A morphological method to determine corotation radII in spiral galaxies

Detalhes bibliográficos
Autor(a) principal: Puerari, Ivanio
Data de Publicação: 1997
Outros Autores: Dottori, Horacio Alberto
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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spelling 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
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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
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url http://hdl.handle.net/10183/108777
dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv The Astrophysical journal. Chicago. Vol. 476, no. 2, pt. 2 (Feb. 1997), p. l73-l75
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