Old open clusters in the inner Galaxy : FSR 1744, FSR 89 and FSR 31
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/98992 |
Resumo: | Context. We examine the dynamical survival of intermediate-age/old open clusters in the inner Galaxy. Aims. We aim to establish the nature and derive fundamental and structural parameters of the recently catalogued objects FSR 1744, FSR 89 and FSR 31 to constrain the Galactic tidal disruption efficiency, improve statistics of the open cluster parameter space, and better define their age-distribution function inside the Solar circle. The current status of the issue dealing with the small number of detected open clusters in the inner Galaxy is discussed. Methods. Properties of the objects are investigated with 2MASS colour–magnitude diagrams and stellar radial density profiles built with field star decontaminated photometry. Diagnostic diagrams of structural parameters are used to separate dynamical from highbackground effects affecting such centrally projected open clusters. Results. FSR 1744, FSR 89 and FSR 31 are Gyr-class open clusters located at Galactocentric distances 4.0–5.6 kpc. Compared to nearby open clusters, they have small core and limiting radii. Conclusions. With respect to the small number of open clusters observed in the inner Galaxy, the emerging scenario in the nearinfrared favours disruption driven by dynamical evolution rather than observational limitations associated with absorption and/or high background levels. Internally, the main processes associated with the dynamical evolution are mass loss by stellar evolution, mass segregation and evaporation. Externally they are tidal stress from the disk and bulge, and interactions with giant molecular clouds. FSR 1744, FSR 89 and FSR 31 have structural parameters consistent with their Galactocentric distances, in the sense that tidally induced effects may have accelerated the dynamical evolution. |
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Bonatto, Charles JoseBica, Eduardo Luiz Damiani2014-07-31T02:05:15Z20070004-6361http://hdl.handle.net/10183/98992000629546Context. We examine the dynamical survival of intermediate-age/old open clusters in the inner Galaxy. Aims. We aim to establish the nature and derive fundamental and structural parameters of the recently catalogued objects FSR 1744, FSR 89 and FSR 31 to constrain the Galactic tidal disruption efficiency, improve statistics of the open cluster parameter space, and better define their age-distribution function inside the Solar circle. The current status of the issue dealing with the small number of detected open clusters in the inner Galaxy is discussed. Methods. Properties of the objects are investigated with 2MASS colour–magnitude diagrams and stellar radial density profiles built with field star decontaminated photometry. Diagnostic diagrams of structural parameters are used to separate dynamical from highbackground effects affecting such centrally projected open clusters. Results. FSR 1744, FSR 89 and FSR 31 are Gyr-class open clusters located at Galactocentric distances 4.0–5.6 kpc. Compared to nearby open clusters, they have small core and limiting radii. Conclusions. With respect to the small number of open clusters observed in the inner Galaxy, the emerging scenario in the nearinfrared favours disruption driven by dynamical evolution rather than observational limitations associated with absorption and/or high background levels. Internally, the main processes associated with the dynamical evolution are mass loss by stellar evolution, mass segregation and evaporation. Externally they are tidal stress from the disk and bulge, and interactions with giant molecular clouds. FSR 1744, FSR 89 and FSR 31 have structural parameters consistent with their Galactocentric distances, in the sense that tidally induced effects may have accelerated the dynamical evolution.application/pdfengAstronomy and astrophysics. Les Ulis. Vol. 473, no. 2 (Oct. 2007), p. 445-455Aglomerados estelaresAglomerados abertos e associaçõesGaláxiasGalaxy: open clusters and associations: individual: FSR 1744Open clusters and associations: individual: FSR 89Open clusters and associations: individual: FSR 31Galaxy: structureOld open clusters in the inner Galaxy : FSR 1744, FSR 89 and FSR 31Estrangeiroinfo: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:UFRGSORIGINAL000629546.pdf000629546.pdfTexto completo (inglês)application/pdf911566http://www.lume.ufrgs.br/bitstream/10183/98992/1/000629546.pdff26e836e68fb1849197d2a80090a21e6MD51TEXT000629546.pdf.txt000629546.pdf.txtExtracted Texttext/plain59125http://www.lume.ufrgs.br/bitstream/10183/98992/2/000629546.pdf.txt4241e360cc44065bc679eab1786e70b7MD52THUMBNAIL000629546.pdf.jpg000629546.pdf.jpgGenerated Thumbnailimage/jpeg2069http://www.lume.ufrgs.br/bitstream/10183/98992/3/000629546.pdf.jpg61c4d882fc73dc20886e2eaf60749b6fMD5310183/989922023-07-15 03:26:51.368914oai:www.lume.ufrgs.br:10183/98992Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-15T06:26:51Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Old open clusters in the inner Galaxy : FSR 1744, FSR 89 and FSR 31 |
