AustralieFrV1, PascalFrancis, Checkpoint, bibRecord, 001474

X-ray and radio variability in the low-luminosity active galactic nucleus NGC 7213

Identifieur interne : 001474 ( PascalFrancis/Checkpoint ); précédent : 001473; suivant : 001475

X-ray and radio variability in the low-luminosity active galactic nucleus NGC 7213

Auteurs : M. E. Bell [Royaume-Uni] ; T. Tzioumis [Australie] ; P. Uttley [Royaume-Uni] ; R. P. Fender [Royaume-Uni] ; P. Arevalo [Allemagne, Chili] ; E. Breedt [Royaume-Uni] ; I. Mchardy [Royaume-Uni] ; D. E. Calvelo [Royaume-Uni] ; O. Jamil [Royaume-Uni] ; E. Körding [France]

Source :

Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2011.

RBID : Pascal:11-0081189

Descripteurs français

Pascal (Inist)
- Variabilité, Luminosité, Noyau galactique actif, Trou noir, Binaire RX, Source RX binaire, Corrélation croisée, Courbe lumière, Fonction corrélation, Observation RX, Variation temporelle, Disque accrétion, Galaxies actives, Noyau galaxies, Cosmologie, Source RX cosmique.
Wicri :
- topic : Cosmologie.

English descriptors

KwdEn :
- Accretion disks, Active galaxies, Active galaxy nuclei, Binary X ray source, Black holes, Correlation functions, Cosmic x-ray sources, Cosmology, Cross correlations, Galaxy nuclei, Light curves, Luminosity, Time variation, Variability, X ray observation, X-ray binary stars.

Abstract

We present the results of a ˜3 yr campaign to monitor the low-luminosity active galactic nucleus (LLAGN) NGC 7213 in the radio (4.8 and 8.4 GHz) and X-ray bands (2-10 keV). With a reported X-ray Eddington ratio of 7 x 10^-4L_Edd, NGC 7213 can be considered to be comparable to a hard-state black hole X-ray binary. We show that a weak correlation exists between the X-ray and radio light curves. We use the cross-correlation function to calculate a global time-lag between events in the X-ray and radio bands to be 24 ± 12 d lag (8.4 GHz radio lagging X-ray) and 40 ± 13 d lag (4.8 GHz radio lagging X-ray), respectively. The radio-radio light curves are extremely well correlated with a lag of 20.5 ± 12.9 d (4.8 GHz lagging 8.4 GHz). We explore the previously established scaling relationship between core radio and X-ray luminosities and black hole mass L_R W^0.6-0.8L^0.6_X, known as the 'Fundamental Plane of black hole activity', and show that NGC 7213 lies very close to the best-fitting 'global' correlation for the plane as one of the most-luminous LLAGNs. With a large number of quasi-simultaneous radio and X-ray observations, we explore for the first time the variations of a single AGN with respect to the Fundamental Plane. Although the average radio and X-ray luminosities for NGC 7213 are in good agreement with the Plane, we show that there is intrinsic scatter with respect to the Plane for the individual data points.

Affiliations:

Allemagne, Australie, Chili, France, Royaume-Uni

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 002046
to stream PascalFrancis, to step Curation: 003E81

Links to Exploration step

Pascal:11-0081189

Le document en format XML

<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">X-ray and radio variability in the low-luminosity active galactic nucleus NGC 7213</title>
<author><name sortKey="Bell, M E" sort="Bell, M E" uniqKey="Bell M" first="M. E." last="Bell">M. E. Bell</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Tzioumis, T" sort="Tzioumis, T" uniqKey="Tzioumis T" first="T." last="Tzioumis">T. Tzioumis</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Australia Telescope National Facility, CSIRO</s1>
<s2>Marsfield, NSW 2122</s2>
<s3>AUS</s3>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>Australie</country>
<wicri:noRegion>Marsfield, NSW 2122</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Uttley, P" sort="Uttley, P" uniqKey="Uttley P" first="P." last="Uttley">P. Uttley</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Fender, R P" sort="Fender, R P" uniqKey="Fender R" first="R. P." last="Fender">R. P. Fender</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Arevalo, P" sort="Arevalo, P" uniqKey="Arevalo P" first="P." last="Arevalo">P. Arevalo</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Strasse 1</s1>
<s2>85741 Garching</s2>
<s3>DEU</s3>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>Allemagne</country>
<wicri:noRegion>85741 Garching</wicri:noRegion>
<wicri:noRegion>Karl-Schwarzschild-Strasse 1</wicri:noRegion>
<wicri:noRegion>85741 Garching</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Departamento de Ciencias Fisicas, Universidad Andres Bello, Av. Republica 252</s1>
<s2>Santiago</s2>
<s3>CHL</s3>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>Chili</country>
<wicri:noRegion>Santiago</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Breedt, E" sort="Breedt, E" uniqKey="Breedt E" first="E." last="Breedt">E. Breedt</name>
<affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Department of Physics, University of Warwick, Gibbet Hill Road</s1>
<s2>Coventry CV4 7AL</s2>
<s3>GBR</s3>
<sZ>6 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Coventry CV4 7AL</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Mchardy, I" sort="Mchardy, I" uniqKey="Mchardy I" first="I." last="Mchardy">I. Mchardy</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Calvelo, D E" sort="Calvelo, D E" uniqKey="Calvelo D" first="D. E." last="Calvelo">D. E. Calvelo</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Jamil, O" sort="Jamil, O" uniqKey="Jamil O" first="O." last="Jamil">O. Jamil</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Kording, E" sort="Kording, E" uniqKey="Kording E" first="E." last="Körding">E. Körding</name>
<affiliation wicri:level="1"><inist:fA14 i1="06"><s1>AIM/CEA Saclay and University Paris Diderot, l'Orme des Merisers</s1>
<s2>91219 Gif-sur-vette</s2>
<s3>FRA</s3>
<sZ>10 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>91219 Gif-sur-vette</wicri:noRegion>
<wicri:noRegion>l'Orme des Merisers</wicri:noRegion>
<wicri:noRegion>91219 Gif-sur-vette</wicri:noRegion>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">INIST</idno>
<idno type="inist">11-0081189</idno>
<date when="2011">2011</date>
<idno type="stanalyst">PASCAL 11-0081189 INIST</idno>
<idno type="RBID">Pascal:11-0081189</idno>
<idno type="wicri:Area/PascalFrancis/Corpus">002046</idno>
<idno type="wicri:Area/PascalFrancis/Curation">003E81</idno>
<idno type="wicri:Area/PascalFrancis/Checkpoint">001474</idno>
<idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">001474</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">X-ray and radio variability in the low-luminosity active galactic nucleus NGC 7213</title>
<author><name sortKey="Bell, M E" sort="Bell, M E" uniqKey="Bell M" first="M. E." last="Bell">M. E. Bell</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Tzioumis, T" sort="Tzioumis, T" uniqKey="Tzioumis T" first="T." last="Tzioumis">T. Tzioumis</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Australia Telescope National Facility, CSIRO</s1>
