J/A+A/703/A63ivo://CDS.VizieR/J/A+A/703/A63CDSFinlez C.Treister E.Bauer F.Koss M.Keel W.Maksym W.P.Sartori L.,Venturi G.Ricci C.Nagar N.Riesco C.Diaz Y.Parra M.2026-03-02T06:25:50Z2025-11-05T07:55:16ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleigalaxiesvisible-astronomyseyfert-galaxiesWe present a comprehensive study of five nearby active galaxies featuring large (tens of kiloparsecs) extended emission-line regions (EELRs). The study is based on large-format, integral-field spectroscopic observations conducted with the Multi Unit Spectroscopic Explorer (MUSE) at the Very Large Telescope (VLT). The spatially resolved kinematics of the ionized gas and stellar components show signs of rotation, bi-conical outflows, and complex behavior likely associated with past interactions. An analysis of the physical conditions of the EELRs indicates that in these systems the active galactic nucleus (AGN) is the primary ionization source. Using radiative transfer simulations, we compared the ionization state across the EELRs to estimate the required AGN bolometric luminosities at different radial distances. Then, considering the projected light travel time, we reconstructed the inferred AGN luminosity curves. We find that all sources are consistent with a fading trend in intrinsic AGN luminosity by 0.2-3dex over timescales of 40000 to 80000-years, with a time dependence consistent with previous studies of fading AGNs. These results support the hypothesis that most AGNs undergo significant fluctuations in their accretion rates over multiple timescales ranging from 10000 to 1000000-years, as proposed by existing theoretical models. These results provide new insights into the transient phases of AGN activity on previously unexplored scales and their potential long-term impact on their host galaxies through various feedback mechanisms.2025A&A...703A..63Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/703/A63CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/703/A63https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/703/A63http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/703/A63https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/703/A63https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/703/A63http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/703/A63GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/703/A63/list (List of fits maps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/703/A63/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/703/A63/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/703/A63/list?GETtext/xml+votable180.050000true234.7198117.030760.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/703/A636/8269 8288 8506 8724 28516https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/703/A63?format=asciiOpticaldefaultJ/A+A/703/A63/listList of fits mapsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainscaleScale of the imagearcsec/pixinstr.scalefloatNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitsAssocDataAssociated Data web pagemeta.ref.urlchar