J/ApJ/944/29ivo://CDS.VizieR/J/ApJ/944/29doi:10.26093/cds/vizier.19440029CDSBentz M.C.Onken C.A.Street R.Valluri M.2025-05-21T20:14:52Z2025-02-28T12:42:10ZCDS support team

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

cds-question@unistra.frvisible-astronomyspectroscopyphotometrygalaxiesactive-galactic-nucleiWe present the results of a new reverberation mapping campaign for the broad-line active galactic nucleus (AGN) in the edge-on spiral IC4329A. Monitoring of the optical continuum with V-band photometry and broad emission-line flux variability with moderate-resolution spectroscopy allowed emission-line light curves to be measured for H{beta}, H{gamma}, and HeII{lambda}4686. We find a time delay of 16.3_-2.3_^+2.6^ days for H{beta}, a similar time delay of 16.0_-2.6_^+4.8^ days for H{gamma}, and an unresolved time delay of -0.6_-3.9_^+3.9^ days for HeII. The time delay for H{beta} is consistent with the predicted value from the relationship between AGN luminosity and broad-line region radius, after correction for the ~2.4mag of intrinsic extinction at 5100{AA}. Combining the measured time delay for H{beta} with the broad emission-line width and an adopted value of <f>=4.8, we find a central supermassive black hole mass of M_BH_=6.8_-1.1_^+1.2^x10^7^M_{sun}_. Velocity-resolved time delays were measured across the broad H{beta} emission-line profile and may be consistent with an "M"-like shape. Modeling of the full reverberation response of H{beta} was able to provide only modest constraints on some parameters, but does exhibit agreement with the black hole mass and average time delay. The models also suggest that the AGN structure is misaligned by a large amount from the edge-on galaxy disk. This is consistent with expectations from the unified model of AGNs, in which broad emission lines are expected to be visible only for AGNs that are viewed at relatively face-on inclinations.2023ApJ...944...29Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/29CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/179 : Southern Spectrophotometric Standards. I + II (Hamuy+ 1992,94)VII/110 : Rich Clusters of Galaxies (Abell+ 1989)J/MNRAS/327/265 : SMAC. III. Fundamental Plane catalog (Hudson+, 2001)J/AJ/128/1761 : HATNET variability survey (Hartman+, 2004)J/ApJ/613/682 : AGN masses and broad-line region sizes (Peterson+, 2004)J/ApJ/666/674 : ESSENCE supernova survey (Miknaitis+, 2007)J/A+A/542/A83 : CAIXA. II. AGNs from excess variance analysis (Ponti+, 2012)J/ApJ/761/123 : KELT-1 photometry and spectroscopy follow-up (Siverd+, 2012)J/ApJ/779/109 : Long-term monitoring of NGC 5548 (Peterson+, 2013)J/ApJ/806/128 : Space telescope RM project. I. NGC5548 (De Rosa+, 2015)J/ApJ/821/56 : Space telescope RM project. III. LCs (Fausnaugh+, 2016)J/MNRAS/463/3813 : ASASSN-15oi UBVI M2W1W2 light curves (Holoien+, 2016)J/ApJ/840/97 : Optical RM campaign of 5 AGNs (Fausnaugh+, 2017)J/ApJ/837/131 : Space telescope RM project. V. NGC5548 sp. (Pei+, 2017)J/ApJ/905/77 : Monitoring AGNs with Hb Asymmetry. II. (Brotherton+, 2020)J/ApJS/262/14 : AGNs with H{beta} asymmetry. III. 15 PG quasars (Bao+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/944/29https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/944/29http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/944/29https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/944/29https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/944/29http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/944/29GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/944/29/table1Continuum and emission-line light curvesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDcont[9615.1/9791.1] Heliocentric Julian date, continuum; HJDcont-2450000dtime.epoch;pos.heliocentricdoubleFV[2/3] LCO/Sinistro V-band flux density in 10^-15^erg/s/cm^2^/{AA}1e-15cW.m**-2.nm**-1phot.flux.density;em.opt.Vfloate_FV[0.01/0.1] FV uncertainty1e-15cW.m**-2.nm**-1stat.error;phot.flux.density;em.opt.VfloatHJDem[9646/9786]? Heliocentric Julian date, emission lines; HJDem-2450000dtime.epoch;pos.heliocentricdoublenullableFHb[2.19/3.2]? H{beta} integrated flux in 10^-13^erg/s/cm^2^1e-13mW.m**-2phot.flux;em.line.Hbetafloatnullablee_FHb[0.01/0.06]? FHb uncertainty1e-13mW.m**-2stat.error;phot.flux;em.line.HbetafloatnullableFHg[0.38/0.72]? H{gamma} integrated flux in 10^-13^erg/s/cm^2^1e-13mW.m**-2phot.flux;em.line.Hgammafloatnullablee_FHg[0.008/0.05]? FHg uncertainty1e-13mW.m**-2stat.error;phot.flux;em.line.HgammafloatnullableFHeII[0.1/0.75]? HeII integrated flux in 10^-13^erg/s/cm^2^1e-13mW.m**-2phot.flux;em.linefloatnullablee_FHeII[0.01/0.06]? FHeII uncertainty1e-13mW.m**-2stat.error;phot.flux;em.linefloatnullable