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dc.contributor.authorTamura, N
dc.contributor.authorKobayashi, Chiaki
dc.contributor.authorArimoto, N
dc.contributor.authorOhta, K
dc.contributor.authorKodama, Tadayuki
dc.date.accessioned2011-12-15T13:01:14Z
dc.date.available2011-12-15T13:01:14Z
dc.date.issued2000-05
dc.identifier.citationTamura , N , Kobayashi , C , Arimoto , N , Ohta , K & Kodama , T 2000 , ' Origin of color gradients in elliptical galaxies ' , The Astronomical Journal , vol. 119 , no. 5 , pp. 2134-2145 . https://doi.org/10.1086/301333
dc.identifier.issn0004-6256
dc.identifier.otherPURE: 496015
dc.identifier.otherPURE UUID: b0ba68a7-ee38-4b14-9f65-b7cc65fdc25f
dc.identifier.otherWOS: 000087311300010
dc.identifier.otherScopus: 3042939417
dc.identifier.otherORCID: /0000-0002-4343-0487/work/62750460
dc.identifier.urihttp://hdl.handle.net/2299/7298
dc.description.abstractThe origin of color gradients in elliptical galaxies is examined by comparing model gradients with those observed in the Hubble Deep Field. The models are constructed so as to reproduce color gradients in local elliptical galaxies either by a metallicity gradient or by an age gradient. By looking-back a sequence of the color gradient as a function of redshift, the age-metallicity degeneracy is solved. The observed color gradients in elliptical galaxies at z = 0.1 to 1.0 agree excellently with those predicted by the metallicity gradient, while they deviate significantly from those predicted by the age gradient even at z similar to 0.3, and the deviation becomes larger with increasing redshift. This result does not depend on cosmological parameters and parameters for an evolutionary model of an elliptical galaxy within a reasonable range. Thus our results clearly indicate that the origin of color gradients is not age but stellar metallicity.en
dc.format.extent12
dc.language.isoeng
dc.relation.ispartofThe Astronomical Journal
dc.subjectgalaxies : elliptical and lenticular, cD
dc.subjectgalaxies : evolution
dc.subjectgalaxies : formation
dc.subjectHUBBLE-DEEP-FIELD
dc.subjectSURFACE PHOTOMETRY
dc.subjectMETALLICITY GRADIENTS
dc.subjectMAGNITUDE RELATION
dc.subjectEVOLUTION
dc.subjectSUPERNOVAE
dc.subjectDUST
dc.subjectFE
dc.titleOrigin of color gradients in elliptical galaxiesen
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/10.1086/301333
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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