Quantifying the cool ISM in radio AGNs: evidence for late-time retriggering by galaxy mergers and interactions
ABSTRACT We use deep Herschel observations of the complete 2Jy sample of powerful radio active galactic nuclei (AGNs) in the local Universe (0.05
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2022-03, Vol.512 (1), p.86-103 |
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| container_title | Monthly notices of the Royal Astronomical Society |
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| creator | Bernhard, E Tadhunter, C N Pierce, J C S Dicken, D Mullaney, J R Morganti, R Ramos Almeida, C Daddi, E |
| description | ABSTRACT
We use deep Herschel observations of the complete 2Jy sample of powerful radio active galactic nuclei (AGNs) in the local Universe (0.05 |
| doi_str_mv | 10.1093/mnras/stac474 |
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We use deep Herschel observations of the complete 2Jy sample of powerful radio active galactic nuclei (AGNs) in the local Universe (0.05 < z < 0.7) to probe their cool interstellar medium (ISM) contents and star-forming properties, comparing them against other samples of nearby luminous AGNs and quiescent galaxies. This allows us to investigate triggering and feedback mechanisms. We find that the dust masses of the strong-line radio galaxies (SLRGs) in our sample are similar to those of radio-quiet quasars, and that their median dust mass (Mdust = 2 × 107 M⊙) is enhanced by a factor of ∼200 compared to that of non-AGN ellipticals, but lower by a factor of ∼16 relative to that of local ultraluminous infrared galaxies (ULIRGs). Along with compelling evidence for merger signatures in optical images, the SLRGs in our sample also show relatively high star formation efficiencies, despite the fact that many of them fall below the main sequence for star-forming galaxies. Together, these results suggest that most of our SLRGs have been retriggered by late-time mergers that are relatively minor in terms of their gas contents. In comparison with the SLRGs, the radio AGNs with weak optical emission lines (weak-line radio galaxies – WLRGs) and edge-darkened radio jets (Fanaroff–Riley Class I radio sources – FRIs) have both lower cool ISM masses and star formation rates (by a factor of >30), consistent with being fuelled by a different mechanism (e.g. the direct accretion of hot gas).</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stac474</identifier><language>eng</language><publisher>Oxford University Press</publisher><subject>Sciences of the Universe</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2022-03, Vol.512 (1), p.86-103</ispartof><rights>2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society 2022</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c344t-b4e23d1211d4609fc33e4cf35cb564f6f764093d13be727d4df5ace31b3bf7a13</citedby><cites>FETCH-LOGICAL-c344t-b4e23d1211d4609fc33e4cf35cb564f6f764093d13be727d4df5ace31b3bf7a13</cites><orcidid>0000-0002-9482-6844 ; 0000-0001-9227-7346 ; 0000-0001-8353-649X ; 0000-0002-3331-9590 ; 0000-0003-0589-5969</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,1604,27924,27925</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/mnras/stac474$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc><backlink>$$Uhttps://insu.hal.science/insu-03744498$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Bernhard, E</creatorcontrib><creatorcontrib>Tadhunter, C N</creatorcontrib><creatorcontrib>Pierce, J C S</creatorcontrib><creatorcontrib>Dicken, D</creatorcontrib><creatorcontrib>Mullaney, J R</creatorcontrib><creatorcontrib>Morganti, R</creatorcontrib><creatorcontrib>Ramos Almeida, C</creatorcontrib><creatorcontrib>Daddi, E</creatorcontrib><title>Quantifying the cool ISM in radio AGNs: evidence for late-time retriggering by galaxy mergers and interactions</title><title>Monthly notices of the Royal Astronomical Society</title><description>ABSTRACT
We use deep Herschel observations of the complete 2Jy sample of powerful radio active galactic nuclei (AGNs) in the local Universe (0.05 < z < 0.7) to probe their cool interstellar medium (ISM) contents and star-forming properties, comparing them against other samples of nearby luminous AGNs and quiescent galaxies. This allows us to investigate triggering and feedback mechanisms. We find that the dust masses of the strong-line radio galaxies (SLRGs) in our sample are similar to those of radio-quiet quasars, and that their median dust mass (Mdust = 2 × 107 M⊙) is enhanced by a factor of ∼200 compared to that of non-AGN ellipticals, but lower by a factor of ∼16 relative to that of local ultraluminous infrared galaxies (ULIRGs). Along with compelling evidence for merger signatures in optical images, the SLRGs in our sample also show relatively high star formation efficiencies, despite the fact that many of them fall below the main sequence for star-forming galaxies. Together, these results suggest that most of our SLRGs have been retriggered by late-time mergers that are relatively minor in terms of their gas contents. In comparison with the SLRGs, the radio AGNs with weak optical emission lines (weak-line radio galaxies – WLRGs) and edge-darkened radio jets (Fanaroff–Riley Class I radio sources – FRIs) have both lower cool ISM masses and star formation rates (by a factor of >30), consistent with being fuelled by a different mechanism (e.g. the direct accretion of hot gas).