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dc.contributor.authorPiatti, Andres E.pt_BR
dc.contributor.authorBica, Eduardo Luiz Damianipt_BR
dc.contributor.authorSantos Junior, Joao Francisco Coelho dospt_BR
dc.contributor.authorClaria Olmedo, Juan Josept_BR
dc.date.accessioned2014-07-26T02:09:14Zpt_BR
dc.date.issued2002pt_BR
dc.identifier.issn0004-6361pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/98760pt_BR
dc.description.abstractWe revise the fundamental parameters of the faint open cluster Hogg 15, for which two recent colour-magnitude diagram (CMD) studies have obtained significantly different ages. In the present study, we combine a series of methods trying to constrain age, together with other fundamental parameters. We employ spatial extractions to construct the CMDs, and the cluster integrated spectrum to compare it with those of templates of known age. We derive fundamental parameters, in particular, distance, of the closely projected Wolf-Rayet star HDE311884 (WR47) - often proposed to be physically related to Hogg 15. Based on the WR47 spectrum and available photometry, we conclude that the short distance implied by the Hipparcos parallax (216 pc) is affected by binary motion. From the WR47 spectrum we estimate a reddening E(B − V ) and a distance of 1.10 ± 0.05 and 5.2 ± 0.9 kpc, respectively. For Hogg 15 we derive an age of 20 ± 10 Myr, a reddening of 1.10 ± 0.05, and a distance of 3.1 ± 0.5 kpc. We conclude that Hogg 15 is not related to WR47 from the point of view of origin, since the cluster and the star do not belong to the same formation event.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofAstronomy and astrophysics. Les Ulis. Vol. 387, no. 1 (May 2002), p. 108-116pt_BR
dc.rightsOpen Accessen
dc.subjectTechniques: photometricen
dc.subjectFotometria astronômicapt_BR
dc.subjectEspectros astronômicospt_BR
dc.subjectTechniques: spectroscopicen
dc.subjectAglomerados estelarespt_BR
dc.subjectGalaxy: open clusters and associations: generalen
dc.subjectEspectros estelarespt_BR
dc.subjectGalaxy: open clusters and associations: individual: Hogg 15en
dc.subjectStars: individual: WRen
dc.subjectEstrelas wolf-rayetpt_BR
dc.titleA revision of the fundamental parameters of the open cluster Hogg 15 and the projected star WR 47pt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000317839pt_BR
dc.type.originEstrangeiropt_BR


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