Interactions between large-scale radio structures and gas in a sample of optically selected type 2 quasars
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/239471 |
Resumo: | Context. The role of radio mode feedback in non radio-loud quasars needs to be explored in depth to determine its true importance. Its effects can be identified based on the evidence of interactions between the radio structures and the ambient ionised gas. Aims. We investigate this interaction in a sample of 13 optically selected type 2 quasars (QSO2) at z < 0.2 with the Very Large Array (VLA) FIRST Survey radio detections, none of which are radio-loud. The ranges of [OIII]λ5007 and monochromatic radio luminosities are log(L[OIII]/erg s−1 ) ∼ 42.08–42.79 and log(P1.4 GHz/erg s−1 Hz−1 ) ∼ 30.08−31.76. All of them show complex optical morphologies, with signs of distortion across tens of kpc due to mergers and interactions. Methods. We searched for evidence of interactions between the radio structures and the ionised gas by characterising and comparing their morphologies. The former was traced by narrow band Hα images obtained with the GTC 10.4 m Spanish telescope and the Osiris instrument. The latter is traced by VLA radio maps obtained with A and B configurations to achieve both high resolution and brightness sensitivity. Results. The radio luminosity has an active galatic nucleus (AGN) component in 11 our of 13 QSO2, which is spatially extended in our radio data in 9 of them (jets, lobes, or other). The relative contribution of the extended radio emission to the total P1.4 GHz is in most cases in the range from 30% to 90%. The maximum sizes are in the range of d R max of around a few to 500 kpc. The QSO2 undergoing interaction or merger events appear to be invariably associated with ionised gas spread over large spatial scales with maximum distances from the AGN in the range rmax ∼ 12−90 kpc. The morphology of the ionised gas at <30 kpc is strongly influenced by AGN related processes. Evidence for radio-gas interactions exist in 10 out of 13 QSO2; that is, in all but one with confirmed AGN radio components. The interactions are identified across different spatial scales, from the nuclear narrow line region up to tens of kpc. Conclusions. Although this sample cannot be considered representative of the general population of QSO2, it supports the idea that large-scale low to modest power radio sources can exist in radio-quiet QSO2, which can provide a source of feedback on scales of the spheroidal component of galaxies and well into the circumgalactic medium, in systems where radiative mode feedback is expected to dominate. |
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Villar-Martín, MontseEmonts, BjornCabrera-Lavers, AntonioBellocchi, EnricaAlonso-Herrero, AlmudenaHumphrey, AlistairOliveira, Bruno Dall'Agnol deStorchi-Bergmann, Thaisa2022-05-31T01:00:34Z20210004-6361http://hdl.handle.net/10183/239471001139665Context. The role of radio mode feedback in non radio-loud quasars needs to be explored in depth to determine its true importance. Its effects can be identified based on the evidence of interactions between the radio structures and the ambient ionised gas. Aims. We investigate this interaction in a sample of 13 optically selected type 2 quasars (QSO2) at z < 0.2 with the Very Large Array (VLA) FIRST Survey radio detections, none of which are radio-loud. The ranges of [OIII]λ5007 and monochromatic radio luminosities are log(L[OIII]/erg s−1 ) ∼ 42.08–42.79 and log(P1.4 GHz/erg s−1 Hz−1 ) ∼ 30.08−31.76. All of them show complex optical morphologies, with signs of distortion across tens of kpc due to mergers and interactions. Methods. We searched for evidence of interactions between the radio structures and the ionised gas by characterising and comparing their morphologies. The former was traced by narrow band Hα images obtained with the GTC 10.4 m Spanish telescope and the Osiris instrument. The latter is traced by VLA radio maps obtained with A and B configurations to achieve both high resolution and brightness sensitivity. Results. The radio luminosity has an active galatic nucleus (AGN) component in 11 our of 13 QSO2, which is spatially extended in our radio data in 9 of them (jets, lobes, or other). The relative contribution of the extended radio emission to the total P1.4 GHz is in most cases in the range from 30% to 90%. The maximum sizes are in the range of d R max of around a few to 500 kpc. The QSO2 undergoing interaction or merger events appear to be invariably associated with ionised gas spread over large spatial scales with maximum distances from the AGN in the range rmax ∼ 12−90 kpc. The morphology of the ionised gas at <30 kpc is strongly influenced by AGN related processes. Evidence for radio-gas interactions exist in 10 out of 13 QSO2; that is, in all but one with confirmed AGN radio components. The interactions are identified across different spatial scales, from the nuclear narrow line region up to tens of kpc. Conclusions. Although this sample cannot be considered representative of the general population of QSO2, it supports the idea that large-scale low to modest power radio sources can exist in radio-quiet QSO2, which can provide a source of feedback on scales of the spheroidal component of galaxies and well into the circumgalactic medium, in systems where radiative mode feedback is expected to dominate.application/pdfengAstronomy and astrophysics. Les Ulis. Vol. 650 (June 2021), A84, 31 p.Galáxias ativasQuasarsEvolucao galaticaQuasars : GeneralGalaxies : ActiveGalaxies : JetsGalaxies : EvolutionInteractions between large-scale radio structures and gas in a sample of optically selected type 2 quasarsEstrangeiroinfo: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:UFRGSTEXT001139665.pdf.txt001139665.pdf.txtExtracted Texttext/plain144845http://www.lume.ufrgs.br/bitstream/10183/239471/2/001139665.pdf.txt00690a298cacf2453e871c00bc033fb0MD52ORIGINAL001139665.pdfTexto completo (inglês)application/pdf10804124http://www.lume.ufrgs.br/bitstream/10183/239471/1/001139665.pdfce161cc0706936bf904e57f1a07b800dMD5110183/2394712022-06-03 04:34:01.316178oai:www.lume.ufrgs.br:10183/239471Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2022-06-03T07:34:01Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Interactions between large-scale radio structures and gas in a sample of optically selected type 2 quasars |
