Studying the relationship between X-ray emission and accretion in AGN using the XMM–Newton Bright Serendipitous Survey

We study the link between the X-ray emission in radio-quiet active galactic nuclei (AGN) and the accretion rate on the central supermassive black hole using a statistically well-defined and representative sample of 71 type 1 AGN extracted from the XMM–Newton Bright Serendipitous Survey. We search an...

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Autores: Fanali, Rossella, Caccianiga, Alessandro, Severgnini, Paola, Della Ceca, Roberto, Marchese, Elena, Carrera Troyano, Francisco Jesús|||0000-0003-2135-9023, Corral Ramos, Amalia|||0000-0001-8849-185X, Mateos Ibáñez, Silvia|||0000-0002-1375-2389
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/4086
Acceso en línea:http://hdl.handle.net/10902/4086
Access Level:acceso abierto
Palabra clave:Galaxies: active
Galaxies: nuclei
Quasars: general
X-rays: galaxies
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spelling Studying the relationship between X-ray emission and accretion in AGN using the XMM–Newton Bright Serendipitous SurveyErratum: Studying the relationship between X-ray emission and accretion in AGNs using theXMM–Newton Bright Serendipitous SurveyFanali, RossellaCaccianiga, AlessandroSevergnini, PaolaDella Ceca, RobertoMarchese, ElenaCarrera Troyano, Francisco Jesús|||0000-0003-2135-9023Corral Ramos, Amalia|||0000-0001-8849-185XMateos Ibáñez, Silvia|||0000-0002-1375-2389Galaxies: activeGalaxies: nucleiQuasars: generalX-rays: galaxiesWe study the link between the X-ray emission in radio-quiet active galactic nuclei (AGN) and the accretion rate on the central supermassive black hole using a statistically well-defined and representative sample of 71 type 1 AGN extracted from the XMM–Newton Bright Serendipitous Survey. We search and quantify the statistical correlations between some fundamental parameters that characterize the X-ray emission, i.e. the X-ray spectral slope, Γ, and the X-ray ‘loudness’, and the accretion rate, both absolute (Ṁ) and normalized to the Eddington luminosity (Eddington ratio, λ). We parametrize the X-ray loudness using three different quantities: the bolometric correction Kbol, the two-point spectral index αOX and the disc/corona luminosity ratio. We find that the X-ray spectral index depends on the normalized accretion rate while the ‘X-ray loudness’ depends on both the normalized and the absolute accretion rate. The dependence on the Eddington ratio, in particular, is probably induced by the Γ – λ correlation. The two proxies usually adopted in the literature to quantify the X-ray loudness of an AGN, i.e. Kbol and αOX, behave differently, with Kbol being more sensitive to the Eddington ratio and αOX having a stronger dependence with the absolute accretion. The explanation of this result is likely related to the different sensitivity of the two parameters to the X-ray spectral index.We thank the referee for useful comments that improved the paper. We acknowledge Massimo Dotti, Francesco Haardt, Monica Colpi and Valentina Braito for useful discussions and Laura Maraschi and Tommaso Maccacaro for the precious comments. The authors acknowledge financial support from ASI (grant n. I/088/06/0), from the Italian Ministry of Education, Universities and Research (PRIN2010-2011, grant n. 2010NHBSBE) and from the Spanish Ministry of Economy and Competitiveness through grant AYA2012-31447.We thank the referee for useful comments that improved the paper. We acknowledge Massimo Dotti, Francesco Haardt, Monica Colpi and Valentina Braito for useful discussions and Laura Maraschi and Tommaso Maccacaro for the precious comments. The authors acknowledge financial support from ASI (grant n. I/088/06/0), from the Italian Ministry of Education, Universities and Research (PRIN2010-2011, grant n. 2010NHBSBE) and from the Spanish Ministry of Economy and Competitiveness through grant AYA2012-31447.Royal Astronomical SocietyUniversidad de Cantabria20132013-01-01journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/4086Monthly Notices of the Royal Astronomical Society, 2013, 433(1), 648-658 - (ERRATUM), 2013, 435(1), 900reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/40862026-06-02T12:39:31Z
