J/A+A/696/A22ivo://CDS.VizieR/J/A+A/696/A22doi:10.26093/cds/vizier.36960022CDSZamora S.Diaz A.I.Terlevich R.Terlevich E.Amorin R2025-06-02T20:01:12Z2025-03-28T07:42:50ZCDS support team

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

cds-question@unistra.frh-ii-regionsspectroscopyline-intensitiesIn this third paper in a series, we study the kinematics of the ionised gas and stars, and calculated the dynamical masses of the circumnuclear star-forming regions in the ring of the face-on spiral NGC 7742. We have used high spectral resolution data from the MEGARA instrument attached to the Gran Telescopio Canarias (GTC) to measure the kinematical components of the nebular emission lines of selected HII regions and the stellar velocity dispersions from the CaT absorption lines that allow the derivation of the associated cluster virialized masses. The emission line profiles show two different kinematical components: a narrow one with a velocity dispersion of ~10km/s and a broad one with a velocity dispersion similar to the values found for the stellar absorption lines. The derived star cluster dynamical masses range from 2.5x10^6^ to 10.0x10^7^M_{sun}_. The comparison of gas and stellar velocity dispersions suggests a scenario where the clusters have formed simultaneously in a first star formation episode with a fraction of the stellar evolution feedback remaining trapped in the cluster, subject to the same gravitational potential as the cluster stars. Between 0.15 and 7.07% of the total dynamical mass of the cluster would have cooled down and formed a new, younger, population of stars, responsible for the ionisation of the gas currently observed.2025A&A...696A..22Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/696/A22CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/696/A22https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/696/A22http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/696/A22https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/696/A22https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/696/A22http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/696/A22GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/696/A22/table3Emission line radial velocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRegionRegion ID (R1/R88)meta.id;obs.fieldcharCompComponentmeta.code.multipcharvHaH{alpha} velocitykm/sspect.dopplerVelocfloate_vHaH{alpha} velocity errorkm/sstat.errorfloatv[NII]? [NII] 6584{AA} line velocitykm/sspect.dopplerVelocfloatnullablee_v[NII]? [NII] 6584{AA} line velocity errorkm/sstat.errorfloatnullablev[SII]? [SII] 6717{AA} line velocitykm/sspect.dopplerVelocfloatnullablee_v[SII]? [SII] 6717{AA} line velocity errorkm/sstat.errorfloatnullablev[SIII]? [SIII] 9535{AA} line velocitykm/sspect.dopplerVelocfloatnullablee_v[SIII]? [SIII] 9535{AA} line velocity errorkm/sstat.errorfloatnullableJ/A+A/696/A22/table4Emission line velocity dispersionsCompComponentmeta.code.multipcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRegionRegion ID (R1/R88)meta.id;obs.fieldcharsigmaHaH{alpha} velocity dispersionkm/sphys.veloc.dispersion;spect.linefloate_sigmaHaH{alpha} velocity dispersion errorkm/sstat.errorfloatsigma[NII]? [NII] 6584{AA} line velocity dispersionkm/sphys.veloc.dispersionfloatnullablee_sigma[NII]? [NII] 6584{AA} line velocity dispersion errorkm/sstat.errorfloatnullablesigma[SII]? [SII] 6717{AA} line velocity dispersionkm/sphys.veloc.dispersionfloatnullablee_sigma[SII]? [SII] 6717{AA} line velocity dispersion errorkm/sstat.errorfloatnullablesigma[SIII]? [SIII] 9535{AA} line velocity dispersionkm/sphys.veloc.dispersionfloatnullablee_sigma[SIII]? [SIII] 9535{AA} line velocity dispersion errorkm/sstat.errorfloatnullableJ/A+A/696/A22/table5Equivalent widths of stellar absorption lines of the observed CNSFRsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRegionRegion ID (R1/R88)meta.id;obs.fieldcharEW(CaII)CaII (8542{AA}+8662{AA}+8498{AA}) equivalent width0.1nmspect.line.eqWidthfloatEW(MgI)MgI equivalent width0.1nmspect.line.eqWidthfloate_EW(CaII)CaII (8542{AA}+8662{AA}+8498{AA}) equivalent width error0.1nmstat.errorfloate_EW(MgI)MgI equivalent width error0.1nmstat.errorfloat