J/ApJ/937/117ivo://CDS.VizieR/J/ApJ/937/117doi:10.26093/cds/vizier.19370117CDSFraser-McKelvie A.Cortese L.2023-10-16T11:51:19Z2023-03-27T11:11:47ZCDS support team

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

cds-question@unistra.frgalaxiesgalaxy-classification-systemsIt is generally assumed that galaxies are a bimodal population in both star formation and structure; star-forming galaxies are disks, while passive galaxies host large bulges or are entirely spheroidal. Here we test this scenario by presenting a full census of the kinematic morphologies of a volume-limited sample of galaxies in the local universe extracted from the MaNGA galaxy survey. We measure the integrated stellar line-of-sight velocity to velocity dispersion ratio (V/sigma) for 4574 galaxies in the stellar mass range 9.75<logM*[M_{sun}]<11.75. We show that at fixed stellar mass, the distribution of V/sigma is not bimodal, and that a simple separation between fast and slow rotators is oversimplistic. Fast rotators are a mixture of at least two populations, referred to here as dynamically cold disks and intermediate systems, with disks dominating in both total stellar mass and number. When considering star-forming and passive galaxies separately, the star-forming population is almost entirely made up of disks, while the passive population is mixed, implying an array of quenching mechanisms. Passive disks represent ~30% (both in number and mass) of passive galaxies, nearly a factor of two higher than that of slow rotators, reiterating that these are an important population for understanding galaxy quenching. These results paint a picture of a local universe dominated by disky galaxies, most of which become somewhat less rotation-supported upon or after quenching. 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workrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintplateifuMaNGA plate-ifu identifier (NNNNN-NNNNN) (plateifu)obs.fieldcharMaNGAMaNGA ID (NN-NNNNNN) (mangaid)meta.id;meta.maincharRAJ2000MaNGA right ascension (J2000) (objra)degpos.eq.ra;meta.mainDEJ2000MaNGA declination (J2000) (objdec)degpos.eq.dec;meta.mainObslrObserved lambda_Re, stellar spin parameter within 1Re (uncorrected) (obs_lr)em.wlfloatObsVsigObserved V/sigma uncorrected (obs_vsig)phys.velocfloatPSFCorrlrlambda_Re, stellar spin parameter within 1Re, PSF-corrected (psfcorr_lr)em.wlfloatPSFcorrVsigV/sigma PSF-corrected (psfcorr_vsig)phys.velocfloatVsigPSFcorrDeprojV/sigma PSF-corrected and deprojected (vsig_psfcorr_deproj)phys.velocfloatlrPSFcorrDeprojlambda_Re, stellar spin parameter within 1Re, PSF-corrected and deprojected (lamr_psfcorr_deproj)em.wlfloatlogMstarlog stellar mass from GSWLC (logMstar) (1)log(solMass)phys.massdoublelogSEDSFRlog SFR from GSWLC (logSEDSFR) (1)log(solMass.yr**-1)phys.SFRdouble