Morphology of AGN emission-line regions in SDSS-IV MaNGA survey
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/184938 |
Resumo: | Extended narrow-line regions (NLRs) around active galactic nuclei (AGN) are shaped by the distribution of gas in the host galaxy and by the geometry of the circumnuclear obscuration, and thus they can be used to test the AGN unification model. In this work, we quantify the morphologies of the NLRs in 308 nearby AGN (z = 0 − 0.14, Lbol∼1042.4 − 44.1 erg s−1) from the MaNGA survey. Based on the NLR maps, we find that a large fraction (81 per cent) of these AGN have bi-conical NLR morphology. The distribution of their measured opening angles suggests that the intrinsic opening angles of the ionization cones have a mean value of 85◦–98◦ with a finite spread of 39◦–44◦ (1σ). Our inferred opening angle distribution implies a number ratio of type I to type II AGN of 1:1.6–2.3, consistent with other measurements of the type I/type II ratio at low AGN luminosities. Combining these measurements with the WISE photometry data, we find that redder mid-IR colour (lower effective temperature of dust) corresponds to stronger and narrower photoionized bicones. This relation is in agreement with the unification model that suggests that the bi-conical NLRs are shaped by a toroidal dusty structure within a few pc from the AGN. Furthermore, we find a significant alignment between theminor axis of host galaxy discs andAGNionization cones. Together, these findings suggest that obscuration on both circumnuclear (∼pc) and galactic (∼ kpc) scales is important in shaping and orienting the AGN NLRs. |
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He, ZhichengSun, Ai-LeiZakamska, Nadia L.Wylezalek, DominikaKelly, MichaelGreene, Jenny E.Rembold, Sandro BarbozaRiffel, RogérioRiffel, Rogemar André2018-11-22T02:49:14Z20180035-8711http://hdl.handle.net/10183/184938001080926Extended narrow-line regions (NLRs) around active galactic nuclei (AGN) are shaped by the distribution of gas in the host galaxy and by the geometry of the circumnuclear obscuration, and thus they can be used to test the AGN unification model. In this work, we quantify the morphologies of the NLRs in 308 nearby AGN (z = 0 − 0.14, Lbol∼1042.4 − 44.1 erg s−1) from the MaNGA survey. Based on the NLR maps, we find that a large fraction (81 per cent) of these AGN have bi-conical NLR morphology. The distribution of their measured opening angles suggests that the intrinsic opening angles of the ionization cones have a mean value of 85◦–98◦ with a finite spread of 39◦–44◦ (1σ). Our inferred opening angle distribution implies a number ratio of type I to type II AGN of 1:1.6–2.3, consistent with other measurements of the type I/type II ratio at low AGN luminosities. Combining these measurements with the WISE photometry data, we find that redder mid-IR colour (lower effective temperature of dust) corresponds to stronger and narrower photoionized bicones. This relation is in agreement with the unification model that suggests that the bi-conical NLRs are shaped by a toroidal dusty structure within a few pc from the AGN. Furthermore, we find a significant alignment between theminor axis of host galaxy discs andAGNionization cones. Together, these findings suggest that obscuration on both circumnuclear (∼pc) and galactic (∼ kpc) scales is important in shaping and orienting the AGN NLRs.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 478, no. 3 (Aug. 2018), p. 3614-3626Galáxias ativasNucleo galaticoMapeamentos astronômicosGalaxies activeGalaxies generalGalaxies SeyfertGalaxies structureMorphology of AGN emission-line regions in SDSS-IV MaNGA surveyEstrangeiroinfo: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:UFRGSTEXT001080926.pdf.txt001080926.pdf.txtExtracted Texttext/plain60276http://www.lume.ufrgs.br/bitstream/10183/184938/2/001080926.pdf.txtea19e714e2605c81e9865d1d818e0395MD52ORIGINAL001080926.pdfTexto completo (inglês)application/pdf1161255http://www.lume.ufrgs.br/bitstream/10183/184938/1/001080926.pdf8fde5f643f8f17c2bccfda81b54955fcMD5110183/1849382023-09-24 03:39:25.587508oai:www.lume.ufrgs.br:10183/184938Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-09-24T06:39:25Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Morphology of AGN emission-line regions in SDSS-IV MaNGA survey |
