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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27546
DC FieldValueLanguage
dc.contributor.authorSARACCO, Paoloen_US
dc.contributor.authorGARGIULO, ADRIANAen_US
dc.contributor.authorCiocca, F.en_US
dc.contributor.authorMarchesini, D.en_US
dc.date.accessioned2020-10-02T09:42:06Z-
dc.date.available2020-10-02T09:42:06Z-
dc.date.issued2017en_US
dc.identifier.issn0004-6361en_US
dc.identifier.urihttp://hdl.handle.net/20.500.12386/27546-
dc.description.abstractAims: The aim of this work is twofold: first, to assess whether the population of elliptical galaxies in cluster at z 1.3 differs from the population in the field and whether their intrinsic structure depends on the environment where they belong; second, to constrain their properties 9 Gyr back in time through the study of their scaling relations. Methods: We compared a sample of 56 cluster elliptical galaxies selected from three clusters at 1.2 <z < 1.4 with elliptical galaxies selected at comparable redshift in the GOODS-South field ( 30), in the COSMOS area ( 180), and in the CANDELS fields ( 220). To single out the environmental effects, we selected cluster and field elliptical galaxies according to their morphology. We compared physical and structural parameters of galaxies in the two environments and we derived the relationships between effective radius, surface brightness, stellar mass, and stellar mass density Σ_Re within the effective radius and central mass density Σ_1 kpc, within 1 kpc radius. Results: We find that the structure and the properties of cluster elliptical galaxies do not differ from those in the field: they are characterized by the same structural parameters at fixed mass and they follow the same scaling relations. On the other hand, the population of field elliptical galaxies at z 1.3 shows a significant lack of massive (ℳ∗> 2 × 10^11 M☉<) and large (Re> 4-5 kpc) elliptical galaxies with respect to the cluster. Nonetheless, at ℳ∗< 2 × 10^11 M☉, the two populations are similar. The size-mass relation of cluster and field ellipticals at z 1.3 clearly defines two different regimes, above and below a transition mass mt ≃ 2-3 × 10^10 M☉: at lower masses the relation is nearly flat, the mean radius is nearly constant at 1 kpc and, consequenly, Σe ≃ Σ1 kpc while, at larger masses, the relation is Re ∝ Μ*^(0.64±0.09). The transition mass marks the mass at which galaxies reach the maximum stellar mass density. Also the Σ1 kpc-mass relation follows two different regimes, above and below the transition mass defining a transition mass density Σ1 kpc≃ 2-3 × 10^3 M☉> pc^-2. The effective stellar mass density Σe does not correlate with mass; dense/compact galaxies can be assembled over a wide mass regime, independently of the environment. The central stellar mass density, Σ1 kpc, besides being correlated with the mass, is correlated to the age of the stellar population: the higher the central stellar mass density, the higher the mass, the older the age of the stellar population. Conclusions: While we found some evidence of environmental effects on the elliptical galaxies as a population, we did not find differences between the intrinsic properties of cluster and field elliptical galaxies at comparable redshift. The structure and the shaping of elliptical galaxies at z 1.3 do not depend on the environment. However, a dense environment seems to be more efficient in assembling high-mass large ellipticals, much rarer in the field at this redshift. The correlation found between the central stellar mass density and the age of the galaxies beside the mass shows the close connection of the central regions to the main phases of mass growth.en_US
dc.language.isoengen_US
dc.titleCluster and field elliptical galaxies at z ~ 1.3. The marginal role of the environment and the relevance of the galaxy central regionsen_US
dc.typeArticle-
dc.identifier.doi10.1051/0004-6361/201628866en_US
dc.identifier.scopus2-s2.0-85009776483en_US
dc.identifier.isi000392392900058en_US
dc.identifier.urlhttps://www.aanda.org/articles/aa/abs/2017/01/aa28866-16/aa28866-16.htmlen_US
dc.relation.mediumSTAMPAen_US
dc.relation.volume597en_US
dc.relation.firstpageA122en_US
dc.type.refereeREF_1en_US
dc.description.numberofauthors4en_US
dc.description.internationalsìen_US
dc.contributor.countryITAen_US
dc.contributor.countryUSAen_US
dc.relation.scientificsectorFIS/05 - ASTRONOMIA E ASTROFISICAen_US
dc.relation.journalASTRONOMY & ASTROPHYSICSen_US
dc.type.miur262 Articolo in rivista-
dc.identifier.adsbibcode2017A&A...597A.122Sen_US
dc.description.apcnoen_US
dc.description.oa1 – prodotto con file in versione Open Access (allegare il file al passo  5-Carica)en_US
item.grantfulltextopen-
item.languageiso639-1en-
item.fulltextWith Fulltext-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
crisitem.journal.journalissn0004-6361-
crisitem.journal.anceE016240-
crisitem.author.deptO.A. Brera-
crisitem.author.deptIASF Milano-
crisitem.author.orcid0000-0003-3959-2595-
crisitem.author.orcid0000-0002-3351-1216-
Appears in Collections:1.01 Articoli in rivista
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