J/ApJ/602/200ivo://CDS.VizieR/J/ApJ/602/200doi:10.26093/cds/vizier.16020200CDSIzotov Y.I.Thuan T.X.2017-12-07T07:27:11Z2005-12-28T16:35:33ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyh-ii-regionschemical-abundancesWe use spectroscopic observations of a sample of 82 HII regions in 76 blue compact galaxies to determine the primordial helium abundance Yp and the slope dY/dZ from the Y-O/H linear regression. To improve the accuracy of the dY/dZ measurement, we have included new spectrophotometric observations of 33 HII regions that span a large metallicity range, with oxygen abundance 12+log(O/H) varying between 7.43 and 8.30 (Z_{sun}_/30<=Z<=Z_{sun}_/4). Most of the new galaxies were selected from the First Byurakan, the Hamburg/SAO, and the University of Michigan objective prism surveys.2004ApJ...602..200Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/602/200CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AZh/79/867 : Abundances of HII regions in blue galaxies (Holovatyy+, 2002)J/ApJ/511/639 : Abundances in blue compact galaxies (Izotov+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/602/200https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/602/200http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/602/200https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/602/200https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/602/200http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/602/200GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/602/200/table1 (General parameters of galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/602/200/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/602/200/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/602/200/table1?GETtext/xml+votable180.050000true0.5412517.2663890.0055555555555555566/2109 2258 5366 5764 6046 6361 6619 7208 10348 10472 10475 10888 17867 18099 18198 18235 19417 19702 19828 19858 22890 25344 26362 26992 27079 27199 27243 28077 28335 28631 36756https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/602/200?format=asciiOpticaldefaultJ/ApJ/602/200/table1General parameters of galaxiesONameOther namescharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy name (1)charprimaryRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainpgmag? Photographic magnitudemagfloatnullablezRedshfit, derived from spectra in this paperdoublee_zrms uncertainty on zdoublePGMAG? Absolute photographic magnitude (2)magfloatnullabler_NameReferences, in refs.dat filecharSimbadSimbad column added by the CDScharNEDSimbad column added by the CDScharJ/ApJ/602/200/refsReferencesComCommentscharBibCodeBibCodecharAutAuthor's namecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numberintJ/ApJ/602/200/table3HII regions emission line intensities and equivalent widthsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namecharn_Name[1/2]? Number of the HII region when two different HII regions were extracted.intnullableLambdaWavelength0.1nmintIonIon speciesHbecH{beta} extinction coefficientfloatFHbetaUncorrected H{beta} line flux in erg/cm^2^/smW.m**-2doubleEWHbetaH{beta} absorption line equivalent width0.1nmfloatFlux? Observed flux relative to H{beta}floatnullablee_Flux? Error in FluxfloatnullableFluxc? corrected flux relative to H{beta} (1)floatnullablee_Fluxc? Error in FluxcfloatnullableEW? Equivalent width in Angstroms0.1nmfloatnullableJ/ApJ/602/200/table4HII regions ionic and total heavy element and helium abundancesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namecharn_Name[1/2]? Number of the HII region when twointnullablePropProperty and unitsValue? Value of the propertydoublenullablee_Value? Error in ValuedoublenullableJ/ApJ/602/200/table5Sample used for primordial helium abundance determinationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namecharn_Name[1/2]? Number of the HII region when two different HII regions were extractedcharO/HO/H abundancefloate_O/Hrms uncertainty on O/HfloatN/HN/H abundancefloate_N/Hrms uncertainty on N/HfloatYY abundancefloate_Yrms uncertainty on Yfloatr_O/HReferences, in refs.dat fileintSimbadSimbad column added by the CDScharNEDSimbad column added by the CDSchar