J/A+A/599/A76ivo://CDS.VizieR/J/A+A/599/A76doi:10.26093/cds/vizier.35990076CDSMelnick J.Telles E.Bordalo V.Chavez R.Fernandez-arenas D.,Terlevich E.Terlevich R.Bresolin F.Plionis M.Basilakos S.2017-09-04T07:59:36Z2017-07-03T09:36:41ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyh-ii-regionsline-intensitiesgalaxy-kinematicsThe correlation between emission-line luminosity (L) and profile-width ({sigma}) for HII galaxies provides a powerful method to measure the distances to galaxies over a wide range of redshifts. In this paper, we use SDSS spectrophotometry to explore the systematics of the correlation using the [OIII]5007 lines instead of H{alpha} or H{beta} to measure luminosities and line widths. We also examine possible systematic effects involved in measuring the profile-widths and the luminosities through different apertures. We find that the green L-{sigma} relation, defined using [OIII]5007 luminosities, is significantly more sensitive than H{beta} to the effects of age and the physical conditions of the nebulae, which more than offsets the advantage of the higher strength of the [OIII]5007 lines. We then explore the possibility of mixing [OIII]5007 profile-widths with SDSS H{beta} luminosities using the Hubble constant H_0_ to quantify the possible systematic effects. We find the mixed L(H{beta})-{sigma}_[OIII]_ relation to be at least as powerful as the canonical L-{sigma} relation as a distance estimator, and we show that evolutionary corrections do not change the slope and the scatter of the correlation and, therefore, do not bias the L-{sigma} distance indicator at high redshifts. Locally, however, the luminosities of the giant HII regions that provide the zero-point calibrators are sensitive to evolutionary corrections and may bias the Hubble constant if their mean ages, as measured by the equivalent widths of H{beta}, are significantly different from the mean age of the HII galaxies. Using a small sample of 16 ad-hoc zero point calibrators we obtain a value of H_0_=66.4^+5.0^_-4.5_km/s/Mpc for the Hubble constant, which is fully consistent with the best modern determinations, and which is not biased by evolutionary corrections.2017A&A...599A..76Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/599/A76CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/442/3565 : L-{sigma} relation for massive star formation (Chavez+ 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/599/A76https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/599/A76http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/599/A76https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/599/A76https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/599/A76http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/599/A76GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/599/A76/table1 (Objects from Chavez et al. (2014, Cat. J/MNRAS/442/3565))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/599/A76/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/599/A76/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/599/A76/table1?GETtext/xml+votable180.050000true1.73757080.85722220.005555555555555556Cone search capability for table J/A+A/599/A76/table2 (Objects from Bordalo & Telles (2011ApJ...735...52B))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/599/A76/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/599/A76/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/599/A76/table2?GETtext/xml+votable180.050000true29.5391167-0.11033890.0055555555555555566/4109 4164 4184 4258 4276 4298 4330 4464 4503 4516 4576 4685 4716 4738 4758 4773 4815 4871 4913 5018 5100 5173 5203 5223 5246 5252 5290 5637 5669 5731 6215 6402 7185 7208 7259 7315 7328 7354 7381 7483 7524 9481 10441 17242 17249 17516 17571 17725 17748 17816 17867 18025 18091 18177 18388 18785 18845 18880 18953 19028 19036 19323 19389 19754 19756 20002-20003 21877-21878 22719 23187 25227 25253 25594 25659 25851 25938 26302 26390 26551 26555 26964 26992 27053 27057 27068 27227 27243 27260 27291 27303 27333 27396 27409 27431 27446 27457 27512 27581 27604 27677 27770 28290 28363 31487 31725 34036 34242 34426 34478 34636 36716 36766 36779 36785 36801 38833 38866 38879 38906 39574 43754 44281 46790 49011 49016 49095https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/599/A76?format=asciidefaultJ/A+A/599/A76/table1Objects from Chavez et al. (2014, Cat. J/MNRAS/442/3565)NameName (1)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintzRedshiftsrc.redshiftfloatsigmaVelocity dispersion from [OIII]5007 linekm/sphys.veloc.dispersionfloate_sigmarms uncertainty on sigmakm/sstat.errorfloatlogLHbH{beta} luminositylog(1e-07W)phys.luminosityfloate_logLHbrms uncertainty on logHblog(1e-07W)stat.errorfloatEWHbH{beta} equivalent width0.1nmspect.line.eqWidth;em.line.Hbetafloate_EWHbrms uncertainty on EWHb (2)0.1nmstat.errorfloatSimbadNameSimbad column added by the CDSmeta.idchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/599/A76/table2Objects from Bordalo & Telles (2011ApJ...735...52B)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (1)meta.id;meta.maincharzRedshiftsrc.redshiftfloatsigmaVelocity dispersion from [OIII]5007 linekm/sphys.veloc.dispersionfloate_sigmarms uncertainty on sigmakm/sstat.errorfloatlogLHbH{beta} luminositylog(1e-07W)phys.luminosityfloate_logLHbrms uncertainty on logHblog(1e-07W)stat.errorfloatEWHbH{beta} equivalent width0.1nmspect.line.eqWidth;em.line.Hbetafloate_EWHbrms uncertainty on EWHb (2)0.1nmstat.errorfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main