A unified solution to the small scale problems of the Lambda CDM model II: introducing parent-satellite interaction

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dc.contributor.authorDel Popolo, A.
dc.contributor.authorLe Delliou, M. [UNESP]
dc.contributor.institutionUniv Catania
dc.contributor.institutionIst Nazl Fis Nucl
dc.contributor.institutionUniversidade Federal dp Rio Grande do Norte (UFRN)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2015-11-03T15:28:51Z
dc.date.available2015-11-03T15:28:51Z
dc.date.issued2014-12-01
dc.description.abstractWe continue the study of the impact of baryon physics on the small scale problems of the Lambda CDM model, based on a semi-analytical model (Del Popolo, 2009). With such model, we show how the cusp/core, missing satellite (MSP), Too Big to Fail (TBTF) problems and the angular momentum catastrophe can be reconciled with observations, adding parent-satellite interaction. Such interaction between dark matter (DM) and baryons through dynamical friction (DF) can sufficiently flatten the inner cusp of the density profiles to solve the cusp/core problem. Combining, in our model, a Zolotov et al. (2012)-like correction, similarly to Brooks et al. (2013), and effects of UV heating and tidal stripping, the number of massive, luminous satellites, as seen in the Via Lactea 2 (VL2) subhaloes, is in agreement with the numbers observed in the MW, thus resolving the MSP and TBTF problems. The model also produces a distribution of the angular spin parameter and angular momentum in agreement with observations of the dwarfs studied by van den Bosch, Burkert, &Swaters (2001).en
dc.description.affiliationUniv Catania, Dipartimento Fis &Astron, I-95125 Catania, Italy
dc.description.affiliationIst Nazl Fis Nucl, Sez Catania, I-95123 Catania, Italy
dc.description.affiliationUniv Fed Rio Grande do Norte, Int Inst Phys, BR-59012970 Natal, RN, Brazil
dc.description.affiliationUniv Estadual Paulista, IFT, BR-01140070 Sao Paulo, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Instituto de Fisica Teorica (IFT), BR-01140070 Sao Paulo, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2011/24089-5
dc.description.sponsorshipIdFAPESP: PNPD/CAPES20132029
dc.format.extent1-26
dc.identifierhttp://iopscience.iop.org/article/10.1088/1475-7516/2014/12/051/meta;jsessionid=6541312D8F005C000B334B7E48B1556F.c1.iopscience.cld.iop.org
dc.identifier.citationJournal Of Cosmology And Astroparticle Physics. Bristol: Iop Publishing Ltd, n. 12, p. 1-26, 2014.
dc.identifier.doi10.1088/1475-7516/2014/12/051
dc.identifier.issn1475-7516
dc.identifier.urihttp://hdl.handle.net/11449/130046
dc.identifier.wosWOS:000350115800020
dc.language.isoeng
dc.publisherIop Publishing Ltd
dc.relation.ispartofJournal Of Cosmology And Astroparticle Physics
dc.relation.ispartofjcr5.126
dc.relation.ispartofsjr1,089
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectDark matter theoryen
dc.subjectGalaxy evolutionen
dc.subjectGalaxy formationen
dc.titleA unified solution to the small scale problems of the Lambda CDM model II: introducing parent-satellite interactionen
dc.typeArtigo
dcterms.licensehttp://iopscience.iop.org/page/copyright
dcterms.rightsHolderIop Publishing Ltd
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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