J/ApJ/720/723ivo://CDS.VizieR/J/ApJ/720/723doi:10.26093/cds/vizier.17200723CDSTaylor E.N.Franx M.Glazebrook K.Brinchmann J.van der Wel A.,van Dokkum P.G.2012-08-01T14:07:30Z2012-07-13T07:18:06ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomysloan-photometrygalaxy-kinematicsWe set out to test the claim that the recently identified population of compact, massive, and quiescent galaxies at z~2.3 must undergo significant size evolution to match the properties of galaxies found in the local universe. Using data from the Sloan Digital Sky Survey (SDSS; Data Release 7), we have conducted a search for local red sequence galaxies with sizes and masses comparable to those found at z~2.3. The SDSS spectroscopic target selection algorithm excludes high surface brightness objects; we show that this makes incompleteness a concern for such massive, compact galaxies, particularly for low redshifts (z<~0.05). We have identified 63 M_*_>10^10.7^M_{sun}_ (~5x10^10^M_{sun}_) red sequence galaxies at 0.066<z_spec_<0.12 which are smaller than the median size-mass relation by a factor of 2 or more. Consistent with expectations from the virial theorem, the median offset from the mass-velocity dispersion relation for these galaxies is 0.12 dex. We do not, however, find any galaxies with sizes and masses comparable to those observed at z~2.3, implying a decrease in the comoving number density of these galaxies, at fixed size and mass, by a factor of >~5000. This result cannot be explained by incompleteness: in the 0.066<z<0.12 interval, we estimate that the SDSS spectroscopic sample should typically be >~75% complete for galaxies with the sizes and masses seen at high redshift, although for the very smallest galaxies it may be as low as ~20%. In order to confirm that the absence of such compact massive galaxies in SDSS is not produced by spectroscopic selection effects, we have also looked for such galaxies in the basic SDSS photometric catalog, using photometric redshifts. While we do find signs of a slight bias against massive, compact galaxies, this analysis suggests that the SDSS spectroscopic sample is missing at most a few objects in the regime we consider.2010ApJ...720..723Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/720/723CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)J/MNRAS/398/1129 : Central galaxies in groups and clusters (Guo+, 2009)J/MNRAS/382/109 : Massive galaxies in Extended Groth Strip (Trujillo+, 2007)J/ApJS/166/526 : Compact extragalactic radio sources (Xu+, 2006)J/A+A/330/423 : Early-type galaxies kinematics (Rampazzo+ 1998)http://www.sdss.org/ : SDSS home pagehttp://www.ipac.caltech.edu/2mass/ : 2MASS home page at IPAChttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/720/723https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/720/723http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/720/723https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/720/723https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/720/723http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/720/723GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/720/723/table1 (Properties of our compact galaxy candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/720/723/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/720/723/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/720/723/table1?GETtext/xml+votable180.050000true190.1665213.815630.0055555555555555566/4213 4314 4336 4383 4488 5030 5286 5723 5774 5820 5954 6143 6262 6410 6489 7344 7407 7469 8245 8327 8516 8639 8970 9007 9050 9076 9152 9257 9284 9286 9354 9736 10289 10403 10594 10877 10942 11812 16893 17570 18007 18387 18771 19056 21847 22001 23058 26173 26318 26347 26985 27285 27781 27839 27919 27940 27984 28154 28440 28623 31396 31467 32441https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/720/723?format=asciiOpticaldefaultJ/ApJ/720/723/table1Properties of our compact galaxy candidatesSDSSSDSS-DR7 IAU namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension in decimal degrees (J2000) (1)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (1)degpos.eq.dec;meta.mainzSDSS-DR7 spectroscopic redshift (1)src.redshiftfloat(u-r)oObserved SDSS (u-r) color index (1)magphot.color;em.opt.U;em.opt.Rfloat(u-r)cRest-frame corrected SDSS (u-r) color indexmagphot.color;em.opt.U;em.opt.RfloatlogMLog stellar mass (2)log(solMass)phys.massfloatRdevApparent De Vaucouleurs effective radius (1)arcsecphys.angSize;srcfloatnSersic indexstat.fit.paramfloatRserApparent Sersic effective radius (3)arcsecphys.angSize;srcfloatReffPhysical De Vaucouleurs effective radiuskpcphys.size.radiusfloatsigmaVelocity dispersion (2)km/sphys.veloc.dispersionintf_T[-] -: DR7 object that does not appear in DR4meta.codecharT? Luminosity-weighted age (4)Gyrtime.agefloatnullablef_Z[-] -: DR7 object that does not appear in DR4meta.codecharZ? Mean metallicity (4)phys.abund.Z;stat.meanfloatnullableSloanDisplay the SDSS online data for this galaxymeta.ref.urlchar