title |
Old open clusters in the inner Galaxy : FSR 1744, FSR 89 and FSR 31 |
spellingShingle |
Old open clusters in the inner Galaxy : FSR 1744, FSR 89 and FSR 31 Bonatto, Charles Jose Aglomerados estelares Aglomerados abertos e associações Galáxias Galaxy: open clusters and associations: individual: FSR 1744 Open clusters and associations: individual: FSR 89 Open clusters and associations: individual: FSR 31 Galaxy: structure |
title_short |
Old open clusters in the inner Galaxy : FSR 1744, FSR 89 and FSR 31 |
title_full |
Old open clusters in the inner Galaxy : FSR 1744, FSR 89 and FSR 31 |
title_fullStr |
Old open clusters in the inner Galaxy : FSR 1744, FSR 89 and FSR 31 |
title_full_unstemmed |
Old open clusters in the inner Galaxy : FSR 1744, FSR 89 and FSR 31 |
title_sort |
Old open clusters in the inner Galaxy : FSR 1744, FSR 89 and FSR 31 |
author |
Bonatto, Charles Jose |
author_facet |
Bonatto, Charles Jose Bica, Eduardo Luiz Damiani |
author_role |
author |
author2 |
Bica, Eduardo Luiz Damiani |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Bonatto, Charles Jose Bica, Eduardo Luiz Damiani |
dc.subject.por.fl_str_mv |
Aglomerados estelares Aglomerados abertos e associações Galáxias |
topic |
Aglomerados estelares Aglomerados abertos e associações Galáxias Galaxy: open clusters and associations: individual: FSR 1744 Open clusters and associations: individual: FSR 89 Open clusters and associations: individual: FSR 31 Galaxy: structure |
dc.subject.eng.fl_str_mv |
Galaxy: open clusters and associations: individual: FSR 1744 Open clusters and associations: individual: FSR 89 Open clusters and associations: individual: FSR 31 Galaxy: structure |
description |
Context. We examine the dynamical survival of intermediate-age/old open clusters in the inner Galaxy. Aims. We aim to establish the nature and derive fundamental and structural parameters of the recently catalogued objects FSR 1744, FSR 89 and FSR 31 to constrain the Galactic tidal disruption efficiency, improve statistics of the open cluster parameter space, and better define their age-distribution function inside the Solar circle. The current status of the issue dealing with the small number of detected open clusters in the inner Galaxy is discussed. Methods. Properties of the objects are investigated with 2MASS colour–magnitude diagrams and stellar radial density profiles built with field star decontaminated photometry. Diagnostic diagrams of structural parameters are used to separate dynamical from highbackground effects affecting such centrally projected open clusters. Results. FSR 1744, FSR 89 and FSR 31 are Gyr-class open clusters located at Galactocentric distances 4.0–5.6 kpc. Compared to nearby open clusters, they have small core and limiting radii. Conclusions. With respect to the small number of open clusters observed in the inner Galaxy, the emerging scenario in the nearinfrared favours disruption driven by dynamical evolution rather than observational limitations associated with absorption and/or high background levels. Internally, the main processes associated with the dynamical evolution are mass loss by stellar evolution, mass segregation and evaporation. Externally they are tidal stress from the disk and bulge, and interactions with giant molecular clouds. FSR 1744, FSR 89 and FSR 31 have structural parameters consistent with their Galactocentric distances, in the sense that tidally induced effects may have accelerated the dynamical evolution. |
publishDate |
2007 |
dc.date.issued.fl_str_mv |
2007 |
dc.date.accessioned.fl_str_mv |
2014-07-31T02:05:15Z |
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Estrangeiro info:eu-repo/semantics/article |
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0004-6361 |
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000629546 |
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http://hdl.handle.net/10183/98992 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. Les Ulis. Vol. 473, no. 2 (Oct. 2007), p. 445-455 |
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openAccess |
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