J/MNRAS/545/F202ivo://CDS.VizieR/J/MNRAS/545/F2029CDSSanchez-Menguiano L.Gadotti D.A.Zurita A.Florido E.Perez I.,Coelho P.Falcon-Barroso J.Kim T.de Lorenzo-Caceres A.,Lugo-Aranda A.Z.Neumann J.de Sa-Freitas C.Sanchez-Blazquez P.2026-04-02T06:28:33Z2026-03-13T13:09:50ZCDS support team

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

cds-question@unistra.frh-ii-regionsspectroscopyline-intensitiesvisible-astronomyIn this study we perform a comparative analysis of the properties of the HII regions located in different areas of barred galaxies, with the aim of investigating the impact of bars on the physical properties of the ionised gas. Based on integral field spectroscopy data for 17 barred galaxies covering approximately the central 6x6 kpc, we detect a total of 2200 HII regions, of which 331 are located within the nuclear disc (also known as circumnuclear regions), 661 in the bar region, and 1208 in the disc. Among the physical properties of the HII regions, we explore the O/H and N/O abundances, H{alpha} luminosity, dust extinction, electron density, and H{alpha} equivalent width. We find clear differences in the properties of the HII regions between the nuclear disc, the bar and the disc, that could be explained by an enhancement in the molecular gas concentration in the central parts driven by bar-induced gas flows. As this gas is channelled towards the galaxy centre, the most extreme values in the analysed properties are found for the circumnuclear HII regions. Unlike the bar strength, galaxy mass does seem to affect the properties of the HII regions, with massive galaxies presenting higher values in most of the properties, possibly due to the increased amount of gas in these systems. This study provides evidence that the bar-driven redistribution of material within the galaxy inner parts causes significant differences in the HII region properties depending on their location within the galaxies.2026MNRAS.545f2029Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/545/F2029CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/545/F2029https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/545/F2029http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/545/F2029https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/545/F2029https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/545/F2029http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/545/F2029GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/545/F2029/hiicat (Catalogue of HII regions in TIMER survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/545/F2029/hiicat?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/545/F2029/hiicat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/545/F2029/hiicat?GETtext/xml+votable180.050000true334.123-21.43110.0055555555555555566/16531 24957 25788 26303 26472 27514 34343 34531 35691 35993 36261 43881 44660 45905 46399 47456 48464https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/545/F2029?format=asciiOpticaldefaultJ/MNRAS/545/F2029/hiicatCatalogue of HII regions in TIMER surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRegionIDHII region ID, including the name of the host galaxymeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainRadRadius of the HII regionpixphys.angSize;srcfloatEnvEnvironment in which the HII is located (circumnuclear region, bar, inner disc, outer disc)src.classcharFHbeta? Hbeta flux1e-20mW.m**-2phot.flux;spect.linedoublenullablee_FHbeta? Hbeta flux error1e-20mW.m**-2stat.errordoublenullableF[OIII]4959? [OIII4959] flux1e-20mW.m**-2phot.fluxdoublenullablee_F[OIII]4959? [OIII4959] flux error1e-20mW.m**-2stat.errordoublenullableEWHaHalpha equivalent width0.1nmspect.line.eqWidthfloatF[OIII]5007? [OIII5007] flux1e-20mW.m**-2phot.fluxdoublenullablee_F[OIII]5007? [OIII5007] flux error1e-20mW.m**-2stat.errordoublenullableF[NII]6548? [NII6548] flux1e-20mW.m**-2phot.fluxdoublenullablee_F[NII]6548? [NII6548] flux error1e-20mW.m**-2stat.errordoublenullableFHalphaHalpha flux1e-20mW.m**-2phot.flux;spect.linedoublee_FHalphaHalpha flux error1e-20mW.m**-2stat.errordoubleF[NII]6583? [NII6583] flux1e-20mW.m**-2phot.fluxdoublenullablee_F[NII]6583? [NII6583] flux error1e-20mW.m**-2stat.errordoublenullableF[SII]6717? [SII6717] flux1e-20mW.m**-2phot.fluxdoublenullablee_F[SII]6717? [SII6717] flux error1e-20mW.m**-2stat.errordoublenullableF[SII]6731? [SII6731] flux1e-20mW.m**-2phot.fluxdoublenullablee_F[SII]6731? [SII6731] flux error1e-20mW.m**-2stat.errordoublenullablesigmaHaHalpha velocity dispersionkm/sphys.veloc.dispersion;spect.linefloate_sigmaHaHalpha velocity dispersion errorkm/sstat.errorfloate_EWHaHalpha equivalent width error0.1nmstat.errorfloatlogSigmaMassStellar mass surface densitylog(solMass.pc**-2)phys.densityfloat12logOH? Oxygen abundance from the Scal prescription (Pilyugin et al., 2016MNRAS.457.3678P)phys.abundfloatnullablee_12logOH? Error on the oxygen abundancestat.errorfloatnullablelogNO? N/O ratio from the N2S2 prescription (Florido et al., 2022MNRAS.513.2006F)phys.abundfloatnullablee_logNO? Error on the N/O ratiostat.errorfloatnullableAV? V-band dust attenuation from the Balmer decrement assuming the Cardelli et al. (1989ApJ...345..245C) extinction curve with RV=3.1magphys.absorptionfloatnullablee_AV? Error on the V-band dust attenuationmagstat.errorfloatnullablelogLHa? Dust-corrected Halpha luminositylog(1e-07W)phys.luminosity;em.line.Halphafloatnullablee_logLHa? Error on the dust-corrected Halpha luminositylog(1e-07W)stat.errorfloatnullable