Constraints on the star formation history of the Large Magellanic Cloud
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/98519 |
Resumo: | We present the analysis of deep colour–magnitude diagrams (CMDs) of 6 stellar fields in the LMC. The data were obtained using HST/WFPC2 in the F814W (∼I) and F555W (∼V) filters, reaching V555 ∼ 26.5.We discuss and apply a method of correcting CMDs for photometric incompleteness. A method to generate artificial CMDs based on a model star formation history is also developed. This method incorporates photometric error effects, unresolved binaries, reddening and allows use of different forms of the initial mass function and of the SFH itself. We use the Partial Models Method, as presented by Gallart and others, for CMD modelling, and include control experiments to prove its validity in a search for constraints on the Large Magellanic Cloud star formation history in different regions. Reliable star formation histories for each field are recovered by this method. In all fields, a gap in star formation with τ ∼ 700 Myr is observed. Field-to-field variations have also been observed. The two fields near the LMC bar present some significant star forming events, having formed both young (τ <∼ 1 Gyr) and old (τ >∼ 10 Gyr) stars, with a clear gap from 3−6 Gyr. Two other fields display quite similar SFHs, with increased star formation having taken place at τ - ~ 2−3 Gyr and 6 <∼ τ <∼ 10 Gyr. The remaining two fields present star formation histories closer to uniform, with no clear event of enhanced star formation. |
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Javiel, Sandro CaldeiraSantiago, Basilio XavierKerber, Leandro de Oliveira2014-07-24T02:04:25Z20050004-6361http://hdl.handle.net/10183/98519000456064We present the analysis of deep colour–magnitude diagrams (CMDs) of 6 stellar fields in the LMC. The data were obtained using HST/WFPC2 in the F814W (∼I) and F555W (∼V) filters, reaching V555 ∼ 26.5.We discuss and apply a method of correcting CMDs for photometric incompleteness. A method to generate artificial CMDs based on a model star formation history is also developed. This method incorporates photometric error effects, unresolved binaries, reddening and allows use of different forms of the initial mass function and of the SFH itself. We use the Partial Models Method, as presented by Gallart and others, for CMD modelling, and include control experiments to prove its validity in a search for constraints on the Large Magellanic Cloud star formation history in different regions. Reliable star formation histories for each field are recovered by this method. In all fields, a gap in star formation with τ ∼ 700 Myr is observed. Field-to-field variations have also been observed. The two fields near the LMC bar present some significant star forming events, having formed both young (τ <∼ 1 Gyr) and old (τ >∼ 10 Gyr) stars, with a clear gap from 3−6 Gyr. Two other fields display quite similar SFHs, with increased star formation having taken place at τ - ~ 2−3 Gyr and 6 <∼ τ <∼ 10 Gyr. The remaining two fields present star formation histories closer to uniform, with no clear event of enhanced star formation.application/pdfengAstronomy and astrophysics. Vol. 431, no. 1 (Feb. 2005), p. 73-85AstronomiaGalaxies: formationGalaxies: evolutionStars: statisticsStars: luminosity function, mass functionGalaxies: stellar contentStars: Hertzsprung-Russell (HR) and C-MConstraints on the star formation history of the Large Magellanic CloudEstrangeiroinfo: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:UFRGSORIGINAL000456064.pdf000456064.pdfTexto completo (inglês)application/pdf1737628http://www.lume.ufrgs.br/bitstream/10183/98519/1/000456064.pdf2ed4b773caad4144bd0bbd35cb0c76f9MD51TEXT000456064.pdf.txt000456064.pdf.txtExtracted Texttext/plain59572http://www.lume.ufrgs.br/bitstream/10183/98519/2/000456064.pdf.txt5912491bedcfc0247e3eec46f805a4b8MD52THUMBNAIL000456064.pdf.jpg000456064.pdf.jpgGenerated Thumbnailimage/jpeg2029http://www.lume.ufrgs.br/bitstream/10183/98519/3/000456064.pdf.jpg498a86508e7e2d33536f91aa29315558MD5310183/985192023-07-04 03:52:54.540398oai:www.lume.ufrgs.br:10183/98519Repositório InstitucionalPUBhttps://lume.ufrgs.br/oai/requestlume@ufrgs.bropendoar:2023-07-04T06:52:54Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Constraints on the star formation history of the Large Magellanic Cloud |
title |
Constraints on the star formation history of the Large Magellanic Cloud |
spellingShingle |
Constraints on the star formation history of the Large Magellanic Cloud Javiel, Sandro Caldeira Astronomia Galaxies: formation Galaxies: evolution Stars: statistics Stars: luminosity function, mass function Galaxies: stellar content Stars: Hertzsprung-Russell (HR) and C-M |
title_short |
Constraints on the star formation history of the Large Magellanic Cloud |
title_full |
Constraints on the star formation history of the Large Magellanic Cloud |
title_fullStr |
Constraints on the star formation history of the Large Magellanic Cloud |
title_full_unstemmed |
Constraints on the star formation history of the Large Magellanic Cloud |
title_sort |
Constraints on the star formation history of the Large Magellanic Cloud |
author |
Javiel, Sandro Caldeira |
author_facet |
Javiel, Sandro Caldeira Santiago, Basilio Xavier Kerber, Leandro de Oliveira |
author_role |
author |
author2 |
Santiago, Basilio Xavier Kerber, Leandro de Oliveira |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Javiel, Sandro Caldeira Santiago, Basilio Xavier Kerber, Leandro de Oliveira |
dc.subject.por.fl_str_mv |
Astronomia |
topic |
Astronomia Galaxies: formation Galaxies: evolution Stars: statistics Stars: luminosity function, mass function Galaxies: stellar content Stars: Hertzsprung-Russell (HR) and C-M |
dc.subject.eng.fl_str_mv |
Galaxies: formation Galaxies: evolution Stars: statistics Stars: luminosity function, mass function Galaxies: stellar content Stars: Hertzsprung-Russell (HR) and C-M |
description |
We present the analysis of deep colour–magnitude diagrams (CMDs) of 6 stellar fields in the LMC. The data were obtained using HST/WFPC2 in the F814W (∼I) and F555W (∼V) filters, reaching V555 ∼ 26.5.We discuss and apply a method of correcting CMDs for photometric incompleteness. A method to generate artificial CMDs based on a model star formation history is also developed. This method incorporates photometric error effects, unresolved binaries, reddening and allows use of different forms of the initial mass function and of the SFH itself. We use the Partial Models Method, as presented by Gallart and others, for CMD modelling, and include control experiments to prove its validity in a search for constraints on the Large Magellanic Cloud star formation history in different regions. Reliable star formation histories for each field are recovered by this method. In all fields, a gap in star formation with τ ∼ 700 Myr is observed. Field-to-field variations have also been observed. The two fields near the LMC bar present some significant star forming events, having formed both young (τ <∼ 1 Gyr) and old (τ >∼ 10 Gyr) stars, with a clear gap from 3−6 Gyr. Two other fields display quite similar SFHs, with increased star formation having taken place at τ - ~ 2−3 Gyr and 6 <∼ τ <∼ 10 Gyr. The remaining two fields present star formation histories closer to uniform, with no clear event of enhanced star formation. |
publishDate |
2005 |
dc.date.issued.fl_str_mv |
2005 |
dc.date.accessioned.fl_str_mv |
2014-07-24T02:04:25Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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article |
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publishedVersion |
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0004-6361 |
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000456064 |
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http://hdl.handle.net/10183/98519 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. Vol. 431, no. 1 (Feb. 2005), p. 73-85 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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