J/ApJ/877/103ivo://CDS.VizieR/J/ApJ/877/103doi:10.26093/cds/vizier.18770103CDSSuess K.A.Kriek M.Price S.H.Barro G.2021-03-29T12:23:36Z2020-12-17T12:36:54ZCDS support team

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

cds-question@unistra.frgalaxiesphotometrygalaxy-classification-systemsredshiftedRadial mass-to-light ratio gradients cause the half-mass and half-light radii of galaxies to differ, potentially biasing studies that use half-light radii. Here we present the largest catalog to date of galaxy half-mass radii at z>1: 7006 galaxies in the CANDELS fields at 1.0<=z<=2.5. The sample includes both star-forming and quiescent galaxies with stellar masses 9.0<=log(M_*_/M_{sun}_)<=11.5. We test three methods for calculating half-mass radii from multiband PSF-matched Hubble Space Telescope (HST) imaging: two based on spatially resolved spectral energy distribution modeling, and one that uses a rest-frame color profile. All three methods agree, with scatter <~0.3dex. In agreement with previous studies, most galaxies in our sample have negative color gradients (the centers are redder than the outskirts, and r_e,mass_<r_e,light_). We find that color gradient strength has significant trends with increasing stellar mass, half-light radius, U-V color, and stellar mass surface density. These trends have not been seen before at z>1. Furthermore, color gradients of star-forming and quiescent galaxies show a similar redshift evolution: they are flat at z>~2, then steeply decrease as redshift decreases. This affects the galaxy mass-size relation. The normalizations of the star-forming and quiescent r_mass_-M_*_ relations are 10%-40% smaller than the corresponding r_light_-M_*_ relations; the slopes are ~0.1-0.3dex shallower. Finally, the half-mass radii of star-forming and quiescent galaxies at M_*_=10^10.5^M_{sun}_ only grow by ~1% and ~8% between z~2.25 and z~1.25. This is significantly less than the ~37% and ~47% size increases found when using the half-light radius.2019ApJ...877..103Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/877/103CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/655/51 : HDFS IRAC observations of 2<z<3.5 galaxies (Wuyts+, 2007)J/ApJ/739/L44 : Structural data for gal. between 0.2<z<2.7 (Damjanov+, 2011)J/ApJ/749/121 : Surface brightness profiles if z=2 galaxies (Szomoru+, 2012)J/ApJS/203/24 : Structural parameters of gal. in CANDELS (van der Wel+, 2012)J/ApJS/206/10 : CANDELS multiwavelength catalog (Galametz+, 2013)J/ApJ/763/73 : Surface density profiles of GOODS-South gal. (Szomoru+, 2013)J/ApJ/771/85 : Dynamical masses of z~2 quiescent gal. (van de Sande+, 2013)J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)J/ApJS/225/27 : 3D-HST Survey: grism spectra master catalog (Momcheva+, 2016)J/ApJ/830/51 : FourStar galaxy evolution survey (ZFOURGE) (Straatman+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/877/103https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/877/103http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/877/103https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/877/103https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/877/103http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/877/103GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/877/103/table1 (Half-mass radii for 7006 galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/877/103/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/877/103/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/877/103/table1?GETtext/xml+votable180.050000true34.33022306-5.213066110.0055555555555555566/17679 17690 27258 35935https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/877/103?format=asciiOpticaldefaultJ/ApJ/877/103/table1Half-mass radii for 7006 galaxiesisQuiGalaxy classified as quiescent (7)src.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[161/50461] 3D-HST catalog (v4.0) identifier (<[SWM2014] {Field} NNNNN> in Simbad)meta.id;meta.mainintFieldField identifier (COSMOS, GOODS-S or UDS)meta.id;obs.fieldcharRAJ2000[34.22/150.21] Right Ascension (J2000) (1)degpos.eq.ra;meta.mainDEJ2000[-27.9/2.4] Declination (J2000) (1)degpos.eq.dec;meta.mainz[1/2.5] Photometric redshift (2)src.redshift.photfloatlogM*[9/11.8] log stellar mass (3)log(solMass)phys.massfloatre[0.14/208.4]? Effective half light radius (4)kpcphysfloatnullablee_re[0/71.2]? Uncertainty in rekpcstat.errorfloatnullablen[0.2/8] Sersic index (5)stat.fit.paramfloate_n[0/4.7] Uncertainty in n (5)stat.errorfloatrem1[0.15/79.3]? Method 1 effective half mass radius (6)kpcmeta.notefloatnullablee_rem1[0.14/66.4]? Lower 16% percentile uncertainty in rem1kpcstat.errorfloatnullableE_rem1[0.18/99.5]? Upper 84% percentile uncertainty in rem1kpcstat.error;stat.maxfloatnullablerem2[0.25/203.2]? Method 2 effective half mass radius (6)kpcmeta.notefloatnullablee_rem2[0.25/203]? Lower 16% percentile uncertainty in rem2kpcstat.errorfloatnullableE_rem2[0.28/203.4]? Upper 84% percentile uncertainty in rem2kpcstat.error;stat.maxfloatnullablerem3[0.14/58.3]? Method 3 effective half mass radius (6)kpcmeta.notefloatnullablee_rem3[0.14/50.9]? Lower 16% percentile uncertainty in rem3kpcstat.errorfloatnullableE_rem3[0.15/100]? Upper 84% percentile uncertainty in rem3kpcstat.error;stat.maxfloatnullableZFOURGEDisplay data from ZFOURGE (Straatman+, 2016, J/ApJ/830/51) within 0.5"meta.ref.urlintnullablevdW12Display data from van der Wel+, 2012, J/ApJS/203/24 within 0.5"meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar