J/A+A/464/885ivo://CDS.VizieR/J/A+A/464/885doi:10.26093/cds/vizier.34640885CDSGuseva N.G.Izotov Y.I.Papaderos P.Fricke K.J.2017-06-30T05:48:36Z2008-08-26T06:51:37ZCDS support team

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

cds-question@unistra.frh-ii-regionschemical-abundancesContinuing the systematic determination of the electron temperature of HII regions using the Balmer and/or Paschen discontinuities by Guseva et al. (2006ApJ...644..890G) we focus here on 3.6m ESO telescope observations of a large new sample of 69 HII regions in 45 blue compact dwarf (BCD) galaxies. This data set spans a wide range in metallicity (Z_{sun}_/60<Z<Z_{sun}_/3) and, combined with the sample of 47 HII regions from Guseva et al. (2006ApJ...644..890G), yields the largest spectroscopic data set ever used to derive the electron temperature in the H^+^ zone. In the same way as in Guseva et al. (2006ApJ...644..890G) we have used a Monte Carlo technique to vary free parameters and to calculate a series of model spectral energy distributions (SEDs) for each HII region. The electron temperature in the H^+^ zones was derived from the best fitting synthetic and observed SEDs in the wavelength range ~3200-5100{AA}, which includes the Balmer jump. On the base of the present large spectroscopic sample we find that in hot (Te(H^+^)>11000K) HII regions the temperature of the O^2+^ zone, determined from doubly ionised oxygen forbidden lines, does not differ statistically from the temperature of the H^+^ zone. Thus, we confirm and strengthen the finding by Guseva et al. (2006ApJ...644..890G). We emphasize that due to a number of modelling assumptions and the observational uncertainties for individual objects, only a large, homogeneous sample, as the one used here, can enable a conclusive study of the relation between Te(H^+^) and Te(OIII).2007A&A...464..885Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/464/885CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/20 : Catalogue of HII Regions (Sharpless 1959)J/A+A/416/475 : Long slit spectroscopy of HII regions (Marquez+, 2004)J/A+A/416/515 : Long slit spectroscopy of HII regions (Marquez+, 2004)J/A+AS/131/319 : HII regions catalogue (Petit+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/464/885https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/464/885http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/464/885https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/464/885https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/464/885http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/464/885GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/464/885/HII (Observed parameters, electron temperatures, ionic and total element abundances in the 53 HII regions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/464/885/HII?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/464/885/HII?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/464/885/HII?GETtext/xml+votable180.050000true201.4525-11.61055560.0055555555555555566/17075 17832 18002 18032 18081 18793 19172 19417 21970 24696 25045 25169 25594 25659 25737 25739 25851 25938 25959 26142 26178 26194 26362 26959 27199 27243 31316 36766 41987 43754 46786 46790 47701https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/464/885?format=asciiOpticaldefaultJ/A+A/464/885/HIIObserved parameters, electron temperatures, ionic and total element abundances in the 53 HII regionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharprimaryCHbExtinction coefficientobs.atmos.extinctionfloatFHbetaObserved Hbeta flux (10^-14^erg/cm^2^/s)1e-17W.s**-1.m**-2phot.flux;em.line.HbetafloatEWabsEquivalent width of hydrogen absorption lines0.1nmspect.line.eqWidthfloatTOIIIElectron temperature Te(OIII)Kphys.temperature.electron;phys.electroninte_TOIIIError of the electron temperatureKstat.errorintTOIIElectron temperature Te(OII)Kphys.temperature.electron;phys.electroninte_TOIIError of the electron temperatureKstat.errorintTSIIIElectron temperature Te(SIII)Kphys.temperature.electron;phys.electroninte_TSIIIError of the electron temperatureKstat.errorintO+/H+Abundance O+/H+ (multiplied by 10^4^)phys.abundfloate_O+/H+Error of O+/H+ (multiplied by 10^4^)stat.error;phys.abundfloatO2+/H+Abundance O++/H+ (multiplied by 10^4^)phys.abundfloate_O2+/H+Error of O++/H+ (multiplied by 10^4^)stat.error;phys.abundfloatO3+/H+Abundance O+++/H+ (multiplied by 10^6^)phys.abundfloate_O3+/H+Error of O+++/H+ (multiplied by 10^6^)stat.error;phys.abundfloatO/HAbundance O/H (multiplied by 10^4^)phys.abundfloate_O/HError of O/H (multiplied by 10^4^)stat.error;phys.abundfloat12O/HAbundance 12+logO/H (in dex)phys.abundfloate_12O/HError of 12+logO/H (in dex)stat.error;phys.abundfloatNe2+/H+Abundance Ne++/H+ (multiplied by 10^5^)phys.abundfloate_Ne2+/H+Error of Ne++/H+ (multiplied by 10^5^)stat.error;phys.abundfloatICFNeIonization correction factor ICF(Ne)arith.factorfloatlogNe/OLogarithm of Ne/O abundance ratio (in dex)phys.abundfloate_logNe/OError of logNe/O (in dex)stat.error;phys.abundfloatFe2+/H+1Abundance Fe++/H+ from the line 4658A (1)phys.abundfloate_Fe2+/H+1Error of Fe++/H+ from the line 4658A (1)stat.errorfloatFe2+/H+2Abundance Fe++/H+ from the line 4988A (1)phys.abundfloate_Fe2+/H+2Error of Fe++/H+ from the line 4988A (1)stat.errorfloatICFFeIonization correction factor ICF(Fe)arith.factorfloatlogFe/O1Logarithm of Fe/O abundance ratio from 4658{AA} line (in dex)phys.abundfloate_logFe/O1Error of logFe/O from the 4658A line (in dex)stat.error;phys.abund.FefloatlogFe/O2Logarithm of Fe/O abundance ratio from 4988{AA} line (in dex)phys.abundfloate_logFe/O2Error of logFe/O from the 4988A line (in dex)stat.error;phys.abund.Fefloat_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.mainJ/A+A/464/885/table3bObserved and corrected fluxes and equivalent widths of the emission lines in 53 HII regionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharlambdaNon-redshifted wavelength0.1nmem.wlintIonEmission-line identificationphys.atmol.ionStagecharFluxObserved emission-line flux relative to Hbeta (1)%spect.line.intensity;arith.ratiofloate_Flux1{sigma} relative flux error (1)%stat.error;phot.fluxfloatFluxcCorrected emission-line flux relative to Hbeta (1)%spect.line.intensity;arith.ratiofloate_Fluxc1{sigma} relative flux error (1)%stat.errorfloatEWEquivalent width of the emission line0.1nmspect.line.eqWidthfloat