J/ApJ/762/77ivo://CDS.VizieR/J/ApJ/762/77doi:10.26093/cds/vizier.17620077CDSPoggianti B.M.Calvi R.Bindoni D.D'Onofrio M.Moretti A.,Valentinuzzi T.Fasano G.Fritz J.De Lucia G.Vulcani B.Bettoni D.,Gullieuszik M.Omizzolo A.2017-10-09T13:33:51Z2014-10-17T09:30:22ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopygalaxy-classification-systemsWe search for massive and compact galaxies (superdense galaxies, hereafter SDGs) at z=0.03-0.11 in the Padova-Millennium Galaxy and Group Catalogue (PM2GC), a spectroscopically complete sample representative of the general field population of the local universe. We find that compact galaxies with radii and mass densities comparable to high-z massive and passive galaxies represent 4.4% of all galaxies with stellar masses above 3x10^10^M_{sun}_, yielding a number density of 4.3x10^-4^h^3^/Mpc^3^. Most of them are S0s (70%) or ellipticals (23%), are red, and have intermediate-to-old stellar populations, with a median luminosity-weighted age of 5.4Gyr and a median mass-weighted age of 9.2Gyr. Their velocity dispersions and dynamical masses are consistent with the small radii and high stellar mass estimates. Comparing with the WINGS sample of cluster galaxies at similar redshifts, the fraction of SDGs is three times smaller in the field than in clusters, and cluster SDGs are on average 4Gyr older than field SDGs. We confirm the existence of a universal trend of smaller radii for older luminosity-weighted ages at fixed galaxy mass. As a consequence, the median mass-size relation shifts toward smaller radii for galaxies with older stars, but the effect is much more pronounced in clusters than in the field. Our results show that, on top of the well-known dependence of stellar age on galaxy mass, the luminosity-weighted age of galaxies depends on galaxy compactness at fixed mass and, for a fixed mass and radius, on environment. This effect needs to be taken into account in order not to overestimate the evolution of galaxy sizes from high to low z. Our results and hierarchical simulations suggest that a significant fraction of the massive compact galaxies at high z have evolved into compact galaxies in galaxy clusters today. When stellar age and environmental effects are taken into account, the average amount of size evolution of individual galaxies between high and low z is mild, a factor ~1.6.2013ApJ...762...77Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/762/77CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)VII/240 : Millennium Galaxy Catalogue (Liske+, 2003)J/MNRAS/420/926 : Morphology of galaxies in WINGS clusters (Fasano+, 2012)J/MNRAS/416/727 : Padova-Millennium Galaxy and Group Catalogue (Calvi+, 2011)J/MNRAS/413/813 : ATLAS3D project. I. (Cappellari+, 2011)J/A+A/526/A45 : WINGS-SPE II catalog (Fritz+, 2011)J/ApJ/739/L44 : Structural data for 0.2<z<2.7 galaxies (Damjanov+, 2011)J/AJ/130/1516 : MCG pairs and triples of galaxies (De Propris+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/762/77https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/762/77http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/762/77https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/762/77https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/762/77http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/762/77GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/762/77/table5 (Superdense galaxies at low redshift)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/762/77/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/762/77/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/762/77/table5?GETtext/xml+votable180.050000true215.9539-0.248320.0055555555555555565/6489 6506 6550 6554 6565 6566 6570 6746 6757 6762 6805 6806 6809 6/25599 25919 25935 25944 25946 25955 25960 25961 25962 25964 25968 26004 26005 26006 26009 26010 26012 26019 26020 26021 26022 26028 26048 26175 26195 26196 26197 26198 26204 26212 26213 26214 26220 26224 26255 26259 26275 26276 26277 26278 26284 26288 26368 26879 26943 26959 26963 26965 26966 26967 26969 26970 26971 26972 26979 26980 26981 26982 26988 27027 27033 27034 27035 27043 27044 27045 27046 27056 27072 27215 27219 27228 27248 27392 27648https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/762/77?format=asciiOpticaldefaultJ/ApJ/762/77/table5Superdense galaxies at low redshiftrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMGC[71/96964] PM2GC ID number (1)meta.id;meta.mainintzBest (spectroscopic) redshift from Millenium Galaxy catalogue (MGC: Liske+, 2003, VII/240)src.redshift;pos.heliocentricfloatReGalaxy major axis radius (1pix=0.333arcsec)pixphys.angSizefloatn[0.5/8] Sersic indexstat.fit.paramfloatb/a[0.1/1.3] Axial ratiophys.angSize;arith.ratiofloatMDetails from MGC (Liske+, 2003, VII/240) and (when M>1) the PM2GC (Calvi et al. 2011, J/MNRAS/416/727) catalogsmeta.numberintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharNEDSimbad column added by the CDSmeta.refchar_RAPositions from Millennium Galaxy Catalogue (MGC, Cat. VII/240) (right ascension part)degpos.eq.ra;meta.main_DEPositions from Millennium Galaxy Catalogue (MGC, Cat. VII/240) (declination part)degpos.eq.dec;meta.main