Low-ionization outflows in high Eddington ratio quasars
The broad Mg II λ2800 doublet has been frequently studied in connection with its potentially important role as a virial estimator of black hole mass in high-redshift quasars. An important task, therefore, is the identification of any line components that are likely related to broadening by non-viria...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2013 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/407855 |
| Acceso en línea: | http://hdl.handle.net/10261/407855 |
| Access Level: | acceso abierto |
| Palabra clave: | Quasars: emission lines Quasars: general |
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Low-ionization outflows in high Eddington ratio quasarsMarziani, PaolaSulentic, Jack W.Plauchu-Frayn, I.Olmo, Ascensión delQuasars: emission linesQuasars: generalThe broad Mg II λ2800 doublet has been frequently studied in connection with its potentially important role as a virial estimator of black hole mass in high-redshift quasars. An important task, therefore, is the identification of any line components that are likely related to broadening by non-virial motions. High signal-to-noise median composite spectra (binned in the "four-dimensional eigenvector 1" context of Sulentic et al.) were constructed for the brightest 680 Sloan Digital Sky Survey Data Release 7 quasars in the 0.4 ≤ z ≤ 0.75 range where both Mg II λ2800 and Hβ are recorded in the same spectra. Composite spectra representing 90% of the quasars confirm previous findings that FWHM(Mg II λ2800) is about 20% narrower than FWHM(Hβ). The situation is clearly different for the most extreme (Population A) sources, which are the highest Eddington radiators in the sample. In the median spectra of these sources, FWHM Mg II λ2800 is equal to or greater than FWHM(Hβ) and shows a significant blueshift relative to Hβ. We interpret the Mg II λ2800 blueshift as the signature of a radiation-driven wind or outflow in the highest accreting quasars. In this interpretation, the Mg II λ2800 line width - affected by blueshifted emission - is unsuitable for virial mass estimation in ≈10% of quasars. © 2013. The American Astronomical Society. All rights reserved.P.M. acknowledges Junta de Andaluc´ıa, through grant TIC- 114 and the Excellence Project P08-TIC-3531, and the Spanish Ministry for Science and Innovation through grants AYA2010- 15169 for supporting a sabbatical stay at IAA-CSIC. I.P.-F. acknowledges the postdoctoral fellowship grants 145727 and 170304 from CONACyT Mexico, and AdO the Junta de Andaluc´ıa TIC114 and Excellence Project P08-TIC-3531, and Spanish Research project AYA2010-15169. The authors thank an anonymous referee whose suggestions helped them to criti- cally reanalyze some of their results. Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the U.S. Department of Energy, the National Aeronau- tics and Space Administration, the Japanese Monbuka- gakusho, the Max Planck Society, and the Higher Education Funding Council for England. The SDSS Web Site is http://www.sdss.org/. Full acknowledgement of SDSS is given at http://www.sdss.org/collaboration/credits.html.Peer reviewedIOP PublishingJunta de AndalucíaMinisterio de Ciencia e Innovación (España)Consejo Nacional de Ciencia y Tecnología (México)Alfred P. Sloan FoundationNASANational Science Foundation (US)Japanese GovernmentMax Planck SocietyHigher Education Funding Council for EnglandConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2025202520132025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/407855reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MICINN//AYA2010-15169http://dx.doi.org/10.1088/0004-637X/764/2/150Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4078552026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Low-ionization outflows in high Eddington ratio quasars |
| title |
Low-ionization outflows in high Eddington ratio quasars |
| spellingShingle |
Low-ionization outflows in high Eddington ratio quasars Marziani, Paola Quasars: emission lines Quasars: general |
| title_short |
Low-ionization outflows in high Eddington ratio quasars |
| title_full |
Low-ionization outflows in high Eddington ratio quasars |
| title_fullStr |
Low-ionization outflows in high Eddington ratio quasars |
| title_full_unstemmed |
Low-ionization outflows in high Eddington ratio quasars |
| title_sort |
Low-ionization outflows in high Eddington ratio quasars |
| dc.creator.none.fl_str_mv |
Marziani, Paola Sulentic, Jack W. Plauchu-Frayn, I. Olmo, Ascensión del |
| author |
Marziani, Paola |
| author_facet |
Marziani, Paola Sulentic, Jack W. Plauchu-Frayn, I. Olmo, Ascensión del |
| author_role |
author |
| author2 |
Sulentic, Jack W. Plauchu-Frayn, I. Olmo, Ascensión del |
| author2_role |
author author author |
| dc.contributor.none.fl_str_mv |
Junta de Andalucía Ministerio de Ciencia e Innovación (España) Consejo Nacional de Ciencia y Tecnología (México) Alfred P. Sloan Foundation NASA National Science Foundation (US) Japanese Government Max Planck Society Higher Education Funding Council for England Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Quasars: emission lines Quasars: general |
| topic |
Quasars: emission lines Quasars: general |
| description |
The broad Mg II λ2800 doublet has been frequently studied in connection with its potentially important role as a virial estimator of black hole mass in high-redshift quasars. An important task, therefore, is the identification of any line components that are likely related to broadening by non-virial motions. High signal-to-noise median composite spectra (binned in the "four-dimensional eigenvector 1" context of Sulentic et al.) were constructed for the brightest 680 Sloan Digital Sky Survey Data Release 7 quasars in the 0.4 ≤ z ≤ 0.75 range where both Mg II λ2800 and Hβ are recorded in the same spectra. Composite spectra representing 90% of the quasars confirm previous findings that FWHM(Mg II λ2800) is about 20% narrower than FWHM(Hβ). The situation is clearly different for the most extreme (Population A) sources, which are the highest Eddington radiators in the sample. In the median spectra of these sources, FWHM Mg II λ2800 is equal to or greater than FWHM(Hβ) and shows a significant blueshift relative to Hβ. We interpret the Mg II λ2800 blueshift as the signature of a radiation-driven wind or outflow in the highest accreting quasars. In this interpretation, the Mg II λ2800 line width - affected by blueshifted emission - is unsuitable for virial mass estimation in ≈10% of quasars. © 2013. The American Astronomical Society. All rights reserved. |
| publishDate |
2013 |
| dc.date.none.fl_str_mv |
2013 2025 2025 2025 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Postprint info:eu-repo/semantics/acceptedVersion |
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article |
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acceptedVersion |
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http://hdl.handle.net/10261/407855 |
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http://hdl.handle.net/10261/407855 |
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Inglés |
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Inglés |
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#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MICINN//AYA2010-15169 http://dx.doi.org/10.1088/0004-637X/764/2/150 Sí |
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info:eu-repo/semantics/openAccess |
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openAccess |
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IOP Publishing |
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IOP Publishing |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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