywordAbsorption
dc.subject.keywordParameters
dc.subject.keywordSpheroids
dc.subject.ucmAstrofísica
dc.subject.ucmAstronomía (Física)
dc.titleNear-infrared line-strengths in elliptical galaxies: evidence for initial mass function variations?
dc.typejournal article
dc.volume.number339
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