Multichromatic colour–magnitude diagrams of the globular cluster NGC 6366
Main Author: | |
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Publication Date: | 2013 |
Other Authors: | , , |
Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UFRGS |
Download full: | http://hdl.handle.net/10183/93389 |
Summary: | We present multichromatic isochrone fits to the colour–magnitude data of the globular cluster NGC 6366, based on Hubble Space Telescope Advanced Camera for Surveys/Wide Field Channel and Southern Astrophysical Research photometric data.We corrected the photometric data for differential reddening and calculated the mean ridge line of the colour–magnitude diagrams. We compared the isochrones of Dartmouth Stellar Evolution Database and PAdova and TRieste Stellar Evolution Code both with microscopic diffusion starting on the main sequence. Bracketing all previous determinations of this cluster, we tested metallicities from [Fe/H]=−1.00 to [Fe/H]=−0.50, and ages from 9 to 13 Gyr. After determining the total to selective extinction ratio only from stars belonging to this cluster, RV = 3.06 ± 0.14, we found the parameters for this cluster to be E(B − V) = 0.69 ± 0.02(int) ±0.04(ext), (m − M)V = 15.02 ± 0.07(int) ±0.13(ext), Age = 11 ± 1.15 Gyr. Evolutionary models fail to reproduce the low-Teff sequence in multiband colour–magnitude diagrams, indicating that they still have an incomplete physics. We found that the Dartmouth Stellar Evolution Database isochrones better fit the subgiant branch and low main sequence than the PAdova and TRieste Stellar Evolution Code. |
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Campos, FabíolaKepler, Souza OliveiraBonatto, Charles JoseDucati, Jorge Ricardo2014-04-13T01:50:00Z20130035-8711http://hdl.handle.net/10183/93389000903111We present multichromatic isochrone fits to the colour–magnitude data of the globular cluster NGC 6366, based on Hubble Space Telescope Advanced Camera for Surveys/Wide Field Channel and Southern Astrophysical Research photometric data.We corrected the photometric data for differential reddening and calculated the mean ridge line of the colour–magnitude diagrams. We compared the isochrones of Dartmouth Stellar Evolution Database and PAdova and TRieste Stellar Evolution Code both with microscopic diffusion starting on the main sequence. Bracketing all previous determinations of this cluster, we tested metallicities from [Fe/H]=−1.00 to [Fe/H]=−0.50, and ages from 9 to 13 Gyr. After determining the total to selective extinction ratio only from stars belonging to this cluster, RV = 3.06 ± 0.14, we found the parameters for this cluster to be E(B − V) = 0.69 ± 0.02(int) ±0.04(ext), (m − M)V = 15.02 ± 0.07(int) ±0.13(ext), Age = 11 ± 1.15 Gyr. Evolutionary models fail to reproduce the low-Teff sequence in multiband colour–magnitude diagrams, indicating that they still have an incomplete physics. We found that the Dartmouth Stellar Evolution Database isochrones better fit the subgiant branch and low main sequence than the PAdova and TRieste Stellar Evolution Code.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 433, no. 1 (July 2013), p. 243-250Aglomerados estelares globularesEvolucao estelarGlobular clusters: generalGlobular clusters: individual: NGC 6366Multichromatic colour–magnitude diagrams of the globular cluster NGC 6366Estrangeiroinfo: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:UFRGSORIGINAL000903111.pdf000903111.pdfTexto completo (inglês)application/pdf2987387http://www.lume.ufrgs.br/bitstream/10183/93389/1/000903111.pdf30efc8c3eebdc76a94cfcb16e9563beaMD51TEXT000903111.pdf.txt000903111.pdf.txtExtracted Texttext/plain37802http://www.lume.ufrgs.br/bitstream/10183/93389/2/000903111.pdf.txt9e820319d52f0314572ca01a2a468ee7MD52THUMBNAIL000903111.pdf.jpg000903111.pdf.jpgGenerated Thumbnailimage/jpeg2331http://www.lume.ufrgs.br/bitstream/10183/93389/3/000903111.pdf.jpgc33d3f32be520fc1c1b73fae49a18b61MD5310183/933892023-07-15 03:28:32.844667oai:www.lume.ufrgs.br:10183/93389Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-15T06:28:32Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Multichromatic colour–magnitude diagrams of the globular cluster NGC 6366 |
title |
Multichromatic colour–magnitude diagrams of the globular cluster NGC 6366 |
spellingShingle |
Multichromatic colour–magnitude diagrams of the globular cluster NGC 6366 Campos, Fabíola Aglomerados estelares globulares Evolucao estelar Globular clusters: general Globular clusters: individual: NGC 6366 |
title_short |
Multichromatic colour–magnitude diagrams of the globular cluster NGC 6366 |
title_full |
Multichromatic colour–magnitude diagrams of the globular cluster NGC 6366 |
title_fullStr |
Multichromatic colour–magnitude diagrams of the globular cluster NGC 6366 |
title_full_unstemmed |
Multichromatic colour–magnitude diagrams of the globular cluster NGC 6366 |
title_sort |
Multichromatic colour–magnitude diagrams of the globular cluster NGC 6366 |
author |
Campos, Fabíola |
author_facet |
Campos, Fabíola Kepler, Souza Oliveira Bonatto, Charles Jose Ducati, Jorge Ricardo |
author_role |
author |
author2 |
Kepler, Souza Oliveira Bonatto, Charles Jose Ducati, Jorge Ricardo |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Campos, Fabíola Kepler, Souza Oliveira Bonatto, Charles Jose Ducati, Jorge Ricardo |
dc.subject.por.fl_str_mv |
Aglomerados estelares globulares Evolucao estelar |
topic |
Aglomerados estelares globulares Evolucao estelar Globular clusters: general Globular clusters: individual: NGC 6366 |
dc.subject.eng.fl_str_mv |
Globular clusters: general Globular clusters: individual: NGC 6366 |
description |
We present multichromatic isochrone fits to the colour–magnitude data of the globular cluster NGC 6366, based on Hubble Space Telescope Advanced Camera for Surveys/Wide Field Channel and Southern Astrophysical Research photometric data.We corrected the photometric data for differential reddening and calculated the mean ridge line of the colour–magnitude diagrams. We compared the isochrones of Dartmouth Stellar Evolution Database and PAdova and TRieste Stellar Evolution Code both with microscopic diffusion starting on the main sequence. Bracketing all previous determinations of this cluster, we tested metallicities from [Fe/H]=−1.00 to [Fe/H]=−0.50, and ages from 9 to 13 Gyr. After determining the total to selective extinction ratio only from stars belonging to this cluster, RV = 3.06 ± 0.14, we found the parameters for this cluster to be E(B − V) = 0.69 ± 0.02(int) ±0.04(ext), (m − M)V = 15.02 ± 0.07(int) ±0.13(ext), Age = 11 ± 1.15 Gyr. Evolutionary models fail to reproduce the low-Teff sequence in multiband colour–magnitude diagrams, indicating that they still have an incomplete physics. We found that the Dartmouth Stellar Evolution Database isochrones better fit the subgiant branch and low main sequence than the PAdova and TRieste Stellar Evolution Code. |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013 |
dc.date.accessioned.fl_str_mv |
2014-04-13T01:50:00Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10183/93389 |
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0035-8711 |
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000903111 |
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url |
http://hdl.handle.net/10183/93389 |
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. 433, no. 1 (July 2013), p. 243-250 |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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