J/other/RAA/19.8ivo://CDS.VizieR/J/other/RAA/19.81doi:10.26093/cds/vizier/dx/bjkibCDSChen Y.-Y.Chen Y.-M.Gu Q.-S.Shi Y.Bing L.-J.Yu X.-L.2026-02-10T20:07:41Z2020-08-14T07:27:29ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomygalaxy-classification-systemsWe select 107 blue-core galaxies from the MaNGA survey, studying their morphology, kinematics as well as the gas-phase metallicity. Our results are as follows: (i) In our sample, 26% of blue-core galaxies have decoupled gas-star kinematics, indicating external gas accretion; 15% have bar-like structure and 8% show post-merger features, such as tidal tails and irregular gas/star velocity field. All these processes/features, such as accreting external misaligned gas, interaction and bar, can trigger gas inflow. Thus the central star-forming activities lead to bluer colors in their centers (blue-core galaxies). (ii) By comparing with the SDSS DR7 star-forming galaxy sample, we find that the blue-core galaxies have higher central gas-phase metallicity than what is predicted by the local mass-metallicity relation. We explore the origin of the higher metallicity, finding that not only the blue-core galaxies, but also the flat-gradient and red-core galaxies all have higher metallicity. This can be explained by the combined effect of redshift and galaxy color.2019RAA....19...81Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RAA/19.81CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/RAA/19.81https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/RAA/19.81http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/RAA/19.81https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/RAA/19.81https://vizier.iucaa.in/viz-bin/votable?-source=J/other/RAA/19.81http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/RAA/19.81GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/RAA/19.81/table1 (The blue-core galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/RAA/19.81/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/other/RAA/19.81/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/RAA/19.81/table1?GETtext/xml+votable180.050000true130.99640551.090268060.0055555555555555565/2367 6/4794 4825 4852 4919 4960 5116 5119 5368 5556 5558 5561 5604 5671 5757-5758 5798 5819 5830 5833 5845 5862 5868 5922 5954-5955 6214 6216 6271 6583 6585 6624 6626 6648 6654 6996 7175 7234 7301 7318 7368 8702 9029 9265 9267 9601 9632 9640 9788 9807 9813 9815 9828 9850 9902 9912 9943 9946 10099 10104 10377-10378 10400 10551 10593 10702 10911 10930 11044 11313 11347 11399 11406 11408 11426 11595 12399 17750 17755 18771 19096 19109 23146 23182-23183 23194 23204-23205 23218 28149 28319 28368 28384 28627 30044https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/RAA/19.81?format=asciiOpticaldefaultJ/other/RAA/19.81/table1The blue-core galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameMaNGA ID (1-NNNNNN)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainzRedshiftsrc.redshiftfloatlogM*Stellar masslog(solMass)phys.massfloatiInclination angledegsrc.orbital.inclination;pos.posAngintDPA? Difference in the kinematic PA between star and ionized gas which is defined as {DELTA}PA=|PA_star_-PA_gas_| (1)degpos.posAng;arith.diffintnullablee_DPA? rms uncertainty on DPAdegstat.errorintnullableMorphMorphologysrc.morphcharSimbadSimbad column added by the CDSmeta.ref.urlchar