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Hp 1 : a blue horizontal branch globular cluster in the bulge

dc.contributor.authorOrtolani, Sergiopt_BR
dc.contributor.authorBica, Eduardo Luiz Damianipt_BR
dc.contributor.authorBarbuy, Beatrizpt_BR
dc.date.accessioned2014-03-21T01:48:50Zpt_BR
dc.date.issued1997pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/88732pt_BR
dc.description.abstractWe present V, I colour-magnitude diagrams of the globular cluster HP 1 obtained at the European Southern Observatory New Technology Telescope under exceptional seeing conditions. The cluster shows blue horizontal branch (HB) and red giant branch morphologies very similar to clusters of intermediate metallicity such as NGC 6752; we therefore estimate [Fe/H] ~~ - 1.5 for HP 1. The blue HB morphology is extended, which is not unusual for a post-core-collapse cluster. We derive a reddening of E (B - V) = 1.19 and a distance d̛ =6.85 kpc. HP 1 might be a halo cluster crossing the bulge or belong to the low-metallicity tail of the bulge.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society. London. Vol. 284, no. 3 (Jan. 1997), p. 692-698pt_BR
dc.rightsOpen Accessen
dc.subjectGlobular clusters: individual: HP 1en
dc.subjectAstrofisica extragalaticapt_BR
dc.subjectEstruturas galaticas : Aglomerados globulares : Populacoes estelares : Galaxiapt_BR
dc.subjectGalaxy: haloen
dc.subjectGalaxy: structureen
dc.subjectFotometriapt_BR
dc.titleHp 1 : a blue horizontal branch globular cluster in the bulgept_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000188531pt_BR
dc.type.originEstrangeiropt_BR


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