J/MNRAS/501/1370ivo://CDS.VizieR/J/MNRAS/501/1370doi:10.26093/cds/vizier.75011370CDSDors O.L.Contini M.Riffel R.A.Perez-Montero E.Krabbe A.C.,Cardaci M.V.Hagele G.F.2025-05-06T20:14:08Z2023-11-15T07:50:15ZCDS support team

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

cds-question@unistra.frseyfert-galaxiesactive-galactic-nucleichemically-peculiar-starsredshiftedvisible-astronomyWe build detailed composite models of photoionization and shock ionization based on the SUMA code to reproduce emission lines emitted from the Narrow Line Regions (NLR) of Seyfert 2 nuclei. The aim of this work is to investigate diagram active galactic nucleus (AGN) positions according to shock parameters, shock effects on the gas temperature and ionization structures and derive a semi-empirical abundance calibration based on emission-line ratios little sensitive to the shock presence. The models were used to reproduce optical (3000<{lambda}({AA})<7000) emission line intensities of 244 local (z~<0.4) Seyfert 2s, whose observational data were selected from Sloan Digital Sky Survey DR7. Our models suggest that shocks in Seyfert 2 nuclei have velocities in the range of 50-300km/s and imply a narrower metallicity range (0.6~<(Z/Z_{sun}_)~<1.6) than those derived using pure photoionization models. Our results indicate that shock velocity in AGNs cannot be estimated using standard optical line ratio diagrams, based on integrated spectra. Our models predict a different temperature structure and O^+^/O and O^2+^/O fractional abundances throughout the NLR clouds than those derived from pure photoionization models, mainly in shock-dominated objects. This suggests that, in order to minimize the shock effects, the combination of emission-lines emitted by ions with similar intermediate ionization potential could be good metallicity indicators. Finally, we derive two calibrations between the N/O abundance ratio and the N_2_O_2_=log([NII]{lambda}6584/[OII]{lambda}3727) and N_2_=log([NII]{lambda}6584/H{alpha}) indexes which agree with that derived from pure photoionization models.2021MNRAS.501.1370Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/501/1370CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7J/MNRAS/492/468 : Chemical abundances of Seyfert 2 AGNs - I (Dors+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/501/1370https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/501/1370http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/501/1370https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/501/1370https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/501/1370http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/501/1370GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/501/1370/table1 (De-reddened observed and predicted fluxes (relative to H{beta}=1.00) for our of Seyfert 2 nuclei)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/501/1370/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/501/1370/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/501/1370/table1?GETtext/xml+votable180.050000true2.0822261-0.00074890.0055555555555555566/0 547 4098 4102 6527 6577 6581 6583 6640 7184 7213 7219 7222-7223 7228 7230 7300 7470-7471 7482 7514 8196 8207 8209-8210 8214 8230 9042 9603 9607 9624 9633 9635 9637 9645 9647 9982-9983 10120 10180 10182-10183 10189-10190 10213 10215 10221 11348 11351 11357 11471 11489 11591 11833 11838 11880 11911 11922 11929 11947 11952-11954 17229 17661 17757 17768-17769 17771 17774 17825 17827 17830 17835 17837 18025 18062 18082 18089 18178 18302 18395 18411 18771 18831 18833 19045 19751 21845 21851-21852 21855 23045 23052 23075 23146 23186 23193 23196 23208 23211 23233 25598-25599 25935 25958 25963 25974 25979 25982 25997 25999 26003-26004 26012 26018 26024-26026 26032 26036-26037 26040 26042 26044 26052 26055 26059 26063 26066 26084 26092 26167 26170-26171 26182 26184 26189 26194-26198 26212 26214-26215 26222 26227 26229 26257 26263 26268 26308-26309 26311 26313 26373 26384 26942-26943 26949 26965-26966 26970 26972 26979 26981 26983 26991 26995-26997 27034 27036 27045-27046 27048 27052 27197 27226 27238 27249 27252-27254 27258 27260 27288 27295 27305 27307 27311 27313 27331 27333 27394 27529 27652 27661-27662 31385 31394 31403 31419 31422 31437 31458 31464 36723 36726 36766 36807 36810https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/501/1370?format=asciiOpticaldefaultJ/MNRAS/501/1370/table1De-reddened observed and predicted fluxes (relative to H{beta}=1.00) for our of Seyfert 2 nucleiSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSource identifier (1)meta.idcharNameSDSS source name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.mainchar[OII]3726+3729/HbDe-reddened [OII]3726+3729 flux relative to H{beta}phot.flux;spect.line;arith.ratiofloat[NeIII]3869/HbDe-reddened [NeIII]3869 flux relative to H{beta}phot.flux;spect.line;arith.ratiofloat[OIII]4363/HbDe-reddened [OIII]4363 flux relative to H{beta}phot.flux;spect.line;arith.ratiofloat[OIII]4959+5007/HbDe-reddened [OIII]4959+5007 flux relative to H{beta}phot.flux;spect.line;arith.ratiofloatHeII5876/HbDe-reddened HeII5876 flux relative to H{beta}phot.flux;spect.line;arith.ratiofloat[OI]6300/HbDe-reddened [OI]6300 flux relative to H{beta}phot.flux;spect.line;arith.ratiocharHa/HbDe-reddened H{alpha} flux relative to H{beta}phot.flux;spect.line;arith.ratiofloat[NII]6584/HbDe-reddened [NII]6584 flux relative to H{beta}phot.flux;spect.line;arith.ratiofloat[SII]6716/HbDe-reddened [SII]6716 flux relative to H{beta}phot.flux;spect.line;arith.ratiofloat[SII]6731/HbDe-reddened [SII]6731 flux relative to H{beta}phot.flux;spect.line;arith.ratiofloat[AIII]7135/HbDe-reddened [AIII]7135 flux relative to H{beta}phot.flux;spect.line;arith.ratiofloatMass? Stellar mass1e+07solMassphys.massfloatnullablez? Redshiftsrc.redshiftdoublenullablee_z? Error on zstat.error;src.redshiftdoublenullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullableJ/MNRAS/501/1370/table2Model parameters selected to fit the observation emission-line ratios of each object of the samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDModel source identifiermeta.id;meta.maincharVsShock velocitykm/sphys.velocintn0Atomic pre-shock densitycm**-3phys.densityintDGeometrical thickness of the cloud1e+16cmsrc.morph.scLengthdoubleF? Radio flux emitted vy the AGN1e+10ph.cm**-2.s**-1.eV**-1phot.flux.density;em.radiofloatnullableN/HN/H abundancephys.abundfloatO/HO/H abundancephys.abundfloatS/HS/H abundancephys.abundfloatF(Hbeta)Flux of H{beta} calculated at the nebulamW.m**-2phot.flux;em.line.Hbetadouble