A revision of the fundamental parameters of the open cluster Hogg 15 and the projected star WR 47
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/98760 |
Resumo: | We 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. |
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Piatti, Andres E.Bica, Eduardo Luiz DamianiSantos Junior, Joao Francisco Coelho dosClaria Olmedo, Juan Jose2014-07-26T02:09:14Z20020004-6361http://hdl.handle.net/10183/98760000317839We 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.application/pdfengAstronomy and astrophysics. Les Ulis. Vol. 387, no. 1 (May 2002), p. 108-116Fotometria astronômicaEspectros astronômicosAglomerados estelaresEspectros estelaresEstrelas wolf-rayetTechniques: photometricTechniques: spectroscopicGalaxy: open clusters and associations: generalGalaxy: open clusters and associations: individual: Hogg 15Stars: individual: WRA revision of the fundamental parameters of the open cluster Hogg 15 and the projected star WR 47Estrangeiroinfo: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:UFRGSORIGINAL000317839.pdf000317839.pdfTexto completo (inglês)application/pdf427290http://www.lume.ufrgs.br/bitstream/10183/98760/1/000317839.pdf3bc8298425ffcb15c8b2c9af5f471b29MD51TEXT000317839.pdf.txt000317839.pdf.txtExtracted Texttext/plain31174http://www.lume.ufrgs.br/bitstream/10183/98760/2/000317839.pdf.txtd4d97e1dde9116553913b3cfc68d4f08MD52THUMBNAIL000317839.pdf.jpg000317839.pdf.jpgGenerated Thumbnailimage/jpeg2020http://www.lume.ufrgs.br/bitstream/10183/98760/3/000317839.pdf.jpg0eb0db1ab0a6fded3667bb6d7e7715fdMD5310183/987602024-04-12 06:21:20.664821oai:www.lume.ufrgs.br:10183/98760Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-04-12T09:21:20Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
A revision of the fundamental parameters of the open cluster Hogg 15 and the projected star WR 47 |
title |
A revision of the fundamental parameters of the open cluster Hogg 15 and the projected star WR 47 |
spellingShingle |
A revision of the fundamental parameters of the open cluster Hogg 15 and the projected star WR 47 Piatti, Andres E. Fotometria astronômica Espectros astronômicos Aglomerados estelares Espectros estelares Estrelas wolf-rayet Techniques: photometric Techniques: spectroscopic Galaxy: open clusters and associations: general Galaxy: open clusters and associations: individual: Hogg 15 Stars: individual: WR |
title_short |
A revision of the fundamental parameters of the open cluster Hogg 15 and the projected star WR 47 |
title_full |
A revision of the fundamental parameters of the open cluster Hogg 15 and the projected star WR 47 |
title_fullStr |
A revision of the fundamental parameters of the open cluster Hogg 15 and the projected star WR 47 |
title_full_unstemmed |
A revision of the fundamental parameters of the open cluster Hogg 15 and the projected star WR 47 |
title_sort |
A revision of the fundamental parameters of the open cluster Hogg 15 and the projected star WR 47 |
author |
Piatti, Andres E. |
author_facet |
Piatti, Andres E. Bica, Eduardo Luiz Damiani Santos Junior, Joao Francisco Coelho dos Claria Olmedo, Juan Jose |
author_role |
author |
author2 |
Bica, Eduardo Luiz Damiani Santos Junior, Joao Francisco Coelho dos Claria Olmedo, Juan Jose |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Piatti, Andres E. Bica, Eduardo Luiz Damiani Santos Junior, Joao Francisco Coelho dos Claria Olmedo, Juan Jose |
dc.subject.por.fl_str_mv |
Fotometria astronômica Espectros astronômicos Aglomerados estelares Espectros estelares Estrelas wolf-rayet |
topic |
Fotometria astronômica Espectros astronômicos Aglomerados estelares Espectros estelares Estrelas wolf-rayet Techniques: photometric Techniques: spectroscopic Galaxy: open clusters and associations: general Galaxy: open clusters and associations: individual: Hogg 15 Stars: individual: WR |
dc.subject.eng.fl_str_mv |
Techniques: photometric Techniques: spectroscopic Galaxy: open clusters and associations: general Galaxy: open clusters and associations: individual: Hogg 15 Stars: individual: WR |
description |
We 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. |
publishDate |
2002 |
dc.date.issued.fl_str_mv |
2002 |
dc.date.accessioned.fl_str_mv |
2014-07-26T02:09:14Z |
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http://hdl.handle.net/10183/98760 |
dc.language.iso.fl_str_mv |
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language |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. Les Ulis. Vol. 387, no. 1 (May 2002), p. 108-116 |
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