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dc.contributor.authorOrtolani, Sergiopt_BR
dc.contributor.authorBica, Eduardo Luiz Damianipt_BR
dc.contributor.authorBarbuy, Beatrizpt_BR
dc.date.accessioned2014-04-03T01:51:28Zpt_BR
dc.date.issued2008pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/90276pt_BR
dc.description.abstractThe study of old open clusters outside the solar circle can bring constraints on formation scenarios of the outer disc. In particular, accretion of dwarf galaxies has been proposed as a likelymechanism in the area. We use BVI photometry for determining fundamental parameters of the faint open cluster ESO 92-SC05. Colour–magnitude diagrams are compared with Padova isochrones, in order to derive age, reddening and distance. We derive a reddening E(B − V) = 0.17, and an old age of ~ 6.0 Gyr. It is one of the rare open clusters known to be older than 5Gyr. A metallicity of Z ~ 0.004 or [M/H] ~ −0.7 is found. The rather low metallicity suggests that this cluster might be the result of an accretion episode of a dwarf galaxy.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the royal astronomical society. Oxford. Vol. 388, no. 2 (Aug. 2008), p. 723-728pt_BR
dc.rightsOpen Accessen
dc.subjectAglomerados abertos e associaçõespt_BR
dc.subjectHertzsprung–Russell (HR) diagramen
dc.subjectOpen clusters and associations: individual: ESO 92-SC05en
dc.subjectVia lácteapt_BR
dc.subjectMetalicidadept_BR
dc.subjectFotometriapt_BR
dc.subjectAglomerado aberto ESO 92-SC05pt_BR
dc.titleThe old metal-poor open cluster ESO 92-SC05 : accreted from a dwarf galaxy?pt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000679993pt_BR
dc.type.originEstrangeiropt_BR


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