<s2>Marsfield, NSW 2122</s2>
<s3>AUS</s3>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>Australie</country>
<wicri:noRegion>Marsfield, NSW 2122</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Uttley, P" sort="Uttley, P" uniqKey="Uttley P" first="P." last="Uttley">P. Uttley</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Fender, R P" sort="Fender, R P" uniqKey="Fender R" first="R. P." last="Fender">R. P. Fender</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Arevalo, P" sort="Arevalo, P" uniqKey="Arevalo P" first="P." last="Arevalo">P. Arevalo</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Strasse 1</s1>
<s2>85741 Garching</s2>
<s3>DEU</s3>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>Allemagne</country>
<wicri:noRegion>85741 Garching</wicri:noRegion>
<wicri:noRegion>Karl-Schwarzschild-Strasse 1</wicri:noRegion>
<wicri:noRegion>85741 Garching</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Departamento de Ciencias Fisicas, Universidad Andres Bello, Av. Republica 252</s1>
<s2>Santiago</s2>
<s3>CHL</s3>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>Chili</country>
<wicri:noRegion>Santiago</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Breedt, E" sort="Breedt, E" uniqKey="Breedt E" first="E." last="Breedt">E. Breedt</name>
<affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Department of Physics, University of Warwick, Gibbet Hill Road</s1>
<s2>Coventry CV4 7AL</s2>
<s3>GBR</s3>
<sZ>6 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Coventry CV4 7AL</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Mchardy, I" sort="Mchardy, I" uniqKey="Mchardy I" first="I." last="Mchardy">I. Mchardy</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Calvelo, D E" sort="Calvelo, D E" uniqKey="Calvelo D" first="D. E." last="Calvelo">D. E. Calvelo</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Jamil, O" sort="Jamil, O" uniqKey="Jamil O" first="O." last="Jamil">O. Jamil</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Highfield, Southampton SO17 1BJ</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Kording, E" sort="Kording, E" uniqKey="Kording E" first="E." last="Körding">E. Körding</name>
<affiliation wicri:level="1"><inist:fA14 i1="06"><s1>AIM/CEA Saclay and University Paris Diderot, l'Orme des Merisers</s1>
<s2>91219 Gif-sur-vette</s2>
<s3>FRA</s3>
<sZ>10 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>91219 Gif-sur-vette</wicri:noRegion>
<wicri:noRegion>l'Orme des Merisers</wicri:noRegion>
<wicri:noRegion>91219 Gif-sur-vette</wicri:noRegion>
</affiliation>
</author>
</analytic>
<series><title level="j" type="main">Monthly Notices of the Royal Astronomical Society</title>
<title level="j" type="abbreviated">Mon. Not. R. Astron. Soc.</title>
<idno type="ISSN">0035-8711</idno>
<imprint><date when="2011">2011</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><title level="j" type="main">Monthly Notices of the Royal Astronomical Society</title>
<title level="j" type="abbreviated">Mon. Not. R. Astron. Soc.</title>
<idno type="ISSN">0035-8711</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Accretion disks</term>
<term>Active galaxies</term>
<term>Active galaxy nuclei</term>
<term>Binary X ray source</term>
<term>Black holes</term>
<term>Correlation functions</term>
<term>Cosmic x-ray sources</term>
<term>Cosmology</term>
<term>Cross correlations</term>
<term>Galaxy nuclei</term>
<term>Light curves</term>
<term>Luminosity</term>
<term>Time variation</term>
<term>Variability</term>
<term>X ray observation</term>
<term>X-ray binary stars</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Variabilité</term>
<term>Luminosité</term>
<term>Noyau galactique actif</term>
<term>Trou noir</term>
<term>Binaire RX</term>
