A morphological method to determine corotation radII in spiral galaxies
Autor(a) principal: | |
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Data de Publicação: | 1997 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/108777 |
Resumo: | Shock-induced star formation in a stellar density wave scenario produces an azimuthal gradient of ages across the spiral arms that has opposite signs on either side of the corotation resonance (CR). We present a method based on the Fourier analysis of azimuthal profiles to locate the CR and determine the arm character (trailing or leading) in spiral galaxies. Basically, we compare the behavior of the phase angle of the two-armed spiral in blue and infrared colors that pick out, respectively, young and older disk stellar population. We illustrate the method using theoretical leading and trailing spirals. We have also applied the method to the spiral galaxies NGC 7479, for which we confirm the reported leading arms, and NGC 1832. In these galaxies, we find two and three CRs, respectively. |
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Puerari, IvanioDottori, Horacio Alberto2015-01-07T02:10:40Z19970004-637Xhttp://hdl.handle.net/10183/108777000192475Shock-induced star formation in a stellar density wave scenario produces an azimuthal gradient of ages across the spiral arms that has opposite signs on either side of the corotation resonance (CR). We present a method based on the Fourier analysis of azimuthal profiles to locate the CR and determine the arm character (trailing or leading) in spiral galaxies. Basically, we compare the behavior of the phase angle of the two-armed spiral in blue and infrared colors that pick out, respectively, young and older disk stellar population. We illustrate the method using theoretical leading and trailing spirals. We have also applied the method to the spiral galaxies NGC 7479, for which we confirm the reported leading arms, and NGC 1832. In these galaxies, we find two and three CRs, respectively.application/pdfengThe Astrophysical journal. Chicago. Vol. 476, no. 2, pt. 2 (Feb. 1997), p. l73-l75Astrofisica extragalaticaGaláxiasAstronomia infravermelhaTecnicas astronomicasGalaxies: individual (NGC 1832, NGC 7479)Galaxies: kinematics and dynamicsGalaxies: spiralMethods: analyticalA morphological method to determine corotation radII in spiral galaxiesEstrangeiroinfo: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:UFRGSORIGINAL000192475.pdf000192475.pdfTexto completo (inglês)application/pdf903509http://www.lume.ufrgs.br/bitstream/10183/108777/1/000192475.pdf156b04da7df869c31509b836bb84d4d1MD51TEXT000192475.pdf.txt000192475.pdf.txtExtracted Texttext/plain12047http://www.lume.ufrgs.br/bitstream/10183/108777/2/000192475.pdf.txt9067c8c5b7f5e371422c6a15d088ac8dMD52THUMBNAIL000192475.pdf.jpg000192475.pdf.jpgGenerated Thumbnailimage/jpeg1959http://www.lume.ufrgs.br/bitstream/10183/108777/3/000192475.pdf.jpg537345cbe4b49a347ae4283d73d436ceMD5310183/1087772018-10-23 08:35:15.318oai:www.lume.ufrgs.br:10183/108777Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-23T11:35:15Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
A morphological method to determine corotation radII in spiral galaxies |
title |
A morphological method to determine corotation radII in spiral galaxies |
spellingShingle |
A morphological method to determine corotation radII in spiral galaxies Puerari, Ivanio Astrofisica extragalatica Galáxias Astronomia infravermelha Tecnicas astronomicas Galaxies: individual (NGC 1832, NGC 7479) Galaxies: kinematics and dynamics Galaxies: spiral Methods: analytical |
title_short |
A morphological method to determine corotation radII in spiral galaxies |
title_full |
A morphological method to determine corotation radII in spiral galaxies |
title_fullStr |
A morphological method to determine corotation radII in spiral galaxies |
title_full_unstemmed |
A morphological method to determine corotation radII in spiral galaxies |
title_sort |
A morphological method to determine corotation radII in spiral galaxies |
author |
Puerari, Ivanio |
author_facet |
Puerari, Ivanio Dottori, Horacio Alberto |
author_role |
author |
author2 |
Dottori, Horacio Alberto |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Puerari, Ivanio Dottori, Horacio Alberto |
dc.subject.por.fl_str_mv |
Astrofisica extragalatica Galáxias Astronomia infravermelha Tecnicas astronomicas |
topic |
Astrofisica extragalatica Galáxias Astronomia infravermelha Tecnicas astronomicas Galaxies: individual (NGC 1832, NGC 7479) Galaxies: kinematics and dynamics Galaxies: spiral Methods: analytical |
dc.subject.eng.fl_str_mv |
Galaxies: individual (NGC 1832, NGC 7479) Galaxies: kinematics and dynamics Galaxies: spiral Methods: analytical |
description |
Shock-induced star formation in a stellar density wave scenario produces an azimuthal gradient of ages across the spiral arms that has opposite signs on either side of the corotation resonance (CR). We present a method based on the Fourier analysis of azimuthal profiles to locate the CR and determine the arm character (trailing or leading) in spiral galaxies. Basically, we compare the behavior of the phase angle of the two-armed spiral in blue and infrared colors that pick out, respectively, young and older disk stellar population. We illustrate the method using theoretical leading and trailing spirals. We have also applied the method to the spiral galaxies NGC 7479, for which we confirm the reported leading arms, and NGC 1832. In these galaxies, we find two and three CRs, respectively. |
publishDate |
1997 |
dc.date.issued.fl_str_mv |
1997 |
dc.date.accessioned.fl_str_mv |
2015-01-07T02:10:40Z |
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/10183/108777 |
dc.identifier.issn.pt_BR.fl_str_mv |
0004-637X |
dc.identifier.nrb.pt_BR.fl_str_mv |
000192475 |
identifier_str_mv |
0004-637X 000192475 |
url |
http://hdl.handle.net/10183/108777 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The Astrophysical journal. Chicago. Vol. 476, no. 2, pt. 2 (Feb. 1997), p. l73-l75 |
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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