title |
Interactions between large-scale radio structures and gas in a sample of optically selected type 2 quasars |
spellingShingle |
Interactions between large-scale radio structures and gas in a sample of optically selected type 2 quasars Villar-Martín, Montse Galáxias ativas Quasars Evolucao galatica Quasars : General Galaxies : Active Galaxies : Jets Galaxies : Evolution |
title_short |
Interactions between large-scale radio structures and gas in a sample of optically selected type 2 quasars |
title_full |
Interactions between large-scale radio structures and gas in a sample of optically selected type 2 quasars |
title_fullStr |
Interactions between large-scale radio structures and gas in a sample of optically selected type 2 quasars |
title_full_unstemmed |
Interactions between large-scale radio structures and gas in a sample of optically selected type 2 quasars |
title_sort |
Interactions between large-scale radio structures and gas in a sample of optically selected type 2 quasars |
author |
Villar-Martín, Montse |
author_facet |
Villar-Martín, Montse Emonts, Bjorn Cabrera-Lavers, Antonio Bellocchi, Enrica Alonso-Herrero, Almudena Humphrey, Alistair Oliveira, Bruno Dall'Agnol de Storchi-Bergmann, Thaisa |
author_role |
author |
author2 |
Emonts, Bjorn Cabrera-Lavers, Antonio Bellocchi, Enrica Alonso-Herrero, Almudena Humphrey, Alistair Oliveira, Bruno Dall'Agnol de Storchi-Bergmann, Thaisa |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Villar-Martín, Montse Emonts, Bjorn Cabrera-Lavers, Antonio Bellocchi, Enrica Alonso-Herrero, Almudena Humphrey, Alistair Oliveira, Bruno Dall'Agnol de Storchi-Bergmann, Thaisa |
dc.subject.por.fl_str_mv |
Galáxias ativas Quasars Evolucao galatica |
topic |
Galáxias ativas Quasars Evolucao galatica Quasars : General Galaxies : Active Galaxies : Jets Galaxies : Evolution |
dc.subject.eng.fl_str_mv |
Quasars : General Galaxies : Active Galaxies : Jets Galaxies : Evolution |
description |
Context. The role of radio mode feedback in non radio-loud quasars needs to be explored in depth to determine its true importance. Its effects can be identified based on the evidence of interactions between the radio structures and the ambient ionised gas. Aims. We investigate this interaction in a sample of 13 optically selected type 2 quasars (QSO2) at z < 0.2 with the Very Large Array (VLA) FIRST Survey radio detections, none of which are radio-loud. The ranges of [OIII]λ5007 and monochromatic radio luminosities are log(L[OIII]/erg s−1 ) ∼ 42.08–42.79 and log(P1.4 GHz/erg s−1 Hz−1 ) ∼ 30.08−31.76. All of them show complex optical morphologies, with signs of distortion across tens of kpc due to mergers and interactions. Methods. We searched for evidence of interactions between the radio structures and the ionised gas by characterising and comparing their morphologies. The former was traced by narrow band Hα images obtained with the GTC 10.4 m Spanish telescope and the Osiris instrument. The latter is traced by VLA radio maps obtained with A and B configurations to achieve both high resolution and brightness sensitivity. Results. The radio luminosity has an active galatic nucleus (AGN) component in 11 our of 13 QSO2, which is spatially extended in our radio data in 9 of them (jets, lobes, or other). The relative contribution of the extended radio emission to the total P1.4 GHz is in most cases in the range from 30% to 90%. The maximum sizes are in the range of d R max of around a few to 500 kpc. The QSO2 undergoing interaction or merger events appear to be invariably associated with ionised gas spread over large spatial scales with maximum distances from the AGN in the range rmax ∼ 12−90 kpc. The morphology of the ionised gas at <30 kpc is strongly influenced by AGN related processes. Evidence for radio-gas interactions exist in 10 out of 13 QSO2; that is, in all but one with confirmed AGN radio components. The interactions are identified across different spatial scales, from the nuclear narrow line region up to tens of kpc. Conclusions. Although this sample cannot be considered representative of the general population of QSO2, it supports the idea that large-scale low to modest power radio sources can exist in radio-quiet QSO2, which can provide a source of feedback on scales of the spheroidal component of galaxies and well into the circumgalactic medium, in systems where radiative mode feedback is expected to dominate. |
publishDate |
2021 |
dc.date.issued.fl_str_mv |
2021 |
dc.date.accessioned.fl_str_mv |
2022-05-31T01:00:34Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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http://hdl.handle.net/10183/239471 |
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0004-6361 |
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001139665 |
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0004-6361 001139665 |
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http://hdl.handle.net/10183/239471 |
dc.language.iso.fl_str_mv |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. Les Ulis. Vol. 650 (June 2021), A84, 31 p. |
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