<term>Source RX binaire</term>
<term>Corrélation croisée</term>
<term>Courbe lumière</term>
<term>Fonction corrélation</term>
<term>Observation RX</term>
<term>Variation temporelle</term>
<term>Disque accrétion</term>
<term>Galaxies actives</term>
<term>Noyau galaxies</term>
<term>Cosmologie</term>
<term>Source RX cosmique</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Cosmologie</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">We present the results of a ˜3 yr campaign to monitor the low-luminosity active galactic nucleus (LLAGN) NGC 7213 in the radio (4.8 and 8.4 GHz) and X-ray bands (2-10 keV). With a reported X-ray Eddington ratio of 7 x 10<sup>-4</sup>
L<sub>Edd</sub>
, NGC 7213 can be considered to be comparable to a hard-state black hole X-ray binary. We show that a weak correlation exists between the X-ray and radio light curves. We use the cross-correlation function to calculate a global time-lag between events in the X-ray and radio bands to be 24 ± 12 d lag (8.4 GHz radio lagging X-ray) and 40 ± 13 d lag (4.8 GHz radio lagging X-ray), respectively. The radio-radio light curves are extremely well correlated with a lag of 20.5 ± 12.9 d (4.8 GHz lagging 8.4 GHz). We explore the previously established scaling relationship between core radio and X-ray luminosities and black hole mass L<sub>R</sub>
  W<sup>0.6-0.8</sup>
L<sup>0.6</sup>
<sub>X</sub>
, known as the 'Fundamental Plane of black hole activity', and show that NGC 7213 lies very close to the best-fitting 'global' correlation for the plane as one of the most-luminous LLAGNs. With a large number of quasi-simultaneous radio and X-ray observations, we explore for the first time the variations of a single AGN with respect to the Fundamental Plane. Although the average radio and X-ray luminosities for NGC 7213 are in good agreement with the Plane, we show that there is intrinsic scatter with respect to the Plane for the individual data points.</div>
</front>
</TEI>
<inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0035-8711</s0>
</fA01>
<fA02 i1="01"><s0>MNRAA4</s0>
</fA02>
<fA03 i2="1"><s0>Mon. Not. R. Astron. Soc.</s0>
</fA03>
<fA05><s2>411</s2>
</fA05>
<fA06><s2>1</s2>
</fA06>
<fA08 i1="01" i2="1" l="ENG"><s1>X-ray and radio variability in the low-luminosity active galactic nucleus NGC 7213</s1>
</fA08>
<fA11 i1="01" i2="1"><s1>BELL (M. E.)</s1>
</fA11>
<fA11 i1="02" i2="1"><s1>TZIOUMIS (T.)</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>UTTLEY (P.)</s1>
</fA11>
<fA11 i1="04" i2="1"><s1>FENDER (R. P.)</s1>
</fA11>
<fA11 i1="05" i2="1"><s1>AREVALO (P.)</s1>
</fA11>
<fA11 i1="06" i2="1"><s1>BREEDT (E.)</s1>
</fA11>
<fA11 i1="07" i2="1"><s1>MCHARDY (I.)</s1>
</fA11>
<fA11 i1="08" i2="1"><s1>CALVELO (D. E.)</s1>
</fA11>
<fA11 i1="09" i2="1"><s1>JAMIL (O.)</s1>
</fA11>
<fA11 i1="10" i2="1"><s1>KÖRDING (E.)</s1>
</fA11>
<fA14 i1="01"><s1>School of Physics and Astronomy, University of Southampton</s1>
<s2>Highfield, Southampton SO17 1BJ</s2>
<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Australia Telescope National Facility, CSIRO</s1>
<s2>Marsfield, NSW 2122</s2>
<s3>AUS</s3>
<sZ>2 aut.</sZ>
</fA14>
<fA14 i1="03"><s1>Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Strasse 1</s1>
<s2>85741 Garching</s2>
<s3>DEU</s3>
<sZ>5 aut.</sZ>
</fA14>
<fA14 i1="04"><s1>Departamento de Ciencias Fisicas, Universidad Andres Bello, Av. Republica 252</s1>
<s2>Santiago</s2>
<s3>CHL</s3>
<sZ>5 aut.</sZ>
</fA14>
<fA14 i1="05"><s1>Department of Physics, University of Warwick, Gibbet Hill Road</s1>
<s2>Coventry CV4 7AL</s2>
<s3>GBR</s3>
<sZ>6 aut.</sZ>
</fA14>
<fA14 i1="06"><s1>AIM/CEA Saclay and University Paris Diderot, l'Orme des Merisers</s1>
<s2>91219 Gif-sur-vette</s2>
<s3>FRA</s3>
<sZ>10 aut.</sZ>
</fA14>
<fA20><s1>402-410</s1>
</fA20>
<fA21><s1>2011</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
</fA23>
<fA43 i1="01"><s1>INIST</s1>
