Probing embedded star clusters in the HII complex NGC6357 with VVV
Autor(a) principal: | |
---|---|
Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/126969 |
Resumo: | Context. NGC6357 is an active star-forming region located in the Sagittarius arm that displays several star clusters, which makes it a very interesting target to investigate star formation and early cluster evolution. Aims. We explore NGC6357 with the VISTA Variables in the Vía Láctea (VVV) photometry of seven embedded clusters (ECs), and one open cluster projected in the outskirts of the complex. Methods. Photometric and structural properties (age, reddening, distance, core, and total radii) of the star clusters were derived. VVV saturated stars were replaced by their 2MASS counterparts. Field-decontaminated VVV photometry was used to analyse colour– magnitude diagrams (CMDs) and stellar radial density profiles and determine astrophysical parameters. Results. We report the discovery of four ECs and one intermediate-age cluster in the complex area. We derive a revised distance estimate for NGC6357 of 1.78 ± 0.1 kpc based on the cluster CMD morphologies. Of the ECs, one contains the binary star WR93, while the remaining ones are dominated by pre-main sequence stars, young stellar objects, and/or and have a developed main sequence. These features reflect a significant age spread among the clusters. Evidence is found that the relatively populous cluster Pismis 24 hosts two subclusters. |
id |
UFRGS-2_9e93ff189e934563780628785ce48120 |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/126969 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Lima, Eliade FerreiraBica, Eduardo Luiz DamianiBonatto, Charles JoseSaito, Roberto K.2015-09-18T01:58:24Z20140004-6361http://hdl.handle.net/10183/126969000972463Context. NGC6357 is an active star-forming region located in the Sagittarius arm that displays several star clusters, which makes it a very interesting target to investigate star formation and early cluster evolution. Aims. We explore NGC6357 with the VISTA Variables in the Vía Láctea (VVV) photometry of seven embedded clusters (ECs), and one open cluster projected in the outskirts of the complex. Methods. Photometric and structural properties (age, reddening, distance, core, and total radii) of the star clusters were derived. VVV saturated stars were replaced by their 2MASS counterparts. Field-decontaminated VVV photometry was used to analyse colour– magnitude diagrams (CMDs) and stellar radial density profiles and determine astrophysical parameters. Results. We report the discovery of four ECs and one intermediate-age cluster in the complex area. We derive a revised distance estimate for NGC6357 of 1.78 ± 0.1 kpc based on the cluster CMD morphologies. Of the ECs, one contains the binary star WR93, while the remaining ones are dominated by pre-main sequence stars, young stellar objects, and/or and have a developed main sequence. These features reflect a significant age spread among the clusters. Evidence is found that the relatively populous cluster Pismis 24 hosts two subclusters.application/pdfengAstronomy and astrophysics. Les Ulis. Vol. 568 (Aug. 2014), A16, 11 p.Aglomerados estelaresFormacao de estrelasEstrelas binariasRegiões HIIFotometria estelarOpen clusters and associations: generalOpen clusters and associations: individual: NGC6357Instrumentation: adaptive opticsProbing embedded star clusters in the HII complex NGC6357 with VVVEstrangeiroinfo: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:UFRGSORIGINAL000972463.pdf000972463.pdfTexto completo (inglês)application/pdf2380448http://www.lume.ufrgs.br/bitstream/10183/126969/1/000972463.pdf0d2091f08f8a4c76efd4e1af6ca61fbcMD51TEXT000972463.pdf.txt000972463.pdf.txtExtracted Texttext/plain45737http://www.lume.ufrgs.br/bitstream/10183/126969/2/000972463.pdf.txt4c255de985e77dfa0975bb04f9361567MD52THUMBNAIL000972463.pdf.jpg000972463.pdf.jpgGenerated Thumbnailimage/jpeg1973http://www.lume.ufrgs.br/bitstream/10183/126969/3/000972463.pdf.jpgf55f1eefd3d96d75d0a9321d7bb9be78MD5310183/1269692023-07-15 03:28:13.619484oai:www.lume.ufrgs.br:10183/126969Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-15T06:28:13Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Probing embedded star clusters in the HII complex NGC6357 with VVV |
