Low-mass variable stars in the globular cluster NGC 6397

Detalhes bibliográficos
Autor(a) principal: Martinazzi, Elizandra
Data de Publicação: 2017
Outros Autores: Kepler, Souza Oliveira, Costa, Jose Eduardo da Silveira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/169606
Resumo: We have conducted a photometric survey of the globular cluster NGC 6397 in a search for variable stars. We obtained ∼11 h of time-resolved photometric images with one European Southern Observatory-Very Large Telescope using the FOcal Reducer and low dispersion Spectrograph imager distributed over two consecutive nights. We analysed 8391 light curves of stars brighter than magnitude 23 with the 465-nm filter, and we identified 412 variable stars, reaching ∼4.8 ± 0.2 per cent of variability with time-scales between 0.004 and 2 d, with amplitudes variation greater than ±0.2 mag.
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spelling Martinazzi, ElizandraKepler, Souza OliveiraCosta, Jose Eduardo da Silveira2017-10-20T02:26:33Z20170035-8711http://hdl.handle.net/10183/169606001044566We have conducted a photometric survey of the globular cluster NGC 6397 in a search for variable stars. We obtained ∼11 h of time-resolved photometric images with one European Southern Observatory-Very Large Telescope using the FOcal Reducer and low dispersion Spectrograph imager distributed over two consecutive nights. We analysed 8391 light curves of stars brighter than magnitude 23 with the 465-nm filter, and we identified 412 variable stars, reaching ∼4.8 ± 0.2 per cent of variability with time-scales between 0.004 and 2 d, with amplitudes variation greater than ±0.2 mag.application/pdfengMonthly notices of the Royal Astronomical Society. Oxford. Vol. 468, no. 3 (July 2017), p. 2816–2821Fotometria estelarEstrelas variaveisMetalicidadeAglomerado globular NGC 6397ConvectionMethods: data analysisTechniques: photometricStars: chromospheresStars: low-massStars: variables: generalLow-mass variable stars in the globular cluster NGC 6397Estrangeiroinfo: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:UFRGSORIGINAL001044566.pdf001044566.pdfTexto completo (inglês)application/pdf1832409http://www.lume.ufrgs.br/bitstream/10183/169606/1/001044566.pdffadc8a2c27a4c3c29221b1157134d7daMD51TEXT001044566.pdf.txt001044566.pdf.txtExtracted Texttext/plain25876http://www.lume.ufrgs.br/bitstream/10183/169606/2/001044566.pdf.txtc785ee022e586554829274717fda81edMD52THUMBNAIL001044566.pdf.jpg001044566.pdf.jpgGenerated Thumbnailimage/jpeg2060http://www.lume.ufrgs.br/bitstream/10183/169606/3/001044566.pdf.jpg5e28de8e6471305ff4815699e54ed62cMD5310183/1696062023-08-16 03:30:34.34859oai:www.lume.ufrgs.br:10183/169606Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-16T06:30:34Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Low-mass variable stars in the globular cluster NGC 6397
title Low-mass variable stars in the globular cluster NGC 6397
spellingShingle Low-mass variable stars in the globular cluster NGC 6397
Martinazzi, Elizandra
Fotometria estelar
Estrelas variaveis
Metalicidade
Aglomerado globular NGC 6397
Convection
Methods: data analysis
Techniques: photometric
Stars: chromospheres
Stars: low-mass
Stars: variables: general
title_short Low-mass variable stars in the globular cluster NGC 6397
title_full Low-mass variable stars in the globular cluster NGC 6397
title_fullStr Low-mass variable stars in the globular cluster NGC 6397
title_full_unstemmed Low-mass variable stars in the globular cluster NGC 6397
title_sort Low-mass variable stars in the globular cluster NGC 6397
author Martinazzi, Elizandra
author_facet Martinazzi, Elizandra
Kepler, Souza Oliveira
Costa, Jose Eduardo da Silveira
author_role author
author2 Kepler, Souza Oliveira
Costa, Jose Eduardo da Silveira
author2_role author
author
dc.contributor.author.fl_str_mv Martinazzi, Elizandra
Kepler, Souza Oliveira
Costa, Jose Eduardo da Silveira
dc.subject.por.fl_str_mv Fotometria estelar
Estrelas variaveis
Metalicidade
Aglomerado globular NGC 6397
topic Fotometria estelar
Estrelas variaveis
Metalicidade
Aglomerado globular NGC 6397
Convection
Methods: data analysis
Techniques: photometric
Stars: chromospheres
Stars: low-mass
Stars: variables: general
dc.subject.eng.fl_str_mv Convection
Methods: data analysis
Techniques: photometric
Stars: chromospheres
Stars: low-mass
Stars: variables: general
description We have conducted a photometric survey of the globular cluster NGC 6397 in a search for variable stars. We obtained ∼11 h of time-resolved photometric images with one European Southern Observatory-Very Large Telescope using the FOcal Reducer and low dispersion Spectrograph imager distributed over two consecutive nights. We analysed 8391 light curves of stars brighter than magnitude 23 with the 465-nm filter, and we identified 412 variable stars, reaching ∼4.8 ± 0.2 per cent of variability with time-scales between 0.004 and 2 d, with amplitudes variation greater than ±0.2 mag.
publishDate 2017
dc.date.accessioned.fl_str_mv 2017-10-20T02:26:33Z
dc.date.issued.fl_str_mv 2017
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/10183/169606
dc.identifier.issn.pt_BR.fl_str_mv 0035-8711
dc.identifier.nrb.pt_BR.fl_str_mv 001044566
identifier_str_mv 0035-8711
001044566
url http://hdl.handle.net/10183/169606
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Monthly notices of the Royal Astronomical Society. Oxford. Vol. 468, no. 3 (July 2017), p. 2816–2821
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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instname:Universidade Federal do Rio Grande do Sul (UFRGS)
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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
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