J/ApJ/835/104ivo://CDS.VizieR/J/ApJ/835/104doi:10.26093/cds/vizier.18350104CDSvan de Sande J.Bland-Hawthorn J.Fogarty L.M.R.Cortese L.,D'Eugenio F.Croom S.M.Scott N.Allen J.T.Brough S.Bryant J.J.,Cecil G.Colless M.Couch W.J.Davies R.Elahi P.J.Foster C.,Goldstein G.Goodwin M.Groves B.Ho I.-T.Jeong H.Jones D.H.,Konstantopoulos I.S.Lawrence J.S.Leslie S.K.Lopez-Sanchez A.R.,McDermid R.M.McElroy R.Medling A.M.Oh S.Owers M.S.Richards S.N.,Schaefer A.L.Sharp R.Sweet S.M.Taranu D.Tonini C.Walcher C.J.,Yi S.K.2018-03-12T08:29:18Z2017-11-29T08:47:17ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopysurveysredshiftedgalaxy-classification-systemsRecent cosmological hydrodynamical simulations suggest that integral field spectroscopy can connect the high-order stellar kinematic moments h_3_ (~skewness) and h_4_ (~kurtosis) in galaxies to their cosmological assembly history. Here, we assess these results by measuring the stellar kinematics on a sample of 315 galaxies, without a morphological selection, using two-dimensional integral field data from the SAMI Galaxy Survey. Proxies for the spin parameter ({lambda}R_e_) and ellipticity ({epsilon}_e_) are used to separate fast and slow rotators; there exists a good correspondence to regular and non-regular rotators, respectively, as also seen in earlier studies. We confirm that regular rotators show a strong h_3_ versus V/{sigma} anti-correlation, whereas quasi-regular and non-regular rotators show a more vertical relation in h_3_ and V/{sigma}. Motivated by recent cosmological simulations, we develop an alternative approach to kinematically classify galaxies from their individual h_3_ versus V/{sigma} signatures. Within the SAMI Galaxy Survey, we identify five classes of high-order stellar kinematic signatures using Gaussian mixture models. Class 1 corresponds to slow rotators, whereas Classes 2-5 correspond to fast rotators. We find that galaxies with similar {lambda}R_e_-{epsilon}_e_ values can show distinctly different h_3_-V/{sigma} signatures. Class 5 objects are previously unidentified fast rotators that show a weak h_3_ versus V/{sigma} anti-correlation. From simulations, these objects are predicted to be disk-less galaxies formed by gas-poor mergers. From morphological examination, however, there is evidence for large stellar disks. Instead, Class 5 objects are more likely disturbed galaxies, have counter-rotating bulges, or bars in edge-on galaxies. Finally, we interpret the strong anti-correlation in h_3_ versus V/{sigma} as evidence for disks in most fast rotators, suggesting a dearth of gas-poor mergers among fast rotators.2017ApJ...835..104Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/835/104CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006)J/MNRAS/404/1639 : MILES base models & new line index system (Vazdekis+, 2010)J/MNRAS/413/813 : ATLAS3D project. I. (Cappellari+, 2011)J/MNRAS/416/1680 : ATLAS3D project. VII. (Cappellari+, 2011)J/MNRAS/413/971 : Galaxy And Mass Assembly (GAMA) DR1 (Driver+, 2011)J/MNRAS/414/888 : ATLAS3D project. III. (Emsellem+, 2011)J/A+A/556/A55 : Multi-color photom. of star-forming galaxies (Ilbert+, 2013)J/ApJ/777/18 : Stellar mass functions of galaxies to z=4 (Muzzin+, 2013)J/ApJ/771/85 : Dynamical masses of z~2 quiescent gal. (van de Sande+, 2013)J/MNRAS/446/1567 : SAMI Galaxy Survey: Early Data Release (Allen+, 2015)J/MNRAS/454/2050 : SAMI Pilot Survey (Fogarty+, 2015)J/MNRAS/452/2087 : Galaxy And Mass Assembly (GAMA): DR2 (Liske+, 2015)J/A+A/591/A143 : NGC 3115 MUSE images (Guerou+, 2016)J/MNRAS/456/1299 : SAMI Galaxy Survey: gas streaming (Cecil+, 2016)http://sami-survey.org/ : SAMI Galaxy Survey websitehttp://www.gama-survey.org/ : Galaxy And Mass Assembly (GAMA) home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/835/104https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/835/104http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/835/104https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/835/104https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/835/104http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/835/104GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/835/104/gal (Compilation of all measured quantities and log-likehood estimates and high-order classification for the SAMI galaxies (tables 2 and 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/835/104/gal?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/835/104/gal?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/835/104/gal?GETtext/xml+votable180.050000true182.63585750.67750110.0055555555555555565/5469 6/4096 4102 4104 4112 21845 21846 21847 21852 21853 21855 21872 25596 25597 25915 25931 25936 25939 25942 25952 25954 25957 25958 25959 25962 25965 25966 25968 26001 26048 26049 26051 26254 26274 26275 26276 26277 26284 26286 26291 26951 26959 26960 26965 26973 27279 27300 27303 27311 27314 27315 27648 27649 27650 27652 27654https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/835/104?format=asciiOpticaldefaultJ/ApJ/835/104/galCompilation of all measured quantities and log-likehood estimates and high-order classification for the SAMI galaxies (tables 2 and 3)SimbadNameSimbad column added by the CDSmeta.idcharzsp[0.01/0.09] Spectroscopic redshiftsrc.redshiftfloatg-i[0.7/1.4] g-i color indexmagphot.colorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[8487/9403801368] Catalog ID (CATID) (G1)meta.id;meta.tablelogM*[10/11.6] Log stellar masslog(solMass)phys.massfloatRe[0.8/15.8] Effective semi-major axiskpcphys.size.radiusfloatellEllipticitysrc.ellipticityfloatrmaxSig[0.3/3.6] Maximum aperture radius velocity dispersion, normalised by Restat.fit.omcfloatrmaxh3[0.1/1.5] Maximum aperture radius h3, normalised by Restat.fit.omcfloatlamRe[0.03/0.7]? Spin parameter proxy within one Restat.fit.paramfloatnullablee_lamRe[0.002/0.02]? Error on lamRestat.errorfloatnullable<k5k1Re>[0.007/2]? Mean kinemetry k5/k1 value within one Restat.value;stat.meandoublenullablee_<k5k1Re>[0.002/612]? Error on <k5k1Re>stat.errordoublenullableSigamaj[0.03/1] Best-fit standard deviation along major axis of high-order data ({sigma}_major_)stat.stdevfloatSigmbmin[0.02/0.07] Best-fit standard deviation along minor axis of high-order data ({sigma}_minor_)stat.stdevfloatphi[-45/5] Best-fit angle {Phi} of high-order datastat.fit.paramfloatCorr[-1/0.4] Pearson correlation coefficient of high-order datastat.fit.paramfloatCl[1/5] High-order stellar kinematic class (1)meta.code.classintEDRDisplay data from the Early Data Release of SAMI (Allen+, 2015, J/MNRAS/446/1567) if anymeta.ref.urlintnullableSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar_RAPositions from SAMI targets (http://sami-survey.org/data/target_catalogue) for ID<9008500007 (right ascension part)degpos.eq.ra;meta.mainnullable_DEPositions from SAMI targets (http://sami-survey.org/data/target_catalogue) for ID<9008500007 (declination part)degpos.eq.dec;meta.mainnullable