title |
Probing embedded star clusters in the HII complex NGC6357 with VVV |
spellingShingle |
Probing embedded star clusters in the HII complex NGC6357 with VVV Lima, Eliade Ferreira Aglomerados estelares Formacao de estrelas Estrelas binarias Regiões HII Fotometria estelar Open clusters and associations: general Open clusters and associations: individual: NGC6357 Instrumentation: adaptive optics |
title_short |
Probing embedded star clusters in the HII complex NGC6357 with VVV |
title_full |
Probing embedded star clusters in the HII complex NGC6357 with VVV |
title_fullStr |
Probing embedded star clusters in the HII complex NGC6357 with VVV |
title_full_unstemmed |
Probing embedded star clusters in the HII complex NGC6357 with VVV |
title_sort |
Probing embedded star clusters in the HII complex NGC6357 with VVV |
author |
Lima, Eliade Ferreira |
author_facet |
Lima, Eliade Ferreira Bica, Eduardo Luiz Damiani Bonatto, Charles Jose Saito, Roberto K. |
author_role |
author |
author2 |
Bica, Eduardo Luiz Damiani Bonatto, Charles Jose Saito, Roberto K. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Lima, Eliade Ferreira Bica, Eduardo Luiz Damiani Bonatto, Charles Jose Saito, Roberto K. |
dc.subject.por.fl_str_mv |
Aglomerados estelares Formacao de estrelas Estrelas binarias Regiões HII Fotometria estelar |
topic |
Aglomerados estelares Formacao de estrelas Estrelas binarias Regiões HII Fotometria estelar Open clusters and associations: general Open clusters and associations: individual: NGC6357 Instrumentation: adaptive optics |
dc.subject.eng.fl_str_mv |
Open clusters and associations: general Open clusters and associations: individual: NGC6357 Instrumentation: adaptive optics |
description |
Context. NGC6357 is an active star-forming region located in the Sagittarius arm that displays several star clusters, which makes it a very interesting target to investigate star formation and early cluster evolution. Aims. We explore NGC6357 with the VISTA Variables in the Vía Láctea (VVV) photometry of seven embedded clusters (ECs), and one open cluster projected in the outskirts of the complex. Methods. Photometric and structural properties (age, reddening, distance, core, and total radii) of the star clusters were derived. VVV saturated stars were replaced by their 2MASS counterparts. Field-decontaminated VVV photometry was used to analyse colour– magnitude diagrams (CMDs) and stellar radial density profiles and determine astrophysical parameters. Results. We report the discovery of four ECs and one intermediate-age cluster in the complex area. We derive a revised distance estimate for NGC6357 of 1.78 ± 0.1 kpc based on the cluster CMD morphologies. Of the ECs, one contains the binary star WR93, while the remaining ones are dominated by pre-main sequence stars, young stellar objects, and/or and have a developed main sequence. These features reflect a significant age spread among the clusters. Evidence is found that the relatively populous cluster Pismis 24 hosts two subclusters. |
publishDate |
2014 |
dc.date.issued.fl_str_mv |
2014 |
dc.date.accessioned.fl_str_mv |
2015-09-18T01:58:24Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/126969 |
dc.identifier.issn.pt_BR.fl_str_mv |
0004-6361 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000972463 |
identifier_str_mv |
0004-6361 000972463 |
url |
http://hdl.handle.net/10183/126969 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. Les Ulis. Vol. 568 (Aug. 2014), A16, 11 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/126969/1/000972463.pdf http://www.lume.ufrgs.br/bitstream/10183/126969/2/000972463.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/126969/3/000972463.pdf.jpg |
bitstream.checksum.fl_str_mv |
0d2091f08f8a4c76efd4e1af6ca61fbc 4c255de985e77dfa0975bb04f9361567 f55f1eefd3d96d75d0a9321d7bb9be78 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1801224886493904896 |