J/MNRAS/497/672ivo://CDS.VizieR/J/MNRAS/497/672doi:10.26093/cds/vizier/bg-fh-n0CDSArellano-Cordova K.Z.Rodriguez M.2026-08-03T07:30:03Z2023-10-26T15:08:28ZCDS support team

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

cds-question@unistra.frchemically-peculiar-starsh-ii-regionsgalaxiesvisible-astronomyspectroscopyWe use a sample of 154 observations of 124 HII regions that have measurements of both T_e_[OIII] and T_e_[NII], compiled from the literature, to explore the behaviour of the T_e_[OIII]-T_e_[NII] temperature relation. We confirm that the relation depends on the degree of ionization and present a new set of relations for two different ranges of this parameter. We study the effects introduced by our temperature relations and four other available relations in the calculation of oxygen and nitrogen abundances. We find that our relations improve slightly on the results obtained with the previous ones. We also use a sample of 26 deep, high-resolution spectra to estimate the contribution of blending to the intensity of the temperature-sensitive line [OIII]{lambda}4363, and we derive a relation to correct T_e_[OIII] for this effect. With our sample of 154 spectra, we analyse the reliability of the R, S, O3N2, N2, ONS, and C strong-line methods by comparing the metallicity obtained with these methods with the one implied by the direct method. We find that the strong-line methods introduce differences that reach ~0.2dex or more, and that these differences depend on O/H, N/O, and the degree of ionization.2020MNRAS.497..672Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/497/672CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/497/672https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/497/672http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/497/672https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/497/672https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/497/672http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/497/672GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/497/672/tablea1 (Our calculated values for electron densities, temperatures, oxygen abundances and nitrogen-to-oxygen abundance ratios for a sample of 154 observations of 124 HII regions compiled from the literature)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/497/672/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/497/672/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/497/672/tablea1?GETtext/xml+votable180.050000true129.06325-26.40933330.0055555555555555566/1848 2154-2155 2241 2666 2708 5764 6034 6046 7606 7743 7878 10106 10472 11434 14307 14311 14344 14624 15473 18098 18398 21439 21550 22080 26142 26362 26821 27243 28077 28631 28890 28913 29116 29463 29718 33078 33094 33102 33123 33126 33299 33304 33317 33328 35536 35538 37923-37924 39384 39804 40124 43845 43874 44236 46786https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/497/672?format=asciiOpticaldefaultJ/MNRAS/497/672/tablea1Our calculated values for electron densities, temperatures, oxygen abundances and nitrogen-to-oxygen abundance ratios for a sample of 154 observations of 124 HII regions compiled from the literatureSimbadNameSimbad column added by the CDSmeta.idcharnullableE_Te[NII]Upper error on Te[NII]Kstat.error;stat.maxinte_Te[NII]Lower error on Te[NII]Kstat.errorint12+logO/HOxygen abundance 12+log (O/H)phys.abundfloatE_12+logO/HUpper error on 12+logO/Hstat.error;stat.maxfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinte_12+logO/HLower error on 12+logO/Hstat.error;phys.abundfloatlogN/OLogarithm of the nitrogen-to-oxygen abundance ratiophys.abundfloatE_logN/OUpper error on logN/Ostat.error;stat.maxfloate_logN/OLower error on logN/Ostat.error;phys.abundfloatRef[1/33] Reference for the line intensitiesmeta.ref;pos.frameint_RAPosotions from Simbad (right ascension part)degpos.eq.ra;meta.main_DEPosotions from Simbad (declination part)degpos.eq.dec;meta.mainGalaxyGalaxy namemeta.id.parentcharID[1/154] Observation identifiermeta.idintf_Galaxy[1/5]? Flag on Galaxy (1)meta.codeintnullableNameName of the HII regionmeta.id;meta.maincharf_Name[*67 ] Flag on Name (2)meta.codecharl_ne[SII]Limit flag on ne[SII]meta.code.errorcharne[SII]? Electron density from the [SII] linecm**-3phys.density;phys.electronintnullableE_ne[SII]? Upper error on ne[SII]cm**-3stat.error;stat.maxintnullablee_ne[SII]? Lower error on ne[SII]cm**-3stat.errorintnullablef_ne[SII][*] Flag on ne[SII] (3)meta.codecharl_ne[OII]Limit flag on ne[OII]meta.code.errorcharne[OII]? Electron density from the [OII] linecm**-3phys.density;phys.electronintnullableE_ne[OII]? Upper error on ne[OII]cm**-3stat.error;stat.maxintnullablee_ne[OII]? Lower error on ne[OII]cm**-3stat.errorintnullableTe[OIII]Electron temperature from the [OIII] line (4)Kphys.temperature.electron;phys.electronintE_Te[OIII]Upper error on Te[OIII]Kstat.error;stat.maxinte_Te[OIII]Lower error on Te[OIII]Kstat.errorintTe[NII]Electron temperature from the [NII] lineKphys.temperature.electron;phys.electronintJ/MNRAS/497/672/tablea2Our calculated values for the oxygen abundances using T_e_ and the R, S, ONS, C, O3N2, and N2 strong-line methods for the of extragalactic HII regions(O/H)ROxygen abundance 12+log(O/H) calculated using the R method of Pilyugin & Grebel (2016MNRAS.457.3678P)phys.abundfloate_(O/H)RError on (O/H)Rstat.errorfloat(O/H)SOxygen abundance 12+log(O/H) calculated using the S method of Pilyugin & Grebel (2016MNRAS.457.3678P)phys.abundfloate_(O/H)SError on (O/H)Sstat.errorfloat(O/H)TeOxygen abundance 12+log(O/H) calculated using T_e_phys.abundfloatE_(O/H)TeUpper error on (O/H)Testat.error;stat.maxfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/154] Observation identifiermeta.idintGalaxyGalaxy namemeta.id.parentcharNameName of the HII regionmeta.id;meta.maincharf_Name[*] Flag on Name (1)meta.codechare_(O/H)TeLower error on (O/H)Testat.errorfloat(O/H)ONSOxygen abundance 12+log(O/H) calculated using the ONS method of Pilyugin et al. (2010ApJ...720.1738P)phys.abundfloate_(O/H)ONSError on (O/H)ONSstat.errorfloat(O/H)COxygen abundance 12+log(O/H) calculated using the C method of Pilyugin et al. (2012MNRAS.424.2316P, Cat. J/MNRAS/424/2316)phys.abundfloate_(O/H)CError on (O/H)Cstat.errorfloat(O/H)O3N2? Oxygen abundance 12+log(O/H) calculated using the O3N2 method of Marino et al. (2013A&A...559A.114M, Cat. J/A+A/559/A114)phys.abundfloatnullablee_(O/H)O3N2? Error on (O/H)O3N2stat.errorfloatnullable(O/H)N2? Oxygen abundance 12+log(O/H) calculated using the N2 method of Marino et al. (2013A&A...559A.114M, Cat. J/A+A/559/A114)phys.abundfloatnullablee_(O/H)N2? Error on (O/H)N2stat.errorfloatnullableJ/MNRAS/497/672/refsReferences for Table A1BibCodeBibCodemeta.bib.bibcodecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharRef[1/33] Reference numbermeta.id;meta.mainint