<s2>2067</s2>
<s5>354000193526170350</s5>
</fA43>
<fA44><s0>0000</s0>
<s1>© 2011 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45><s0>3/4 p.</s0>
</fA45>
<fA47 i1="01" i2="1"><s0>11-0081189</s0>
</fA47>
<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
</fA61>
<fA64 i1="01" i2="1"><s0>Monthly Notices of the Royal Astronomical Society</s0>
</fA64>
<fA66 i1="01"><s0>USA</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>We present the results of a ˜3 yr campaign to monitor the low-luminosity active galactic nucleus (LLAGN) NGC 7213 in the radio (4.8 and 8.4 GHz) and X-ray bands (2-10 keV). With a reported X-ray Eddington ratio of 7 x 10<sup>-4</sup>
L<sub>Edd</sub>
, NGC 7213 can be considered to be comparable to a hard-state black hole X-ray binary. We show that a weak correlation exists between the X-ray and radio light curves. We use the cross-correlation function to calculate a global time-lag between events in the X-ray and radio bands to be 24 ± 12 d lag (8.4 GHz radio lagging X-ray) and 40 ± 13 d lag (4.8 GHz radio lagging X-ray), respectively. The radio-radio light curves are extremely well correlated with a lag of 20.5 ± 12.9 d (4.8 GHz lagging 8.4 GHz). We explore the previously established scaling relationship between core radio and X-ray luminosities and black hole mass L<sub>R</sub>
  W<sup>0.6-0.8</sup>
L<sup>0.6</sup>
<sub>X</sub>
, known as the 'Fundamental Plane of black hole activity', and show that NGC 7213 lies very close to the best-fitting 'global' correlation for the plane as one of the most-luminous LLAGNs. With a large number of quasi-simultaneous radio and X-ray observations, we explore for the first time the variations of a single AGN with respect to the Fundamental Plane. Although the average radio and X-ray luminosities for NGC 7213 are in good agreement with the Plane, we show that there is intrinsic scatter with respect to the Plane for the individual data points.</s0>
</fC01>
<fC02 i1="01" i2="3"><s0>001E03</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Variabilité</s0>
<s5>26</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Variability</s0>
<s5>26</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Variabilidad</s0>
<s5>26</s5>
</fC03>
<fC03 i1="02" i2="3" l="FRE"><s0>Luminosité</s0>
<s5>27</s5>
</fC03>
<fC03 i1="02" i2="3" l="ENG"><s0>Luminosity</s0>
<s5>27</s5>
</fC03>
<fC03 i1="03" i2="3" l="FRE"><s0>Noyau galactique actif</s0>
<s5>28</s5>
</fC03>
<fC03 i1="03" i2="3" l="ENG"><s0>Active galaxy nuclei</s0>
<s5>28</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>Trou noir</s0>
<s5>29</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG"><s0>Black holes</s0>
<s5>29</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE"><s0>Binaire RX</s0>
<s5>30</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>X-ray binary stars</s0>
<s5>30</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Source RX binaire</s0>
<s5>31</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Binary X ray source</s0>
<s5>31</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Fuente RX binaria</s0>
<s5>31</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Corrélation croisée</s0>
<s5>32</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Cross correlations</s0>
<s5>32</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Courbe lumière</s0>
<s5>33</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>Light curves</s0>
<s5>33</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Fonction corrélation</s0>
<s5>34</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Correlation functions</s0>
<s5>34</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Observation RX</s0>
<s5>35</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>X ray observation</s0>
<s5>35</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Observación RX</s0>
<s5>35</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Variation temporelle</s0>
