J/ApJ/931/51ivo://CDS.VizieR/J/ApJ/931/51doi:10.26093/cds/vizier.19310051CDSSetton D.J.Verrico M.Bezanson R.Greene J.E.Suess K.A.,Goulding A.D.Spilker J.S.Kriek M.Feldmann R.Narayanan D.,Hall-Hooper K.Kado-Fong E.2026-02-10T20:05:27Z2024-05-07T12:39:57ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomyredshiftedgalaxy-classification-systemsgalaxy-radiisurveysWe present structural measurements of 145 spectroscopically selected intermediate-redshift (z~0.7), massive (M_*_~10^11^M_{sun}_) post-starburst galaxies from the SQuIGG->LE sample measured using wide-depth Hyper Suprime-Cam i-band imaging. This deep imaging allows us to probe the sizes and structures of these galaxies, which we compare to a control sample of star-forming and quiescent galaxies drawn from the LEGA-C Survey. We find that post-starburst galaxies systematically lie ~0.1dex below the quiescent mass-size (half-light radius) relation, with a scatter of ~0.2dex. This finding is bolstered by nonparametric measures, such as the Gini coefficient and the concentration, which also reveal these galaxies to have more compact light profiles than both quiescent and star-forming populations at similar mass and redshift. The sizes of post-starburst galaxies show either negative or no correlation with the time since quenching, such that more recently quenched galaxies are larger or similarly sized. This empirical finding disfavors the formation of post-starburst galaxies via a purely central burst of star formation that simultaneously shrinks the galaxy and shuts off star formation. We show that the central densities of post-starburst and quiescent galaxies at this epoch are very similar, in contrast with their effective radii. The structural properties of z~0.7 post-starburst galaxies match those of quiescent galaxies that formed in the early universe, suggesting that rapid quenching in the present epoch is driven by a similar mechanism to the one at high redshift.2022ApJ...931...51Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/931/51CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)J/ApJ/588/218 : i*g* photometry of SDSS EDR galaxies (Abraham+, 2003)J/ApJS/147/1 : Classification of nearby galaxies (Conselice+, 2003)J/ApJ/749/121 : Surface brightness profiles if z=2 galaxies (Szomoru+, 2012)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/833/19 : 0.02<z<1.4 post-starburst SDSS gal. (Pattarakijwanich+, 2016)J/ApJ/862/2 : Post-starburst galaxy ages from SDSS (French+, 2018)J/ApJ/877/103 : Half-mass radii for ~7000 gal. at 1.0<=z<=2.5 (Suess+, 2019)J/ApJ/919/134 : SDSS shocked post-starburst gal. with HST (Sazonova+, 2021)J/ApJS/256/44 : LEGA-C DR3: spectroscopy of 0.6<z<1 gal. (van der Wel+, 2021)J/ApJ/923/222 : GCLASS HST grism data of z~1 clusters (Matharu+, 2021)J/ApJ/926/89 : SQuIGGLE; SDSS 0.5<z<=0.9 post-starburst gal. (Suess+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/931/51https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/931/51http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/931/51https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/931/51https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/931/51http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/931/51GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/931/51/galaxies (Structural and selected spectrophotometric properties of SQuIGGLE post-starburst galaxies (Table 1) and uncertainties on Sersic parameters from PSF model refitting (Table 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/931/51/galaxies?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/931/51/galaxies?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/931/51/galaxies?GETtext/xml+votable180.050000true144.41339-1.15750110.0055555555555555566/4101 4103 4106 4109 4114 4116 4121 4124 4130 4136 8225 9644 9646 9822-9823 10603 10613 10616 10689 11264 17405 17671 17673 17680 17686 17697 17706 17713 17730 17734 17738 17762-17763 17767 17769 17772 17777-17779 17796 17804 17811-17813 17817 17836 17838 17842 17850 18032 18034 18067 18084-18085 18100 18176-18177 18185 18766 18777 18793 18829 18836 18844 18846 18858 18860 18870 18875 18880 18884 19020 19025 19032 19044 19056 19065 19068 19242 19337 25926 25940 25945 25951 25954 25972 25980 26017 26042-26043 26060 26069 26072 26169 26174 26250 26276 26292 26303 26307 26314 26316 26373 26380 26496 26871 26957 26968 26970 26975 27028 27048 27066 27074 27217 27225 27234 27236 27281 27283 27285 27298 27310 27320 27361 27395 27397 27406 27414 27427 27650 27664 27668 27688 27776 31402https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/931/51?format=asciiOpticaldefaultJ/ApJ/931/51/galaxiesStructural and selected spectrophotometric properties of SQuIGGLE post-starburst galaxies (Table 1) and uncertainties on Sersic parameters from PSF model refitting (Table 2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS-DR14 names as retrieved in Suess+ 2022, J/ApJ/926/89meta.id;meta.maincharRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-7/45] Declination (J2000)degpos.eq.dec;meta.mainzspec[0.54/0.9] Spectroscopic redshiftsrc.redshiftfloatlogM16[10.68/11.54] Log, stellar mass, 16th percentile (1)log(solMass)phys.massfloatlogM50[10.7/11.6] Log, stellar mass, 50th percentile (1)log(solMass)phys.massfloatlogM84[10.7/11.62] Log, stellar mass, 84th percentile (1)log(solMass)phys.massfloatre[0.78/12.3] Effective Sersic radius (2)kpcphys.size.radiusfloatreCorr[0.76/10.8] Residual-corrected effective radii (3)kpcphys.size.radiusfloatn[0.79/6] Sersic parameter (2)stat.fit.paramfloatmag[18.3/21.1] Sersic magnitude (2)magphot.magfloatb/a[0.35/0.99] Sersic axis ratio (2)phys.size.axisRatiofloatlogSig1[9.38/10.8] Log of surface density at 1kpclog(solMass.kpc**-2)phys.density;phys.mass;arith.ratiofloatGini[0.4/0.8] Gini coefficient (4)stat.fit.paramfloatConc[2/3.4] Generalized concentration (4)stat.paramfloattq16[0.01/0.6]? Time since quenching, 16th percentile (5)Gyrtimefloatnullabletq50[0.02/0.8]? Time since quenching, 50th percentile (5)Gyrtimefloatnullabletq84[0.03/1.3]? Time since quenching, 84th percentile (5)GyrtimefloatnullablefBurst16[0.02/0.8]? Burst fraction, 16th percentile (5)stat.param;arith.ratiofloatnullablefBurst50[0.02/1]? Burst fraction, 50th percentile (5)stat.param;arith.ratiofloatnullablefBurst84[0.03/1]? