BVI photometry and integrated spectroscopy of the very young open clusters Ruprecht 119, NGC 6318 and BH 245
Autor(a) principal: | |
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Data de Publicação: | 2000 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/98509 |
Resumo: | We 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. |
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Piatti, Andres E.Bica, Eduardo Luiz DamianiClaria Olmedo, Juan Jose2014-07-24T02:04:21Z20000004-6361http://hdl.handle.net/10183/98509000279412We 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.application/pdfengAstronomy and astrophysics. New York. Vol. 362, no. 3 (Oct. 2000), p. 959-967CorFotometria astronômicaAstronomia infravermelhaFotometria estelarEspectrofotometriaEspectros estelaresIdadeTechniques: photometricTechniques: spectroscopicGalaxy: open clusters and associations: generalGalaxy: open clusters and associations: individual: BH 245, NGC 6318, Ruprecht 119BVI photometry and integrated spectroscopy of the very young open clusters Ruprecht 119, NGC 6318 and BH 245Estrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000279412.pdf000279412.pdfTexto completo (inglês)application/pdf587201http://www.lume.ufrgs.br/bitstream/10183/98509/1/000279412.pdf7b78af4efd2a0392b7af93160023f172MD51TEXT000279412.pdf.txt000279412.pdf.txtExtracted Texttext/plain38039http://www.lume.ufrgs.br/bitstream/10183/98509/2/000279412.pdf.txt27092dd22cc7b016b37267460e0addbfMD52THUMBNAIL000279412.pdf.jpg000279412.pdf.jpgGenerated Thumbnailimage/jpeg2054http://www.lume.ufrgs.br/bitstream/10183/98509/3/000279412.pdf.jpg2a11d589ef78ea6eda3847165bdddf5fMD5310183/985092024-04-13 06:44:27.648269oai:www.lume.ufrgs.br:10183/98509Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-04-13T09:44:27Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
BVI photometry and integrated spectroscopy of the very young open clusters Ruprecht 119, NGC 6318 and BH 245 |
title |
BVI photometry and integrated spectroscopy of the very young open clusters Ruprecht 119, NGC 6318 and BH 245 |
spellingShingle |
BVI photometry and integrated spectroscopy of the very young open clusters Ruprecht 119, NGC 6318 and BH 245 Piatti, Andres E. Cor Fotometria astronômica Astronomia infravermelha Fotometria estelar Espectrofotometria Espectros estelares Idade Techniques: photometric Techniques: spectroscopic Galaxy: open clusters and associations: general Galaxy: open clusters and associations: individual: BH 245, NGC 6318, Ruprecht 119 |
title_short |
BVI photometry and integrated spectroscopy of the very young open clusters Ruprecht 119, NGC 6318 and BH 245 |
title_full |
BVI photometry and integrated spectroscopy of the very young open clusters Ruprecht 119, NGC 6318 and BH 245 |
title_fullStr |
BVI photometry and integrated spectroscopy of the very young open clusters Ruprecht 119, NGC 6318 and BH 245 |
title_full_unstemmed |
BVI photometry and integrated spectroscopy of the very young open clusters Ruprecht 119, NGC 6318 and BH 245 |
title_sort |
BVI photometry and integrated spectroscopy of the very young open clusters Ruprecht 119, NGC 6318 and BH 245 |
author |
Piatti, Andres E. |
author_facet |
Piatti, Andres E. Bica, Eduardo Luiz Damiani Claria Olmedo, Juan Jose |
author_role |
author |
author2 |
Bica, Eduardo Luiz Damiani Claria Olmedo, Juan Jose |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Piatti, Andres E. Bica, Eduardo Luiz Damiani Claria Olmedo, Juan Jose |
dc.subject.por.fl_str_mv |
Cor Fotometria astronômica Astronomia infravermelha Fotometria estelar Espectrofotometria Espectros estelares Idade |
topic |
Cor Fotometria astronômica Astronomia infravermelha Fotometria estelar Espectrofotometria Espectros estelares Idade Techniques: photometric Techniques: spectroscopic Galaxy: open clusters and associations: general Galaxy: open clusters and associations: individual: BH 245, NGC 6318, Ruprecht 119 |
dc.subject.eng.fl_str_mv |
Techniques: photometric Techniques: spectroscopic Galaxy: open clusters and associations: general Galaxy: open clusters and associations: individual: BH 245, NGC 6318, Ruprecht 119 |
description |
We 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. |
publishDate |
2000 |
dc.date.issued.fl_str_mv |
2000 |
dc.date.accessioned.fl_str_mv |
2014-07-24T02:04:21Z |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. New York. Vol. 362, no. 3 (Oct. 2000), p. 959-967 |
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