</description><subject>Sciences of the Universe</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNqFkM9LwzAYhoMoOKdH7zmKUJc0abp6G6LbYCqinkOaH12kTUaSDfvf27nh1dMHL8_7wvcAcI3RHUYVmXQuiDiJSUha0hMwwoQVWV4xdgpGCJEim5YYn4OLGL8QQpTkbATc21a4ZE1vXQPTWkPpfQuX78_QOhiEsh7O5i_xHuqdVdpJDY0PsBVJZ8l2Ggadgm0aHfb9uoeNaMV3DzsdhixC4dQwlHQQMlnv4iU4M6KN-up4x-Dz6fHjYZGtXufLh9kqk4TSlNVU50ThHGNFGaqMJERTaUgh64JRw0zJ6PCxwqTWZV4qqkwhpCa4JrUpBSZjcHvYXYuWb4LtROi5F5YvZituXdxyREpKaTXd7eHsAMvgYwza_DUw4nuz_NcsP5od-JsD77ebf9AfKD19Ww</recordid><startdate>20220312</startdate><enddate>20220312</enddate><creator>Bernhard, E</creator><creator>Tadhunter, C N</creator><creator>Pierce, J C S</creator><creator>Dicken, D</creator><creator>Mullaney, J R</creator><creator>Morganti, R</creator><creator>Ramos Almeida, C</creator><creator>Daddi, E</creator><general>Oxford University Press</general><general>Oxford University Press (OUP): Policy P - Oxford Open Option A</general><scope>AAYXX</scope><scope>CITATION</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0002-9482-6844</orcidid><orcidid>https://orcid.org/0000-0001-9227-7346</orcidid><orcidid>https://orcid.org/0000-0001-8353-649X</orcidid><orcidid>https://orcid.org/0000-0002-3331-9590</orcidid><orcidid>https://orcid.org/0000-0003-0589-5969</orcidid></search><sort><creationdate>20220312</creationdate><title>Quantifying the cool ISM in radio AGNs: evidence for late-time retriggering by galaxy mergers and interactions</title><author>Bernhard, E ; Tadhunter, C N ; Pierce, J C S ; Dicken, D ; Mullaney, J R ; Morganti, R ; Ramos Almeida, C ; Daddi, E</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c344t-b4e23d1211d4609fc33e4cf35cb564f6f764093d13be727d4df5ace31b3bf7a13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Sciences of the Universe</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bernhard, E</creatorcontrib><creatorcontrib>Tadhunter, C N</creatorcontrib><creatorcontrib>Pierce, J C S</creatorcontrib><creatorcontrib>Dicken, D</creatorcontrib><creatorcontrib>Mullaney, J R</creatorcontrib><creatorcontrib>Morganti, R</creatorcontrib><creatorcontrib>Ramos Almeida, C</creatorcontrib><creatorcontrib>Daddi, E</creatorcontrib><collection>CrossRef</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Bernhard, E</au><au>Tadhunter, C N</au><au>Pierce, J C S</au><au>Dicken, D</au><au>Mullaney, J R</au><au>Morganti, R</au><au>Ramos Almeida, C</au><au>Daddi, E</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Quantifying the cool ISM in radio AGNs: evidence for late-time retriggering by galaxy mergers and interactions</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2022-03-12</date><risdate>2022</risdate><volume>512</volume><issue>1</issue><spage>86</spage><epage>103</epage><pages>86-103</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>ABSTRACT
We use deep Herschel observations of the complete 2Jy sample of powerful radio active galactic nuclei (AGNs) in the local Universe (0.05 < z < 0.7) to probe their cool interstellar medium (ISM) contents and star-forming properties, comparing them against other samples of nearby luminous AGNs and quiescent galaxies. This allows us to investigate triggering and feedback mechanisms. We find that the dust masses of the strong-line radio galaxies (SLRGs) in our sample are similar to those of radio-quiet quasars, and that their median dust mass (Mdust = 2 × 107 M⊙) is enhanced by a factor of ∼200 compared to that of non-AGN ellipticals, but lower by a factor of ∼16 relative to that of local ultraluminous infrared galaxies (ULIRGs). Along with compelling evidence for merger signatures in optical images, the SLRGs in our sample also show relatively high star formation efficiencies, despite the fact that many of them fall below the main sequence for star-forming galaxies. Together, these results suggest that most of our SLRGs have been retriggered by late-time mergers that are relatively minor in terms of their gas contents. In comparison with the SLRGs, the radio AGNs with weak optical emission lines (weak-line radio galaxies – WLRGs) and edge-darkened radio jets (Fanaroff–Riley Class I radio sources – FRIs) have both lower cool ISM masses and star formation rates (by a factor of >30), consistent with being fuelled by a different mechanism (e.g. the direct accretion of hot gas).</abstract><pub>Oxford University Press</pub><doi>10.1093/mnras/stac474</doi><tpages>18</tpages><orcidid>https://orcid.org/0000-0002-9482-6844</orcidid><orcidid>https://orcid.org/0000-0001-9227-7346</orcidid><orcidid>https://orcid.org/0000-0001-8353-649X</orcidid><orcidid>https://orcid.org/0000-0002-3331-9590</orcidid><orcidid>https://orcid.org/0000-0003-0589-5969</orcidid><oa>free_for_read</oa></addata></record> |
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| title | Quantifying the cool ISM in radio AGNs: evidence for late-time retriggering by galaxy mergers and interactions |
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