J/A+A/664/A46ivo://CDS.VizieR/J/A+A/664/A46doi:10.26093/cds/vizier.36640046CDSAndonie C.Bauer F.E.Carraro R.Arevalo P.Alexander D.M.Brandt W.N.,Buchner J.He A.Koss M.J.Ricci C.Salinas V.Solimano M.Tortosa A.,Treister E.2022-12-16T22:26:00Z2022-08-04T09:01:03ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fractive-galactic-nucleix-ray-sourcesThe 6.4keV Fe K{alpha} emission line is a ubiquitous feature in X-ray spectra of active galactic nuclei (AGN), and its properties track the interaction between the variable primary X-ray continuum and the surrounding structure from which it arises. We clarify the nature and origin of the narrow Fe K{alpha} emission using X-ray spectral, timing, and imaging constraints, plus possible correlations to AGN and host galaxy properties, for 38 bright nearby AGN (z<0.5) from the Burst Alert Telescope AGN Spectroscopic Survey. Modeling Chandra and XMM-Newton spectra, we computed line full-width half-maxima (FWHMs) and constructed Fe K{alpha} line and 2-10keV continuum light curves. The FWHM provides one estimate of the Fe K{alpha} emitting region size, RFeK{alpha}, assuming virial motion. A second estimate comes from comparing the degree of correlation between the variability of the continuum and line-only light curves, compared to simulated light curves. Finally, we extracted Chandra radial profiles to place upper limits on RFeK{alpha}. For 90% (21/24) of AGN with FWHM measurements, RFeK{alpha} is smaller than the fiducial dust sublimation radius, Rsub. From timing analysis, 37 and 18 AGN show significant continuum and Fe K{alpha} variability, respectively. Despite a wide range of variability properties, the constraints on the Fe K{alpha} photon reprocessor size independently confirm that RFeK{alpha} is smaller than Rsub in 83% of AGN. Finally, the imaging analysis yields loose upper limits for all but two sources; notably, the Circinus Galaxy and NGC 1068 show significant but subdominant extended Fe K{alpha} emission out to ~100 and ~800pc, respectively. Based on independent constraints, we conclude that the majority of the narrow Fe K{alpha} emission in typical AGN predominantly arises from regions smaller than and presumably inside Rsub, and thus it is associated either with the outer broad line region or outer accretion disk. However, the large diversity of continuum and narrow Fe K{alpha} variability properties are not easily accommodated by a universal scenario.2022A&A...664A..46Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/664/A46CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/850/74 : Swift/BAT AGN Spectroscopic Survey. I. (Koss+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/664/A46https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/664/A46http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/664/A46https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/664/A46https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/664/A46http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/664/A46GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/664/A46/sources (List of observed sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/664/A46/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/664/A46/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/664/A46/sources?GETtext/xml+votable180.050000true107.172875-49.551750.0055555555555555566/941 1701 5018 7606 7642 7869 8922 10912 10927 11101 11388 14744 15351 16184 17075 17754 18683 19283 21996 23323 26292 27767 28517 34104 34531 38268 38868 39118 40410 41586 42016 43262 43806 43877 45446 46399 46424 49042https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/664/A46?format=asciiX-raydefaultJ/A+A/664/A46/sourcesList of observed sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource namemeta.id;meta.maincharRAJ2000Simbad right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad declination (J2000)pos.eq.dec;meta.mainNNumber of observations in bfparams.dat filemeta.numberintSNameSimbad namemeta.idcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/664/A46/tablea1Summary of each observation used in this paperrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource namemeta.id;meta.maincharObsObservatory namemeta.id;instr.obstycharInstInstrumentmeta.id;instrcharObsIDObservation IDmeta.id;obslongObsDateStart Observation date (YYYY-MM-DD)time.start;obsnullableExpTime[2.0/184.6] Exposure time (ks)kstime.duration;obs.exposurefloatSpectrumShape of the extracted spectrum (1)meta.notecharzRedshift (2)src.redshiftfloatGamma? Photon indexspect.indexfloatnullablebGamma? Lower bound (90%) of the Photon index (3)spect.index;stat.minfloatnullableBGamma? Upper bound (90%) of the Photon index (3)spect.index;stat.maxfloatnullablelogNHLine of sight column density in logarithmic scalelog(cm**-2)phys.columnDensityfloatblogNH? Lower bound (90%) NH in logarithmic scale (3)log(cm**-2)phys.columnDensity;stat.minfloatnullableBlogNH? Upper bound (90%) NH in logarithmic scalelog(cm**-2)phys.columnDensity;stat.maxfloatnullableSigma? Fe Ka line widtheVspect.line.widthfloatnullablebSigma? Lower bound (90%) Fe Ka line width (3)eVspect.line.width;stat.minfloatnullableBSigma? Upper bound (90%) Fe Ka line width (3)eVspect.line.width;stat.maxfloatnullableF210keVIntrinsic 2-10 keV continuum fluxmW.m**-2phot.flux;em.X-rayfloatb_F210keV? Lower bound (90%) 2-10 keV continuum flux (3)mW.m**-2phot.flux;em.X-ray;stat.minfloatnullableB_F210keVUpper bound (90%) 2-10 keV continuum fluxmW.m**-2phot.flux;em.X-ray;stat.maxfloatFFeKaIntrinsic Fe Ka line fluxmW.m**-2phot.flux;spect.linefloatb_FFeKa? Lower bound (90%) Fe Ka line flux (3)mW.m**-2phot.flux;spect.line;stat.minfloatnullableB_FFeKaUpper bound (90%) Fe Ka line fluxmW.m**-2phot.flux;spect.line;stat.maxfloatStatValue of the statisticstat.valuedoubleDOFNumber of degrees of freedommeta.numberint