NTT infrared imaging of star cluster candidates towards the central parts of the Galaxy
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/108026 |
Resumo: | We address the issue whether the central parts of the Galaxy harbour young clusters other than Arches, Quintuplet and the Nuclear Young Cluster. A large sample of centrally projected cluster candidates has been recently identified from the 2MASS J, H and Ks Atlas. We provide a catalogue of higher angular resolution and deeper images for 57 2MASS cluster candidates, obtained with the near-IR camera SOFI at the ESO NTT telescope. We classify 10 objects as star clusters, some of them deeply embedded in gas and/or dust clouds. Three other objects are probably star clusters, although the presence of dust in the field does not exclude the possibility of their being field stars seen through low-absorption regions. Eleven objects are concentrations of stars in areas of little or no gas, and are classified as dissolving cluster candidates. Finally, 31 objects turned out to be the blend of a few bright stars, not resolved as such in the low resolution 2MASS images. By combining the above results with other known objects we provide an updated sample of 42 embedded clusters and candidates projected within 7◦. As a first step we study Object 11 of Dutra & Bica (2000) projected at ≈1◦ from the nucleus. We present H and Ks photometry and study the colour-magnitude diagram and luminosity function. Object 11 appears to be a less massive cluster than Arches or Quintuplet, and it is located at a distance from the Sun d ≈ 8 kpc, with a visual absorption AV ≈ 15. |
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Dutra, Carlos MaximilianoOrtolani, SergioBica, Eduardo Luiz DamianiBarbuy, BeatrizZoccali, ManuelaMomany, Yazan2014-12-11T02:15:41Z20030004-6361http://hdl.handle.net/10183/108026000383570We address the issue whether the central parts of the Galaxy harbour young clusters other than Arches, Quintuplet and the Nuclear Young Cluster. A large sample of centrally projected cluster candidates has been recently identified from the 2MASS J, H and Ks Atlas. We provide a catalogue of higher angular resolution and deeper images for 57 2MASS cluster candidates, obtained with the near-IR camera SOFI at the ESO NTT telescope. We classify 10 objects as star clusters, some of them deeply embedded in gas and/or dust clouds. Three other objects are probably star clusters, although the presence of dust in the field does not exclude the possibility of their being field stars seen through low-absorption regions. Eleven objects are concentrations of stars in areas of little or no gas, and are classified as dissolving cluster candidates. Finally, 31 objects turned out to be the blend of a few bright stars, not resolved as such in the low resolution 2MASS images. By combining the above results with other known objects we provide an updated sample of 42 embedded clusters and candidates projected within 7◦. As a first step we study Object 11 of Dutra & Bica (2000) projected at ≈1◦ from the nucleus. We present H and Ks photometry and study the colour-magnitude diagram and luminosity function. Object 11 appears to be a less massive cluster than Arches or Quintuplet, and it is located at a distance from the Sun d ≈ 8 kpc, with a visual absorption AV ≈ 15.application/pdfengAstronomy and astrophysics. Berlin. Vol. 408, no. 1 (Sept. 2003), p. 127-134Poeira cosmicaGalaxiaMateria interestelarFotometria estelarGalaxy: open clusters and associationsISM: dust, extinctionNTT infrared imaging of star cluster candidates towards the central parts of the GalaxyEstrangeiroinfo: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:UFRGSORIGINAL000383570.pdf000383570.pdfTexto completo (inglês)application/pdf832767http://www.lume.ufrgs.br/bitstream/10183/108026/1/000383570.pdf60bf07027fc903efcb369014c3919ba0MD51TEXT000383570.pdf.txt000383570.pdf.txtExtracted Texttext/plain30415http://www.lume.ufrgs.br/bitstream/10183/108026/2/000383570.pdf.txt62554d3dedcebc34102ad7f36d6991eeMD52THUMBNAIL000383570.pdf.jpg000383570.pdf.jpgGenerated Thumbnailimage/jpeg1917http://www.lume.ufrgs.br/bitstream/10183/108026/3/000383570.pdf.jpg54e0026cb30b54360d987a2e38c80c66MD5310183/1080262024-04-12 06:19:55.182208oai:www.lume.ufrgs.br:10183/108026Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-04-12T09:19:55Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
NTT infrared imaging of star cluster candidates towards the central parts of the Galaxy |
title |
NTT infrared imaging of star cluster candidates towards the central parts of the Galaxy |
spellingShingle |
NTT infrared imaging of star cluster candidates towards the central parts of the Galaxy Dutra, Carlos Maximiliano Poeira cosmica Galaxia Materia interestelar Fotometria estelar Galaxy: open clusters and associations ISM: dust, extinction |
title_short |
NTT infrared imaging of star cluster candidates towards the central parts of the Galaxy |
title_full |
NTT infrared imaging of star cluster candidates towards the central parts of the Galaxy |
title_fullStr |
NTT infrared imaging of star cluster candidates towards the central parts of the Galaxy |
title_full_unstemmed |
NTT infrared imaging of star cluster candidates towards the central parts of the Galaxy |
title_sort |
NTT infrared imaging of star cluster candidates towards the central parts of the Galaxy |
author |
Dutra, Carlos Maximiliano |
author_facet |
Dutra, Carlos Maximiliano Ortolani, Sergio Bica, Eduardo Luiz Damiani Barbuy, Beatriz Zoccali, Manuela Momany, Yazan |
author_role |
author |
author2 |
Ortolani, Sergio Bica, Eduardo Luiz Damiani Barbuy, Beatriz Zoccali, Manuela Momany, Yazan |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Dutra, Carlos Maximiliano Ortolani, Sergio Bica, Eduardo Luiz Damiani Barbuy, Beatriz Zoccali, Manuela Momany, Yazan |
dc.subject.por.fl_str_mv |
Poeira cosmica Galaxia Materia interestelar Fotometria estelar |
topic |
Poeira cosmica Galaxia Materia interestelar Fotometria estelar Galaxy: open clusters and associations ISM: dust, extinction |
dc.subject.eng.fl_str_mv |
Galaxy: open clusters and associations ISM: dust, extinction |
description |
We address the issue whether the central parts of the Galaxy harbour young clusters other than Arches, Quintuplet and the Nuclear Young Cluster. A large sample of centrally projected cluster candidates has been recently identified from the 2MASS J, H and Ks Atlas. We provide a catalogue of higher angular resolution and deeper images for 57 2MASS cluster candidates, obtained with the near-IR camera SOFI at the ESO NTT telescope. We classify 10 objects as star clusters, some of them deeply embedded in gas and/or dust clouds. Three other objects are probably star clusters, although the presence of dust in the field does not exclude the possibility of their being field stars seen through low-absorption regions. Eleven objects are concentrations of stars in areas of little or no gas, and are classified as dissolving cluster candidates. Finally, 31 objects turned out to be the blend of a few bright stars, not resolved as such in the low resolution 2MASS images. By combining the above results with other known objects we provide an updated sample of 42 embedded clusters and candidates projected within 7◦. As a first step we study Object 11 of Dutra & Bica (2000) projected at ≈1◦ from the nucleus. We present H and Ks photometry and study the colour-magnitude diagram and luminosity function. Object 11 appears to be a less massive cluster than Arches or Quintuplet, and it is located at a distance from the Sun d ≈ 8 kpc, with a visual absorption AV ≈ 15. |
publishDate |
2003 |
dc.date.issued.fl_str_mv |
2003 |
dc.date.accessioned.fl_str_mv |
2014-12-11T02:15:41Z |
dc.type.driver.fl_str_mv |
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format |
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http://hdl.handle.net/10183/108026 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. Berlin. Vol. 408, no. 1 (Sept. 2003), p. 127-134 |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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