J/ApJ/836/115ivo://CDS.VizieR/J/ApJ/836/115doi:10.26093/cds/vizier.18360115CDSOh S.Greene J.E.Lackner C.N.2020-01-29T13:59:18Z2017-10-23T10:33:25ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomysloan-photometryredshiftedgalaxy-classification-systemsastronomical-modelsWe investigate two-dimensional image decomposition of nearby, morphologically selected early-type galaxies (ETGs). We are motivated by recent observational evidence of significant size growth of quiescent galaxies and theoretical development advocating a two-phase formation scenario for ETGs. We find that a significant fraction of nearby ETGs show changes in isophotal shape that require multi-component models. The characteristic sizes of the inner and outer component are ~3 and ~15kpc. The inner component lies on the mass-size relation of ETGs at z~0.25-0.75, while the outer component tends to be more elliptical and hints at a stochastic buildup process. We find real physical differences between single- and double-component ETGs, with double-component galaxies being younger and more metal-rich. The fraction of double-component ETGs increases with increasing {sigma} and decreases in denser environments. We hypothesize that double-component systems were able to accrete gas and small galaxies until later times, boosting their central densities, building up their outer parts, and lowering their typical central ages. In contrast, the oldest galaxies, perhaps due to residing in richer environments, have no remaining hints of their last accretion episode.2017ApJ...836..115Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/836/115CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)J/AJ/101/1561 : Isophotometry of ellipticals in Abell clusters (Porter+ 1991)J/ApJS/142/1 : DEEP Groth Strip Survey. II. (Simard+, 2002)J/MNRAS/330/547 : Local galaxy ages and metallicities (Terlevich+, 2002)J/ApJS/182/216 : Surface photometry of Virgo ellipticals (Kormendy+, 2009)J/ApJS/186/427 : Detailed morphology of SDSS galaxies (Nair+, 2010)J/ApJ/720/723 : Compact galaxies in the local universe (Taylor+, 2010)J/ApJ/739/L44 : Structural data for gal. between 0.2<z<2.7 (Damjanov+, 2011)J/MNRAS/414/888 : ATLAS3D project. III. (Emsellem+, 2011)J/ApJS/203/24 : Structural parameters of gal. in CANDELS (van der Wel+, 2012)J/ApJ/775/106 : CANDELS passive and massive early-type gal. (Cassata+, 2013)J/ApJ/793/39 : Spectrosc. properties of BOSS compact gal. (Damjanov+, 2014)J/MNRAS/446/3943 : galaxies 2D phot. decompositions in SDSS-DR7 (Meert+, 2015)J/A+A/578/A134 : Compact early-type galaxies in SDSS (Saulder+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/836/115https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/836/115http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/836/115https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/836/115https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/836/115http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/836/115GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/836/115/table3 (Structural parameters of bestfit models)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/836/115/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/836/115/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/836/115/table3?GETtext/xml+votable180.050000true197.2087917-0.81731940.0055555555555555565/2367 6/526 544 545 547 549 552 4099 4145 4152 4155 4156 4170 4181 4183 4185 4187 4224 4355 4368 4369 4767 4769 4772 4811 4839 4971 4986 4987 4988 5004 5007 5010 5022 5037 5044 5054 5055 5061 5062 5063 5065 5069 5083 5086 5090 5097 5100 5103 5107 5358 5365 5373 5439 5462 5492 5493 5502 5515 5523 5528 5530 5538 5551 5555 5556 5563 5564 5567 5587 5590 5591 5597 5601 5606 5607 5608 5614 5621 5626 5655 5660 5661 5664 5666 5673 5677 5690 5699 5700 5701 5702 5713 5732 5743 5746 5789 5796 5799 5816 5824 5825 5826 5841 5851 5855 5886 5888 5889 5890 5895 5897 5900 5915 5918 5923 5929 5935 5957 5958 5967 5972 5977 5981 5982 5991 5996 6015 6024 6031 6033 6045 6052 6057 6074 6077 6078 6082 6085 6086 6089 6091 6095 6131 6161 6196 6215 6389 6393 6420 6422 6435 6441 6453 6478 6480 6481 6482 6484 6488 6489 6494 6497 6514 6530 6534 6541 6544 6546 6551 6552 6553 6564 6572 6579 6580 6582 6583 6601 6603 6605 6606 6611 7197 7223 7227 7228 7231 7237 7240 7244 7256 7266 7271 7274 7276 7277 7294 7298 7302 7303 7314 7315 7316 7319 7320 7322 7324 7360 7369 7444 7450 7451 7452 7454 7479 7480 7484 7488 7509 7517 7525 7529 8195 8203 8208 8210 8212 8736 8737 9071 9083 9174 9179 9193 9206 9232 9295 9303 9306 9311 9332 9335 9352 9368 9369 9370 9378 9396 9401 9403 9413 9419 9438 9441 9443 9445 9446 9464 9466 9467 9480 9504 9507 9607 9609 9612 9618 9632 9633 9636 9758 9764 9767 9792 9794 9796 9800 