J/MNRAS/521/1556ivo://CDS.VizieR/J/MNRAS/521/1556doi:10.26093/cds/vizier.75211556CDSPerez-Montero E.Amorin R.Perez-Diaz B.Garcia-Benito R.2024-11-06T20:34:44Z2023-03-15T08:08:34ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleichemical-abundancesultraviolet-astronomyWe present an adapted version of the code HII-CHI-mistry-UV (Perez-Montero & Amorin, 2017MNRAS.467.1287P) to derive chemical abundances from emission lines in the ultraviolet, for use in narrow line regions (NLR) of Active Galactic Nuclei (AGN). We evaluate different ultraviolet emission line ratios and how different assumptions about the models, including the presence of dust grains, the shape of the incident spectral energy distribution, or the thickness of the gas envelope around the central source, may affect the final estimates as a function of the set of emission lines used. We compare our results with other published recipes for deriving abundances using the same emission lines and show that deriving the carbon-to-oxygen abundance ratio using CIII] {lambda}1909{AA} and OIII] {lambda}1665{AA} emission lines is a robust indicator of the metal content in AGN that is nearly independent of model assumptions, similar to the case of star-forming regions. Moreover, we show that a prior determination of C/O allows for a much more precise determination of the total oxygen abundance using carbon UV lines, as op- posed to assuming an arbitrary relationship between O/H and C/O, which can lead to non-negligible discrepancies.2023MNRAS.521.1556Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/521/1556CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/521/1556https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/521/1556http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/521/1556https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/521/1556https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/521/1556http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/521/1556GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/521/1556/table2 (UV emission lines for the AGN and references)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/521/1556/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/521/1556/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/521/1556/table2?GETtext/xml+votable180.050000true40.6696217-0.01329440.0055555555555555566/162 220 573 736 1009 2022 2075 2170 2327 2617 2710 2949 3417 4108 4299 4352 4680 4708 4828 4883 5063 5086 5157 5181 5352 5413 5553 5592 5858 5873 6037 6574 6589 6603 6619 6899 6964 7178 7869 8644 8769 9230 9621 9655 10052 10260 10347 10457 10529 10787 10877 10896 11073 11252 11416 11523 11601 11606-11607 11845 12306 12338 12687 12693 13074 13455 15011 15126 15354 15359 16005 16043 16090 16762 16784 16923 16934 17026 17095 17224 17399 17402 17445 17544 17690 17754 17823 17850 18231 18401 18544 18713 18773 18786 18913 19026 19390 19557 19619 19655 19713 19798 20034 20122 20167 20369 20483 21090 21171 21881 21980 22398 23027 23069 23375 24765 25269 25281 25479 25610 25720 25870 25907 25919 25961 26011 26033 26202 26299 26316 26438 26457 26511 26673 26690 26993 27257-27258 27408 27436 27731 27880 27908 28142 28376 28574 28590 28648 28994 29605 29896 30031 30076 30779 30844 30885 31162 31332-31333 31405 31575 31589 31940 32396 33202 33871 35788 35795 35935 36052 36151 36160 36189 36219 36228 36392 36493 36497 36601 36627 38741 40240 40326 40378 40395 40529 40742 40825 42930 42950 43677 43925 44201 44337 44403 44662 44713 44755 44771 45169 46097 47049 47956 48053 48340 48347 48572 48714 48803 48877https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/521/1556?format=asciiUVdefaultJ/MNRAS/521/1556/table2UV emission lines for the AGN and referencesSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDNames or identificators of the objectsmeta.id;meta.maincharz[0.0/6.13] Redshiftssrc.redshift;pos.heliocentricfloatTypeSpectral type of the objects (1)src.spTypecharLya1216[0.0/713.0]? Ly-alpha 1216{AA} line flux1e-17W.m**-2phot.flux;spect.linedoublenullablee_Lya1216[0.0/100.0]? Ly-alpha 1216{AA} flux uncertainty1e-17W.m**-2stat.errorfloatnullableNV1239[0.0/224.0]? [NV] 1239{AA} line flux1e-17W.m**-2phot.flux;spect.linedoublenullableRefReferences for emission lines (2)meta.refchare_NV1239[0.0/41.0]? [NV] 1239{AA} flux uncertainty1e-17W.m**-2stat.errordoublenullableCIV1549[0.0/520.0]? CIV 1549{AA} line flux1e-17W.m**-2phot.flux;spect.linedoublenullablee_CIV1549[0.0/80.0]? CIV 1549{AA} flux uncertainty1e-17W.m**-2stat.errorfloatnullableHeII1640[0.0/187.0]? HeII 1640{AA} line flux1e-17W.m**-2phot.flux;spect.linedoublenullablee_HeII1640[0.0/29.0]? HeII 1640{AA} flux uncertainty1e-17W.m**-2stat.errordoublenullableOIII1665[0.0/22.0]? [OIII] 1665{AA} line flux1e-17W.m**-2phot.flux;spect.linefloatnullablee_OIII1665[0.0/8.0]? [OIII] 1665{AA} flux uncertainty1e-17W.m**-2stat.errorfloatnullableCIII1909[0.0/240.0]? CIII] 1909{AA} line flux1e-17W.m**-2phot.flux;spect.linedoublenullablee_CIII1909[0.0/35.0]? CIII] 1909{AA} flux uncertainty1e-17W.m**-2stat.errordoublenullableNotesNotes on units or upper limits (3)meta.notechar_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/521/1556/table3Chemical abundances estimated from UV emission linesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDNames or identificators of the objectsmeta.id;meta.maincharOH[7.53/9.09]? UV-based oxygen abundance 12+log(O/H)phys.abundfloatnullablee_OH[0.01/0.68]? UV-based oxygen abundance 12+log(O/H) errorstat.errorfloatnullableCO[-0.87/0.24]? UV-based carbon-to-oxygen abundance ratio log(C/O)phys.abundfloatnullablee_CO[0.18/0.52]? UV-based carbon-to-oxygen abundance ratio log(C/O) errorstat.errorfloatnullablelogU[-2.64/-0.56]? UV-based ionization parameter log(U)phys.ionizParam.radfloatnullablee_logU[0.01/0.65]? UV-based ionization parameter log(U) errorstat.error;pos.cartesian.xfloatnullableGrains[Yes No] The models include grains ("Yes") or are dust- free ("No")meta.codechar