<s5>36</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Time variation</s0>
<s5>36</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Variación temporal</s0>
<s5>36</s5>
</fC03>
<fC03 i1="12" i2="3" l="FRE"><s0>Disque accrétion</s0>
<s5>37</s5>
</fC03>
<fC03 i1="12" i2="3" l="ENG"><s0>Accretion disks</s0>
<s5>37</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>Galaxies actives</s0>
<s5>38</s5>
</fC03>
<fC03 i1="13" i2="3" l="ENG"><s0>Active galaxies</s0>
<s5>38</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE"><s0>Noyau galaxies</s0>
<s5>39</s5>
</fC03>
<fC03 i1="14" i2="3" l="ENG"><s0>Galaxy nuclei</s0>
<s5>39</s5>
</fC03>
<fC03 i1="15" i2="3" l="FRE"><s0>Cosmologie</s0>
<s5>40</s5>
</fC03>
<fC03 i1="15" i2="3" l="ENG"><s0>Cosmology</s0>
<s5>40</s5>
</fC03>
<fC03 i1="16" i2="3" l="FRE"><s0>Source RX cosmique</s0>
<s5>41</s5>
</fC03>
<fC03 i1="16" i2="3" l="ENG"><s0>Cosmic x-ray sources</s0>
<s5>41</s5>
</fC03>
<fN21><s1>052</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
</inist>
<affiliations><list><country><li>Allemagne</li>
<li>Australie</li>
<li>Chili</li>
<li>France</li>
<li>Royaume-Uni</li>
</country>
</list>
<tree><country name="Royaume-Uni"><noRegion><name sortKey="Bell, M E" sort="Bell, M E" uniqKey="Bell M" first="M. E." last="Bell">M. E. Bell</name>
</noRegion>
<name sortKey="Breedt, E" sort="Breedt, E" uniqKey="Breedt E" first="E." last="Breedt">E. Breedt</name>
<name sortKey="Calvelo, D E" sort="Calvelo, D E" uniqKey="Calvelo D" first="D. E." last="Calvelo">D. E. Calvelo</name>
<name sortKey="Fender, R P" sort="Fender, R P" uniqKey="Fender R" first="R. P." last="Fender">R. P. Fender</name>
<name sortKey="Jamil, O" sort="Jamil, O" uniqKey="Jamil O" first="O." last="Jamil">O. Jamil</name>
<name sortKey="Mchardy, I" sort="Mchardy, I" uniqKey="Mchardy I" first="I." last="Mchardy">I. Mchardy</name>
<name sortKey="Uttley, P" sort="Uttley, P" uniqKey="Uttley P" first="P." last="Uttley">P. Uttley</name>
</country>
<country name="Australie"><noRegion><name sortKey="Tzioumis, T" sort="Tzioumis, T" uniqKey="Tzioumis T" first="T." last="Tzioumis">T. Tzioumis</name>
</noRegion>
</country>
<country name="Allemagne"><noRegion><name sortKey="Arevalo, P" sort="Arevalo, P" uniqKey="Arevalo P" first="P." last="Arevalo">P. Arevalo</name>
</noRegion>
</country>
<country name="Chili"><noRegion><name sortKey="Arevalo, P" sort="Arevalo, P" uniqKey="Arevalo P" first="P." last="Arevalo">P. Arevalo</name>
</noRegion>
</country>
<country name="France"><noRegion><name sortKey="Kording, E" sort="Kording, E" uniqKey="Kording E" first="E." last="Körding">E. Körding</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Asie/explor/AustralieFrV1/Data/PascalFrancis/Checkpoint

HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001474 | SxmlIndent | more

HfdSelect -h $EXPLOR_AREA/Data/PascalFrancis/Checkpoint/biblio.hfd -nk 001474 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Asie
   |area=    AustralieFrV1
   |flux=    PascalFrancis
   |étape=   Checkpoint
   |type=    RBID
   |clé=     Pascal:11-0081189
   |texte=   X-ray and radio variability in the low-luminosity active galactic nucleus NGC 7213
}}

This area was generated with Dilib version V0.6.33.
Data generation: Tue Dec 5 10:43:12 2017. Site generation: Tue Mar 5 14:07:20 2024

	Serveur d'exploration sur les relations entre la France et l'Australie
	Attention, ce site est en cours de développement ! Attention, site généré par des moyens informatiques à partir de corpus bruts. Les informations ne sont donc pas validées.

Serveur d'exploration sur les relations entre la France et l'Australie

X-ray and radio variability in the low-luminosity active galactic nucleus NGC 7213

X-ray and radio variability in the low-luminosity active galactic nucleus NGC 7213

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri