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dc.contributor.authorPiatti, Andres E.pt_BR
dc.contributor.authorBica, Eduardo Luiz Damianipt_BR
dc.contributor.authorClaria Olmedo, Juan Josept_BR
dc.date.accessioned2014-07-24T02:04:21Zpt_BR
dc.date.issued2000pt_BR
dc.identifier.issn0004-6361pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/98509pt_BR
dc.description.abstractWe present CCD BV I observations obtained for stars in the fields of the unstudied or poorly studied open clusters Ruprecht 119, NGC6318, and BH245 projected close to the direction towards the Galactic centre.We measured V magnitude and B−V and V −I colours for about 600 stars reaching down to V ~19 mag. From the analysis of the colour magnitude diagrams, we confirmed the physical reality of the clusters and derived their reddening, distance and age for the first time. In addition, we obtained flux-calibrated integrated spectra in the range 3500-9200 Å for the cluster sample. Using the equivalent widths of the Balmer lines and comparing the cluster spectra with template spectra we derive both foreground reddening and age. The photometric and spectroscopic results reveal that the three studied objects are very young open clusters with ages ranging between 10 and 15 Myr, which have already undergone the HII region evolutionary phase and are dominated by the upper MS stars. The clusters, located between 1.1 kpc and 3.3 kpc from the Sun, are affected by different amounts of interstellar visual absorption (2.4 ≤ Av ≤ 7.0). In particular, BH245 turned out to be a highly reddened open cluster located at a distance of scarcely 1.1 kpc.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofAstronomy and astrophysics. New York. Vol. 362, no. 3 (Oct. 2000), p. 959-967pt_BR
dc.rightsOpen Accessen
dc.subjectCorpt_BR
dc.subjectTechniques: photometricen
dc.subjectTechniques: spectroscopicen
dc.subjectFotometria astronômicapt_BR
dc.subjectGalaxy: open clusters and associations: generalen
dc.subjectAstronomia infravermelhapt_BR
dc.subjectFotometria estelarpt_BR
dc.subjectGalaxy: open clusters and associations: individual: BH 245, NGC 6318, Ruprecht 119en
dc.subjectEspectrofotometriapt_BR
dc.subjectEspectros estelarespt_BR
dc.subjectIdadept_BR
dc.titleBVI photometry and integrated spectroscopy of the very young open clusters Ruprecht 119, NGC 6318 and BH 245pt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000279412pt_BR
dc.type.originEstrangeiropt_BR


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