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High quality seeing V, I and Gunn z imaging of Terzan 4 : a blue horizontal branch bulge globular cluster

dc.contributor.authorOrtolani, Sergiopt_BR
dc.contributor.authorBarbuy, Beatrizpt_BR
dc.contributor.authorBica, Eduardo Luiz Damianipt_BR
dc.date.accessioned2014-07-23T02:04:37Zpt_BR
dc.date.issued1997pt_BR
dc.identifier.issn0004-6361pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/98384pt_BR
dc.description.abstractWe study the globular cluster Terzan 4 projected close to the Galactic center, by means of V, I and Gunn z Colour-Magnitude Diagrams. The images were obtained under exceptional seeing conditions (0.35" - 0.55") at the ESO New Technology Telescope equipped with SUSI. We derive a reddening of E(B-V) = 2.35 amd a distance from the Sun dΘ = 8.3 kpc for Terzan 4. From the similarity of the VI Colour-Magnitude Diagrams of Terzan 4 and M30, in particular the presence of a blue horizontal branch, it could be as metal-poor as [Fe/H] ≈ -2.0. It is therefore another blue horizontal branch globular cluster located close to the Galactic center.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofAstronomy and Astrophysics. Berlin. Vol. 319, no. 3 (Mar. 1997), p. 850-854pt_BR
dc.rightsOpen Accessen
dc.subjectAstrofisica extragalaticapt_BR
dc.subjectGlobular clusters: individual: Terzan 4;M 30; generalen
dc.subjectHR diagramen
dc.subjectAglomerados globularespt_BR
dc.subjectGalaxy: centeren
dc.titleHigh quality seeing V, I and Gunn z imaging of Terzan 4 : a blue horizontal branch bulge globular clusterpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000157707pt_BR
dc.type.originEstrangeiropt_BR


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