Kinematics of the central regions of NGC 1672
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/108828 |
Resumo: | We present the detailed velocity field of the central 2 kpc of the LINER galaxy NGC 1672. The iso- velocity map shows a rotational pattern with a velocity gradient of 50 km s-ˡ arcsec-ˡ in the inner 6" (1"≈ 70 pc), indicating a mass of ≈ 9x 108 Mʘ inside a radius of 125 pc, equivalent to a density of ≈ 2 x 1011 Mʘ kpc-³. It also shows some asymmetries on a larger scale. An o†set of ≈ 60 pc between the nuclear continuum barycenter and the kinematical center is also found. Satoh"s model Ðtting to the observed velocity Ðeld reveals several nonaxisymmetric residuals, which do not correlate well with the bar or the circumnuclear ring of H II regions. The inner rotation curve of NGC 1672 reveals that the circumnuclear ring of star formation is located on an inner Lindblad resonance (ILR), and not near the peak of the Lindblad curve, Ω − (k/2), as suggested by previous works, which also claimed that the ring rotates faster than its ambient. This motion is not conÐrmed by the two-dimensional residual- velocity map. |
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Díaz, Rubén JoaquínCarranza, Gustavo JoseDottori, Horacio AlbertoGoldes, G.2015-01-08T02:13:02Z19990004-637Xhttp://hdl.handle.net/10183/108828000242093We present the detailed velocity field of the central 2 kpc of the LINER galaxy NGC 1672. The iso- velocity map shows a rotational pattern with a velocity gradient of 50 km s-ˡ arcsec-ˡ in the inner 6" (1"≈ 70 pc), indicating a mass of ≈ 9x 108 Mʘ inside a radius of 125 pc, equivalent to a density of ≈ 2 x 1011 Mʘ kpc-³. It also shows some asymmetries on a larger scale. An o†set of ≈ 60 pc between the nuclear continuum barycenter and the kinematical center is also found. Satoh"s model Ðtting to the observed velocity Ðeld reveals several nonaxisymmetric residuals, which do not correlate well with the bar or the circumnuclear ring of H II regions. The inner rotation curve of NGC 1672 reveals that the circumnuclear ring of star formation is located on an inner Lindblad resonance (ILR), and not near the peak of the Lindblad curve, Ω − (k/2), as suggested by previous works, which also claimed that the ring rotates faster than its ambient. This motion is not conÐrmed by the two-dimensional residual- velocity map.application/pdfengThe astrophysical journal. Chicago. Vol. 512, no. 2, pt. 1 (Feb. 1999), p. 623-629Galáxia NGC 1672Galáxias ativasEspectros astronômicosNucleo galaticoDinamica estelarGalaxies : activeGalaxies : individual (NGC 1672)Galaxies : kinematics and dynamicsGalaxies : nucleiKinematics of the central regions of NGC 1672Estrangeiroinfo: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:UFRGSORIGINAL000242093.pdf000242093.pdfTexto completo (inglês)application/pdf130339http://www.lume.ufrgs.br/bitstream/10183/108828/1/000242093.pdf8edc06009096eae80d19b67c394ea5a9MD51TEXT000242093.pdf.txt000242093.pdf.txtExtracted Texttext/plain28668http://www.lume.ufrgs.br/bitstream/10183/108828/2/000242093.pdf.txtb9d6767edc430d79ff8d55b2900d3a5dMD52THUMBNAIL000242093.pdf.jpg000242093.pdf.jpgGenerated Thumbnailimage/jpeg2274http://www.lume.ufrgs.br/bitstream/10183/108828/3/000242093.pdf.jpg5f24b986c80796258448e797bfd38cd6MD5310183/1088282018-10-23 08:34:54.492oai:www.lume.ufrgs.br:10183/108828Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-23T11:34:54Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Kinematics of the central regions of NGC 1672 |
title |
Kinematics of the central regions of NGC 1672 |
spellingShingle |
Kinematics of the central regions of NGC 1672 Díaz, Rubén Joaquín Galáxia NGC 1672 Galáxias ativas Espectros astronômicos Nucleo galatico Dinamica estelar Galaxies : active Galaxies : individual (NGC 1672) Galaxies : kinematics and dynamics Galaxies : nuclei |
title_short |
Kinematics of the central regions of NGC 1672 |
title_full |
Kinematics of the central regions of NGC 1672 |
title_fullStr |
Kinematics of the central regions of NGC 1672 |
title_full_unstemmed |
Kinematics of the central regions of NGC 1672 |
title_sort |
Kinematics of the central regions of NGC 1672 |
author |
Díaz, Rubén Joaquín |
author_facet |
Díaz, Rubén Joaquín Carranza, Gustavo Jose Dottori, Horacio Alberto Goldes, G. |
author_role |
author |
author2 |
Carranza, Gustavo Jose Dottori, Horacio Alberto Goldes, G. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Díaz, Rubén Joaquín Carranza, Gustavo Jose Dottori, Horacio Alberto Goldes, G. |
dc.subject.por.fl_str_mv |
Galáxia NGC 1672 Galáxias ativas Espectros astronômicos Nucleo galatico Dinamica estelar |
topic |
Galáxia NGC 1672 Galáxias ativas Espectros astronômicos Nucleo galatico Dinamica estelar Galaxies : active Galaxies : individual (NGC 1672) Galaxies : kinematics and dynamics Galaxies : nuclei |
dc.subject.eng.fl_str_mv |
Galaxies : active Galaxies : individual (NGC 1672) Galaxies : kinematics and dynamics Galaxies : nuclei |
description |
We present the detailed velocity field of the central 2 kpc of the LINER galaxy NGC 1672. The iso- velocity map shows a rotational pattern with a velocity gradient of 50 km s-ˡ arcsec-ˡ in the inner 6" (1"≈ 70 pc), indicating a mass of ≈ 9x 108 Mʘ inside a radius of 125 pc, equivalent to a density of ≈ 2 x 1011 Mʘ kpc-³. It also shows some asymmetries on a larger scale. An o†set of ≈ 60 pc between the nuclear continuum barycenter and the kinematical center is also found. Satoh"s model Ðtting to the observed velocity Ðeld reveals several nonaxisymmetric residuals, which do not correlate well with the bar or the circumnuclear ring of H II regions. The inner rotation curve of NGC 1672 reveals that the circumnuclear ring of star formation is located on an inner Lindblad resonance (ILR), and not near the peak of the Lindblad curve, Ω − (k/2), as suggested by previous works, which also claimed that the ring rotates faster than its ambient. This motion is not conÐrmed by the two-dimensional residual- velocity map. |
publishDate |
1999 |
dc.date.issued.fl_str_mv |
1999 |
dc.date.accessioned.fl_str_mv |
2015-01-08T02:13:02Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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article |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/108828 |
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0004-637X |
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000242093 |
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0004-637X 000242093 |
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http://hdl.handle.net/10183/108828 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The astrophysical journal. Chicago. Vol. 512, no. 2, pt. 1 (Feb. 1999), p. 623-629 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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