9806 9808 9811 9815 9818 9833 9834 9839 9840 9841 9872 9875 9889 9892 9920 9922 9923 9926 9933 9934 9938 9939 9944 9946 9948 9953 9955 9956 9958 9975 9979 9987 9988 10085 10092 10095 10120 10152 10182 10183 10188 10193 10194 10200 10202 10213 10215 10517 10525 10533 10544 10554 10580 10594 10612 10629 10631 10642 10664 10670 10673 10680 10683 10698 10718 10730 10750 10841 10851 10858 10917 10939 10940 10959 10965 10968 10972 10978 10983 10985 10994 10995 11005 11014 11016 11040 11044 11053 11064 11086 11098 11103 11111 11112 11115 11124 11133 11140 11143 11155 11179 11194 11199 11200 11221 11226 11231 11238 11241 11246 11276 11294 11312 11314 11327 11328 11329 11345 11348 11349 11369 11387 11405 11407 11415 11434 11436 11438 11441 11442 11457 11471 11489 11497 11501 11591 11784 11785 11788 11792 11798 11800 11805 11811 11813 11815 11828 11840 11849 11875 11876 11908 11912 11927 11948 12392 12400 16894 17150 17233 17237 17240 17242 17299 17303 17320 17498 17499 17500 17515 17570 17571 17575 17580 17662 17747 17750 17765 17770 17807 17815 17818 17821 17827 17829 17831 17832 17833 17983 17998 17999 18001 18003 18004 18008 18009 18017 18021 18032 18063 18066 18068 18071 18072 18075 18301 18303 18383 18396 18410 18411 18412 18521 18522 18536 18538 18587 18601 18607 18608 18612 18786 18788 18792 18794 18849 18850 18953 19007 19058 19091 19107 19112 19120 19432 19691 19694 19733 19735 19737 19755 19776 19777 19985 19986 19993 19995 20001 20002 20033 21846 21847 21967 21991 22719 23043 23047 23072 23073 23186 23202 23208 23211 23233 25565 25567 25581 25582 25586 25594 25839 25852 25853 25909 25917 25919 25923 25936 25942 25948 25950 25959 25974 25977 25981 25987 26001 26005 26027 26053 26064 26091 26158 26169 26172 26191 26202 26203 26220 26237 26245 26246 26263 26302 26311 26318 26323 26327 26345 26348 26350 26368 26374 26381 26389 26391 26498 26527 26548 26551 26569 26594 26945 26951 26955 26956 26958 26960 26977 26978 27000 27030 27038 27041 27045 27053 27059 27065 27066 27067 27068 27076 27082 27085 27086 27087 27109 27112 27115 27117 27122 27128 27225 27233 27235 27237 27242 27260 27279 27282 27292 27328 27329 27339 27340 27343 27346 27358 27370 27401 27413 27417 27423 27438 27439 27452 27453 27455 27460 27464 27467 27477 27481 27484 27486 27490 27507 27513 27521 27526 27531 27536 27544 27551 27566 27567 27571 27580 27583 27591 27603 27616 27617 27620 27622 27651 27669 27670 27671 27674 27678 27690 27698 27711 27752 27760 27770 27841 28161 28162 30036 31354 31376 31397 31400 31401 31402 31407 31458 31485 32430 32443 32447 32457 36729 36765 36766 36784 36788 36808 36810 45046 45047 45049 49130https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/836/115?format=asciiOpticaldefaultJ/ApJ/836/115/table3Structural parameters of bestfit modelsSimbadNameSimbad column added by the CDSmeta.idcharNameSDSS name (JHHMMSS.ss+DDMMSS.ss)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[0/1132] Unique sample IDmeta.idintRAdeg? Right Ascension in decimal degrees (J2000)degpos.eq.ranullableDEdeg? Declination in decimal degrees (J2000)degpos.eq.decnullablez[0.01/0.09] Spectroscopic redshiftsrc.redshiftfloatsigma[72/354] Velocity dispersionkm/sphys.veloc.dispersionintrMag[-22.9/-18.4]? Absolute r magnitudemagphys.magAbsfloatnullableg-r[0.5/0.9]? Rest frame g-r color indexmagphot.color;em.opt.B;em.opt.RfloatnullableFWHM[0.7/2.1] FWHM of the PSFarcsecinstr.det.psffloatnSer[1.4/9] Sersic index for Sersic modelstat.fit.paramfloateSer[0/0.6] Ellipticity for Sersic modelsrc.ellipticityfloatfSer[12/15.7] Flux for Sersic modelmagstat.paramfloatReSer[1.6/94] Effective radius for Sersic modelarcsecphys.angSizefloatflag[0/2]? Flag on double component early-type galaxies (ETGs) (1)meta.code.errorintnullableedeV[0.01/0.6]? Ellipticity for deV component of deVExp model (2)src.ellipticityfloatnullablepadeV? Position angle for deV component of deVExp model (2)degpos.posAngfloatnullableRedeV[0.5/17.1]? Effective radius for deV component of deVExp model (2)arcsecphys.angSizefloatnullablefdeV[12.7/17]? Flux for deV component of deVExp model (2)magstat.paramfloatnullableeExp[0.01/0.8]? Ellipticity for Exp component of deVExp model (2)src.ellipticityfloatnullablepaExp? Position angle for Exp component of deVExp model (2)degpos.posAngfloatnullableReExp[4/116]? Effective radius for Exp component of deVExp model (2)arcsecphys.angSizefloatnullablefExp[13.3/17]? Flux for Exp component of deVExp model (2)magstat.paramfloatnullableDR12Display data from the SDSS-DR12 photometric catalog (V/147) within 1"meta.ref.urlcharSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar_RAPositions from SDSS names (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS names (declination part)degpos.eq.dec;meta.main