title |
Morphology of AGN emission-line regions in SDSS-IV MaNGA survey |
spellingShingle |
Morphology of AGN emission-line regions in SDSS-IV MaNGA survey He, Zhicheng Galáxias ativas Nucleo galatico Mapeamentos astronômicos Galaxies active Galaxies general Galaxies Seyfert Galaxies structure |
title_short |
Morphology of AGN emission-line regions in SDSS-IV MaNGA survey |
title_full |
Morphology of AGN emission-line regions in SDSS-IV MaNGA survey |
title_fullStr |
Morphology of AGN emission-line regions in SDSS-IV MaNGA survey |
title_full_unstemmed |
Morphology of AGN emission-line regions in SDSS-IV MaNGA survey |
title_sort |
Morphology of AGN emission-line regions in SDSS-IV MaNGA survey |
author |
He, Zhicheng |
author_facet |
He, Zhicheng Sun, Ai-Lei Zakamska, Nadia L. Wylezalek, Dominika Kelly, Michael Greene, Jenny E. Rembold, Sandro Barboza Riffel, Rogério Riffel, Rogemar André |
author_role |
author |
author2 |
Sun, Ai-Lei Zakamska, Nadia L. Wylezalek, Dominika Kelly, Michael Greene, Jenny E. Rembold, Sandro Barboza Riffel, Rogério Riffel, Rogemar André |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
He, Zhicheng Sun, Ai-Lei Zakamska, Nadia L. Wylezalek, Dominika Kelly, Michael Greene, Jenny E. Rembold, Sandro Barboza Riffel, Rogério Riffel, Rogemar André |
dc.subject.por.fl_str_mv |
Galáxias ativas Nucleo galatico Mapeamentos astronômicos |
topic |
Galáxias ativas Nucleo galatico Mapeamentos astronômicos Galaxies active Galaxies general Galaxies Seyfert Galaxies structure |
dc.subject.eng.fl_str_mv |
Galaxies active Galaxies general Galaxies Seyfert Galaxies structure |
description |
Extended narrow-line regions (NLRs) around active galactic nuclei (AGN) are shaped by the distribution of gas in the host galaxy and by the geometry of the circumnuclear obscuration, and thus they can be used to test the AGN unification model. In this work, we quantify the morphologies of the NLRs in 308 nearby AGN (z = 0 − 0.14, Lbol∼1042.4 − 44.1 erg s−1) from the MaNGA survey. Based on the NLR maps, we find that a large fraction (81 per cent) of these AGN have bi-conical NLR morphology. The distribution of their measured opening angles suggests that the intrinsic opening angles of the ionization cones have a mean value of 85◦–98◦ with a finite spread of 39◦–44◦ (1σ). Our inferred opening angle distribution implies a number ratio of type I to type II AGN of 1:1.6–2.3, consistent with other measurements of the type I/type II ratio at low AGN luminosities. Combining these measurements with the WISE photometry data, we find that redder mid-IR colour (lower effective temperature of dust) corresponds to stronger and narrower photoionized bicones. This relation is in agreement with the unification model that suggests that the bi-conical NLRs are shaped by a toroidal dusty structure within a few pc from the AGN. Furthermore, we find a significant alignment between theminor axis of host galaxy discs andAGNionization cones. Together, these findings suggest that obscuration on both circumnuclear (∼pc) and galactic (∼ kpc) scales is important in shaping and orienting the AGN NLRs. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-11-22T02:49:14Z |
dc.date.issued.fl_str_mv |
2018 |
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0035-8711 |
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001080926 |
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http://hdl.handle.net/10183/184938 |
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eng |
language |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly notices of the royal astronomical society. Oxford. Vol. 478, no. 3 (Aug. 2018), p. 3614-3626 |
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