Metallicity Gradient And The Hybrid Formation Scenario For Early-Type Galaxies

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dc.creatorOgando, Ricardo L. C.
dc.creatorMaia, Marcio A. G.
dc.creatorChiappini, Cristina
dc.creatorPellegrini, Paulo S. S.
dc.creatorSchiavon, Ricardo P.
dc.creatorda Costa, Luiz N.
dc.date2006-02-18
dc.date.accessioned2026-07-07T07:00:47Z
dc.date.available2026-07-07T07:00:47Z
dc.descriptionWe present radial gradients of the Lick index Mg2 for 40 early-type galaxies. In plots of Grad(Mg2) versus mass indicators, such as log(sigma), the lower boundary of the points distribution may be populated by galaxies which predominantly formed by monolithic collapse. Galaxies showing flatter gradients at higher masses could represent objects which suffered important merging episodes. Thus, our results support a hybrid formation scenario. To remove possible age effects, we computed metallicity gradients (Grad[Z/H]) using Mg2 and Hbeta indices for an [alpha/Fe]=0.3 single stellar population model. The conclusions remain the same.
dc.description2 pages, 2 figures, contributed talk to the 11th Latin American Regional IAU meeting, Pucon, Chile 2005. To be published by Revista Mexicana de Astronomia y Astrofisica, Conference Series (rmaa.cls)
dc.identifierhttps://arxiv.org/abs/astro-ph/0602416
dc.identifierhttp://arxiv.org/abs/astro-ph/0602416
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108082
dc.subjectAstrophysics
dc.titleMetallicity Gradient And The Hybrid Formation Scenario For Early-Type Galaxies
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