J/MNRAS/484/5192ivo://CDS.VizieR/J/MNRAS/484/5192doi:10.26093/cds/vizier.74845192CDSChown R.Li C.Athanassoula E.Li N.Wilson C.D.Lin L.Mo H.,Parker L.C.Xiao T.2024-08-19T20:16:54Z2022-10-10T14:17:56ZCDS support team

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

cds-question@unistra.frgalaxiesmolecular-physicsstar-forming-regionsline-intensitiesco-line-emissionWe study the spatially resolved star formation history (SFH) and molecular gas distribution of 58 nearby galaxies, using integral field spectroscopy from the CALIFA survey and CO J=1-0 intensity mapping from the CARMA EDGE survey. We use the 4000{AA} break (D_n_(4000)), the equivalent width (EW) of the H{delta} absorption line (EW(H{delta}_A_)), and the EW of the H{alpha} emission line (EW(H{alpha})) to measure the recent SFH of these galaxies. We measure radial profiles of the three SFH indicators and molecular gas mass surface density, from which we measure the level of centrally enhanced star formation and the molecular gas concentration. When we separate our galaxies into categories of barred (17 galaxies), unbarred (24 galaxies), and merging/paired (17 galaxies), we find that the galaxies that have centrally enhanced star formation (19/58) are either barred (13/19) or in mergers/pairs (6/19) with relatively high molecular gas concentrations. A comparison between our barred galaxies and a snapshot of a hydrodynamic N-body simulation of a barred galaxy shows that the current theory of bar formation and evolution can qualitatively reproduce the main features of the observed galaxies in our sample, including both the sharp decrease of stellar age in the galactic centre and the gradual decrease of age with increasing distance from centre. These findings provide substantial evidence for a picture in which cold gas is transported inwards by a bar or tidal interaction, which leads to the growth and rejuvenation of star formation in the central region.2019MNRAS.484.5192Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/484/5192CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/484/5192https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/484/5192http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/484/5192https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/484/5192https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/484/5192http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/484/5192GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/484/5192/tablea1 (Basic properties of the galaxies in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/484/5192/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/484/5192/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/484/5192/tablea1?GETtext/xml+votable180.050000true20.662234.43710.0055555555555555566/2254 2273 2290 4178 4342 4454 4843 4950 5332 5593 7309 7340 7824 8498 8522 8552 8557 8563 8743 9124 9216 9220 9381 9622 9718 9882-9883 9885 10025 10280 10380-10381 10515 10566 10583 10612 10705 10739-10740 10778 10987 11070 11164 11374 11832 11944 18779 20417 26495 28322 28458 28491 28513 28617 31642 32462https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/484/5192?format=asciiRadiodefaultJ/MNRAS/484/5192/tablea1Basic properties of the galaxies in our sampleSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharf_Name[ABM] Flag on Name (1)meta.codecharNumber[1/58] Index of each galaxy in our samplemeta.idintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainzRaw redshift measured from the CALIFA datacubessrc.redshiftfloatNUV-r? NUV-r magnitude from the NASA-Sloan Atlasmagphot.color;em.UV;em.optfloatnullablelogMstarStellar mass from CALIFA DR3 reanalysis of SDSS DR7 ugriz growth curves (Walcher et al. 2014A&A...569A...1W)log(solMass)phys.massfloatr50r-band half-light radius r50 from the NSAarcsecphys.angSize;srcfloatlogMHI? Neutral hydrogen mass from ALFALFA 100% catalogue (Haynes et al. 2018ApJ...861...49H, Cat. J/ApJ/861/49) where available, or from the HyperLeda data baselog(solMass)phys.massfloatnullablelogMH2The total detected H2 mass in the whole CO imagelog(solMass)phys.massfloate_logMH2Error on logMH2log(solMass)stat.errorfloatTypeThe morphological type (RC3) provided in CALIFA DR3src.morph.typecharJ/MNRAS/484/5192/tablea2Quantities derived from spatially resolved optical IFU and molecular gas mapsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharf_Name[ABM] Flag on Name (1)meta.codecharUpturn[Y/N] Indicates if this galaxy has an upturn in logEW(H{alpha})meta.codecharDDn4000Dn(4000) turnover strength (2)stat.fit.paramfloatDEWHdEW(H{delta}A) upturn strength (3)0.1nmstat.fit.paramDEWHaEW(H{alpha}) upturn strength (3)stat.fit.paramr50molMolecular gas half-mass radiusarcsecphys.angSize;srcfloatl_logcmolLimit flag on logcmolmeta.code.errorcharlogcmolMolecular gas concentration index (4)meta.code;spect.indexfloatlogtdepc? Molecular gas depletion time in the 'centre' (0.5kpc semimajor axis)yrtime.epochfloatnullablee_logtdepc? Error on logtdepcyrstat.errorfloatnullablelogtdepd? Molecular gas depletion time in the 'disc' (between 0.5kpc and r50)yrtime.epochfloatnullablee_logtdepd? Error on logtdepdyrstat.errorfloatnullablelogtc/td? Centre-to-disc depletion time ratiotime.epochfloatnullablee_logtc/td? Error on logtc/tdstat.errorfloatnullable