dc.title.none.fl_str_mv Studying the relationship between X-ray emission and accretion in AGN using the XMM–Newton Bright Serendipitous Survey
Erratum: Studying the relationship between X-ray emission and accretion in AGNs using theXMM–Newton Bright Serendipitous Survey
title Studying the relationship between X-ray emission and accretion in AGN using the XMM–Newton Bright Serendipitous Survey
spellingShingle Studying the relationship between X-ray emission and accretion in AGN using the XMM–Newton Bright Serendipitous Survey
Fanali, Rossella
Galaxies: active
Galaxies: nuclei
Quasars: general
X-rays: galaxies
title_short Studying the relationship between X-ray emission and accretion in AGN using the XMM–Newton Bright Serendipitous Survey
title_full Studying the relationship between X-ray emission and accretion in AGN using the XMM–Newton Bright Serendipitous Survey
title_fullStr Studying the relationship between X-ray emission and accretion in AGN using the XMM–Newton Bright Serendipitous Survey
title_full_unstemmed Studying the relationship between X-ray emission and accretion in AGN using the XMM–Newton Bright Serendipitous Survey
title_sort Studying the relationship between X-ray emission and accretion in AGN using the XMM–Newton Bright Serendipitous Survey
dc.creator.none.fl_str_mv Fanali, Rossella
Caccianiga, Alessandro
Severgnini, Paola
Della Ceca, Roberto
Marchese, Elena
Carrera Troyano, Francisco Jesús|||0000-0003-2135-9023
Corral Ramos, Amalia|||0000-0001-8849-185X
Mateos Ibáñez, Silvia|||0000-0002-1375-2389
author Fanali, Rossella
author_facet Fanali, Rossella
Caccianiga, Alessandro
Severgnini, Paola
Della Ceca, Roberto
Marchese, Elena
Carrera Troyano, Francisco Jesús|||0000-0003-2135-9023
Corral Ramos, Amalia|||0000-0001-8849-185X
Mateos Ibáñez, Silvia|||0000-0002-1375-2389
author_role author
author2 Caccianiga, Alessandro
Severgnini, Paola
Della Ceca, Roberto
Marchese, Elena
Carrera Troyano, Francisco Jesús|||0000-0003-2135-9023
Corral Ramos, Amalia|||0000-0001-8849-185X
Mateos Ibáñez, Silvia|||0000-0002-1375-2389
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv Galaxies: active
Galaxies: nuclei
Quasars: general
X-rays: galaxies
topic Galaxies: active
Galaxies: nuclei
Quasars: general
X-rays: galaxies
description We study the link between the X-ray emission in radio-quiet active galactic nuclei (AGN) and the accretion rate on the central supermassive black hole using a statistically well-defined and representative sample of 71 type 1 AGN extracted from the XMM–Newton Bright Serendipitous Survey. We search and quantify the statistical correlations between some fundamental parameters that characterize the X-ray emission, i.e. the X-ray spectral slope, Γ, and the X-ray ‘loudness’, and the accretion rate, both absolute (Ṁ) and normalized to the Eddington luminosity (Eddington ratio, λ). We parametrize the X-ray loudness using three different quantities: the bolometric correction Kbol, the two-point spectral index αOX and the disc/corona luminosity ratio. We find that the X-ray spectral index depends on the normalized accretion rate while the ‘X-ray loudness’ depends on both the normalized and the absolute accretion rate. The dependence on the Eddington ratio, in particular, is probably induced by the Γ – λ correlation. The two proxies usually adopted in the literature to quantify the X-ray loudness of an AGN, i.e. Kbol and αOX, behave differently, with Kbol being more sensitive to the Eddington ratio and αOX having a stronger dependence with the absolute accretion. The explanation of this result is likely related to the different sensitivity of the two parameters to the X-ray spectral index.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10902/4086
url http://hdl.handle.net/10902/4086
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Royal Astronomical Society
publisher.none.fl_str_mv Royal Astronomical Society
dc.source.none.fl_str_mv Monthly Notices of the Royal Astronomical Society, 2013, 433(1), 648-658 - (ERRATUM), 2013, 435(1), 900
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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