J/ApJ/945/155ivo://CDS.VizieR/J/ApJ/945/155doi:10.26093/cds/vizier.19450155CDSMiller T.B.van Dokkum P.Mowla L.2025-05-21T20:15:06Z2025-03-21T15:30:49ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryredshiftedgalaxy-radiitwo-color-diagramsvisible-astronomyRecent studies have indicated that the ratio between half-mass and half-light radii, r_mass_/r_light_, varies significantly as a function of stellar mass and redshift, complicating the interpretation of the ubiquitous r_light_-M_*_ relation. To investigate, in this study we construct the light and color profiles of ~3000 galaxies at 1<z<2 with logM_*_/M_{sun}_>10.25 using imcascade, a Bayesian implementation of the Multi-Gaussian Expansion (MGE) technique. imcascade flexibly represents galaxy profiles using a series of Gaussians, free of any a priori parameterization. We find that both star-forming and quiescent galaxies have, on average, negative color gradients. For star-forming galaxies, we find steeper gradients that evolve with redshift and correlate with dust content. Using the color gradients as a proxy for gradients in the M/L ratio, we measure half-mass radii for our sample of galaxies. There is significant scatter in individual rmass/rlight ratios, which is correlated with variation in the color gradients. We find that the median rmass/rlight ratio evolves from 0.75 at z=2 to 0.5 at z=1, consistent with previous results. We characterize the r_mass_-M_*_ relation, and we find that it has a shallower slope and shows less redshift evolution than the r_light_-M_*_ relation. This applies both to star-forming and quiescent galaxies. We discuss some of the implications of using rmass instead of rlight, including an investigation of the size-inclination bias and a comparison to numerical simulations.2023ApJ...945..155Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/945/155CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)J/ApJS/203/24 : Structural param. of galaxies in CANDELS (van der Wel+, 2012)J/ApJ/777/18 : Stellar mass functions of galaxies to z=4 (Muzzin+, 2013)J/ApJ/762/77 : PM2GC mass-limited sample surface phot. (Poggianti+, 2013)J/ApJ/763/73 : Surface density profiles of GOODS-South gal. (Szomoru+, 2013)J/ApJ/793/101 : CANDELS z~2 galaxy properties (Trump+, 2014)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/835/153 : Galaxy env. in the 3D-HST fields (z=0.5-3) (Fossati+, 2017)J/ApJ/854/29 : High-EW [OIII] & H{alpha} emitters from 3D-HST (Maseda+, 2018)J/ApJ/877/103 : Half-mass radii for ~7000 gal. at 1.0<=z<=2.5 (Suess+, 2019)J/ApJ/905/170 : Mass-based structural param. for 3D-HST gal. (Mosleh+, 2020)J/ApJ/901/74 : ALMA obs. of UDS and GOODS-S massive galaxies (Tadaki+, 2020)J/MNRAS/493/87 : 1005 galaxies with z<0.09 sample (Trujillo+, 2020)J/ApJ/937/L33 : JWST morphological param. at 4.4um & 1.5um (Suess+, 2022)http://archive.stsci.edu/prepds/3d-hst/ : 3D-HST on MASThttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/945/155https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/945/155http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/945/155https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/945/155https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/945/155http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/945/155GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/945/155/table1 (Measurements of half-light radii, half-mass radii and color gradients using imcascade)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/945/155/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/945/155/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/945/155/table1?GETtext/xml+votable180.050000true189.16674462.2020540.0055555555555555566/11252 11425 17679 17690 27258 35935https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/945/155?format=asciiOpticaldefaultJ/ApJ/945/155/table1Measurements of half-light radii, half-mass radii and color gradients using imcascadeSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField ("AEGIS"; "COSMOS"; "GOODS-N"; "GOODS-S" or "UDS")meta.id;obs.fieldcharID[2/50460] 3D-HST Field id (1)meta.id.part;meta.mainintRAJ2000[34.2/215.4] Right Ascension (J2000) (1)degpos.eq.ra;meta.mainDEJ2000[-28/62.4] Declination (J2000) (1)degpos.eq.dec;meta.mainz[1/2] Redshift (1)src.redshiftdoublelogMs[10.26/13.74] log, stellar mass (2)log(solMass)phys.massfloatQuenchedIs quenched? True or False (3)meta.codecharrlight[0.3/118] Half-light radius (4)kpcphys.size.radiusfloate_rlight[0/36] Uncertainty in (4)kpcstat.error;phys.size.radiusfloatrmass[-0.83/165] Half-mass radius (4)kpcphys.size.radiusfloate_rmass[0/55.1] Uncertainty in (4)kpcstat.error;phys.size.radiusfloatg(g-r)[-2.5/2.5]? Color gradient, d(g-r)/dlogr (5)arith.grad;phot.color;em.optfloatnullablee_g(g-r)[0/1.3]? Uncertainty in g(g-r) (5)stat.error;arith.grad;phot.colorfloatnullable