Near infrared photometric and optical spectroscopic study of 22 low mass star clusters embedded in nubulae
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/98990 |
Resumo: | Aims. Among the star clusters in the Galaxy, those embedded in nebulae represent the youngest group, which has only recently been explored. The analysis of a sample of 22 candidate embedded stellar systems in reflection nebulae and/or HII environments is presented. Methods. We employed optical spectroscopic observations of stars in the directions of the clusters carried out at CASLEO (Argentina) together with near infrared photometry from the 2MASS catalogue. Our analysis is based on source surface density, colour−colour diagrams and on theoretical pre-main sequence isochrones. We take into account the field star contamination by carrying out a statistical subtraction. Results. The studied objects have the characteristics of low mass systems. We derive their fundamental parameters. Most of the cluster ages are younger than 2 Myr. The studied embedded stellar systems in reflection nebulae and/or HII region complexes do not have stars of spectral types earlier than B. The total stellar masses locked in the clusters are in the range 20−220 Mʘ. They are found to be gravitationally unstable and are expected to dissolve in a timescale of a few Myr. |
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Soares, Jules BatistaBica, Eduardo Luiz DamianiAhumada, Andrea VeronicaClaria Olmedo, Juan Jose2014-07-31T02:05:14Z20080004-6361http://hdl.handle.net/10183/98990000624998Aims. Among the star clusters in the Galaxy, those embedded in nebulae represent the youngest group, which has only recently been explored. The analysis of a sample of 22 candidate embedded stellar systems in reflection nebulae and/or HII environments is presented. Methods. We employed optical spectroscopic observations of stars in the directions of the clusters carried out at CASLEO (Argentina) together with near infrared photometry from the 2MASS catalogue. Our analysis is based on source surface density, colour−colour diagrams and on theoretical pre-main sequence isochrones. We take into account the field star contamination by carrying out a statistical subtraction. Results. The studied objects have the characteristics of low mass systems. We derive their fundamental parameters. Most of the cluster ages are younger than 2 Myr. The studied embedded stellar systems in reflection nebulae and/or HII region complexes do not have stars of spectral types earlier than B. The total stellar masses locked in the clusters are in the range 20−220 Mʘ. They are found to be gravitationally unstable and are expected to dissolve in a timescale of a few Myr.application/pdfengAstronomy and Astrophysics. Berlin. Vol. 478, no. 2 (Feb. 2008), p. 419-427GaláxiasAglomerados abertos e associaçõesAstrofísicaGalaxy: open clusters and associations: generalNear infrared photometric and optical spectroscopic study of 22 low mass star clusters embedded in nubulaeEstrangeiroinfo: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:UFRGSORIGINAL000624998.pdf000624998.pdfTexto completo (inglês)application/pdf622009http://www.lume.ufrgs.br/bitstream/10183/98990/1/000624998.pdffca90fc6fe05b9657cc1bd951ef40e5dMD51TEXT000624998.pdf.txt000624998.pdf.txtExtracted Texttext/plain30047http://www.lume.ufrgs.br/bitstream/10183/98990/2/000624998.pdf.txt14030d2a28d952ab7cf9cf9a953f056dMD52THUMBNAIL000624998.pdf.jpg000624998.pdf.jpgGenerated Thumbnailimage/jpeg2024http://www.lume.ufrgs.br/bitstream/10183/98990/3/000624998.pdf.jpgd2347ac135e8897b6ea261e7e288cc5aMD5310183/989902023-10-25 03:39:08.280975oai:www.lume.ufrgs.br:10183/98990Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-10-25T06:39:08Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Near infrared photometric and optical spectroscopic study of 22 low mass star clusters embedded in nubulae |
title |
Near infrared photometric and optical spectroscopic study of 22 low mass star clusters embedded in nubulae |
spellingShingle |
Near infrared photometric and optical spectroscopic study of 22 low mass star clusters embedded in nubulae Soares, Jules Batista Galáxias Aglomerados abertos e associações Astrofísica Galaxy: open clusters and associations: general |
title_short |
Near infrared photometric and optical spectroscopic study of 22 low mass star clusters embedded in nubulae |
title_full |
Near infrared photometric and optical spectroscopic study of 22 low mass star clusters embedded in nubulae |
title_fullStr |
Near infrared photometric and optical spectroscopic study of 22 low mass star clusters embedded in nubulae |
title_full_unstemmed |
Near infrared photometric and optical spectroscopic study of 22 low mass star clusters embedded in nubulae |
title_sort |
Near infrared photometric and optical spectroscopic study of 22 low mass star clusters embedded in nubulae |
author |
Soares, Jules Batista |
author_facet |
Soares, Jules Batista Bica, Eduardo Luiz Damiani Ahumada, Andrea Veronica Claria Olmedo, Juan Jose |
author_role |
author |
author2 |
Bica, Eduardo Luiz Damiani Ahumada, Andrea Veronica Claria Olmedo, Juan Jose |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Soares, Jules Batista Bica, Eduardo Luiz Damiani Ahumada, Andrea Veronica Claria Olmedo, Juan Jose |
dc.subject.por.fl_str_mv |
Galáxias Aglomerados abertos e associações Astrofísica |
topic |
Galáxias Aglomerados abertos e associações Astrofísica Galaxy: open clusters and associations: general |
dc.subject.eng.fl_str_mv |
Galaxy: open clusters and associations: general |
description |
Aims. Among the star clusters in the Galaxy, those embedded in nebulae represent the youngest group, which has only recently been explored. The analysis of a sample of 22 candidate embedded stellar systems in reflection nebulae and/or HII environments is presented. Methods. We employed optical spectroscopic observations of stars in the directions of the clusters carried out at CASLEO (Argentina) together with near infrared photometry from the 2MASS catalogue. Our analysis is based on source surface density, colour−colour diagrams and on theoretical pre-main sequence isochrones. We take into account the field star contamination by carrying out a statistical subtraction. Results. The studied objects have the characteristics of low mass systems. We derive their fundamental parameters. Most of the cluster ages are younger than 2 Myr. The studied embedded stellar systems in reflection nebulae and/or HII region complexes do not have stars of spectral types earlier than B. The total stellar masses locked in the clusters are in the range 20−220 Mʘ. They are found to be gravitationally unstable and are expected to dissolve in a timescale of a few Myr. |
publishDate |
2008 |
dc.date.issued.fl_str_mv |
2008 |
dc.date.accessioned.fl_str_mv |
2014-07-31T02:05:14Z |
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0004-6361 |
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000624998 |
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http://hdl.handle.net/10183/98990 |
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eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and Astrophysics. Berlin. Vol. 478, no. 2 (Feb. 2008), p. 419-427 |
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openAccess |
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