J/MNRAS/499/1406ivo://CDS.VizieR/J/MNRAS/499/1406doi:10.26093/cds/vizier/bg-fk-1byCDSLin L.Li C.Du C.Wang E.Xiao T.Bureau M.Fraser-McKelvie A.,Masters K.Lin L.Wake D.Hao L.2026-08-03T07:30:17Z2023-11-07T09:09:07ZCDS support team

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

cds-question@unistra.frgalaxiesstar-forming-regionsline-intensitiesvisible-astronomyspectroscopyWe analyse two-dimensional maps and radial profiles of EW(H{alpha}), EW(H{delta}_A_), and D_n_(4000) of low-redshift galaxies using integral field spectroscopy from the MaNGA survey. Out of ~1400 nearly face-on late-type galaxies with a redshift z<0.05, we identify 121 "turnover" galaxies that each have a central upturn in EW(H{alpha}), EW(H{delta}_A_), and/or a central drop in D_n_(4000), indicative of ongoing/recent star formation. The turnover features are found mostly in galaxies with a stellar mass above ~10^10^M_{sun}_ and NUV-r colour less than ~5. The majority of the turnover galaxies are barred, with a bar fraction of 89+/-3 per cent. Furthermore, for barred galaxies, the radius of the central turnover region is found to tightly correlate with one-third of the bar length. Comparing the observed and the inward extrapolated star formation rate surface density, we estimate that the central SFR have been enhanced by an order of magnitude. Conversely, only half of the barred galaxies in our sample have a central turnover feature, implying that the presence of a bar is not sufficient to lead to a central SF enhancement. We further examined the SF enhancement in paired galaxies, as well as the local environment, finding no relation. This implies that the environment is not a driving factor for central SF enhancement in our sample. Our results reinforce both previous findings and theoretical expectation that galactic bars play a crucial role in the secular evolution of galaxies by driving gas inflow and enhancing the star formation and bulge growth in the centre.2020MNRAS.499.1406Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/499/1406CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/154/86 : MaNGA catalog, DR15 (Wake+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/499/1406https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/499/1406http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/499/1406https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/499/1406https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/499/1406http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/499/1406GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/499/1406/table2 (Measurements of barred galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/499/1406/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/499/1406/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/499/1406/table2?GETtext/xml+votable180.050000true57.7295833-7.0606350.005555555555555556Cone search capability for table J/MNRAS/499/1406/table3 (Turnover property measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/499/1406/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/499/1406/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/499/1406/table3?GETtext/xml+votable180.050000true57.7295833-7.0606350.0055555555555555566/640 4661 4719 4730 4747-4748 4758 4764 4794-4795 4827 4854 4858 4861 4919-4920 4937 4962 4964 4992 5009 5028 5117 5351 5530 5533 5552 5558 5564 5594 5604 5607 5617-5618 5620 5639 5671 5680 5715 5752 5798 5800 5816 5840-5841 5862 5867 5888 5918-5919 5957-5959 6233 6236 6256 6260 6262-6264 6396 6528 6534 6544-6545 6564 6576 6578 6583-6584 6587 6599 6604-6606 6633 6639 6654 6740 6913 6930 6933 7184 7232 7320-7321 7339 7368-7370 8700 8702 9029 9071 9258 9260-9261 9265 9341 9345 9366-9367 9369 9371 9374 9418 9462 9465 9467-9468 9470-9471 9484 9508 9605 9638 9642 9647 9785 9807 9809 9814 9830 9851 9878 9891 9901 9909 9923 9936 9946 9986 9990 9998 10022 10024 10062-10063 10104 10113 10182-10183 10192 10201 10256 10259 10261 10263 10267 10269-10270 10292-10293 10295 10349 10376 10378-10380 10393 10398-10399 10428 10437-10438 10443 10493 10621 10658 10663 10668 10675 10700 10927 10949-10950 10954-10955 11041 11043-11044 11273 11297 11301 11312 11323 11349 11396 11399 11406 11432 11598 12392 17747 17750 19385 23047 23051 23101 23144 23186 23192 23194 23196 23201 23205 23208 23212 23216 23233 28149 28271 28282 28358 28362-28363 28366 28630 28636 28638 32508 32672 32680https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/499/1406?format=asciiOpticaldefaultJ/MNRAS/499/1406/table2Measurements of barred galaxiesSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDMaNGA identifiermeta.id;meta.maincharrbarBar lengtharcsecphys.angSize;srcfloate_rbarError on rbararcsecstat.errorfloatebarBar ellipticitysrc.ellipticityfloate_ebarError on ebarstat.errorfloatPAbarBar position angledegpos.posAngfloate_PAbarError on PAbardegstat.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.mainJ/MNRAS/499/1406/table3Turnover property measurementsSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDMaNGA identifiermeta.id;meta.maincharRtTurnover radius R_t_arcsecphys.angSize;srcfloate_RtError on Rtarcsecstat.errorfloatDEWHa? Logarithm of the EW_H{alpha}_ enhancementlog(0.1nm)spect.line.eqWidthnullablee_DEWHa? Error on DEWHalog(0.1nm)stat.errorfloatnullableDEWHdEW_H{delta}_ enhancement0.1nmspect.line.eqWidthe_DEWHdError on DEWHd0.1nmstat.errorfloatDDn4000D_n_(4000) dropspect.indexfloate_DDn4000Error on DDn4000stat.errorfloatDlogSFR? Logarithm of the star formation rate enhancement within turnover radiuslog(solMass.yr**-1)phys.SFRfloatnullablee_DlogSFR? Error on DlogSFRlog(solMass.yr**-1)stat.errorfloatnullable_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