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dc.contributor.authorKarukes, E. V. [UNESP]
dc.contributor.authorSalucci, P.
dc.date.accessioned2018-12-11T17:10:32Z
dc.date.available2018-12-11T17:10:32Z
dc.date.issued2017-01-01
dc.identifierhttp://dx.doi.org/10.1093/mnras/stw3055
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, v. 465, n. 4, p. 4703-4722, 2017.
dc.identifier.issn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttp://hdl.handle.net/11449/174324
dc.description.abstractWe use the concept of the spiral rotation curves universality to investigate the luminous and dark matter properties of the dwarf disc galaxies in the local volume (size ~11 Mpc). Our sample includes 36 objects with rotation curves carefully selected from the literature. We find that, despite the large variations of our sample in luminosities (~2 of dex), the rotation curves in specifically normalized units, look all alike and lead to the lower mass version of the universal rotation curve of spiral galaxies found in Persic et al. We mass model the double normalized universal rotation curve V(R/Ropt)/Vopt of dwarf disc galaxies: the results show that these systems are totally dominated by dark matter whose density shows a core size between 2 and 3 stellar disc scalelengths. Similar to galaxies of different Hubble types and luminosities, the core radius r0 and the central density ρ0 of the dark matter halo of these objects are related by ρ0r0 ~ 100M⊙ pc-2. The structural properties of the dark and luminous matter emerge very well correlated. In addition, to describe these relations, we need to introduce a new parameter, measuring the compactness of light distribution of a (dwarf) disc galaxy. These structural properties also indicate that there is no evidence of abrupt decline at the faint end of the baryonic to halo mass relation. Finally, we find that the distributions of the stellar disc and its dark matter halo are closely related.en
dc.format.extent4703-4722
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.sourceScopus
dc.subjectDark matter
dc.subjectGalaxies: dwarf
dc.subjectGalaxies: formation
dc.subjectGalaxies: haloes
dc.subjectGalaxies: kinematics and dynamics
dc.titleThe universal rotation curve of dwarf disc galaxiesen
dc.typeArtigo
dc.contributor.institutionSISSA International School for Advanced Studies
dc.contributor.institutionSezione di Trieste
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.description.affiliationSISSA International School for Advanced Studies, Via Bonomea 265
dc.description.affiliationINFN Sezione di Trieste, Via Valerio 2
dc.description.affiliationICTP South American Institute for Fundamental Research Instituto de Física Teórica Universidade Estadual Paulista (UNESP), Rua Dr Bento Teobaldo Ferraz 271
dc.description.affiliationUnespICTP South American Institute for Fundamental Research Instituto de Física Teórica Universidade Estadual Paulista (UNESP), Rua Dr Bento Teobaldo Ferraz 271
dc.identifier.doi10.1093/mnras/stw3055
dc.rights.accessRightsAcesso aberto
dc.identifier.scopus2-s2.0-85014838597
dc.identifier.file2-s2.0-85014838597.pdf
dc.relation.ispartofsjr2,346
dc.relation.ispartofsjr2,346
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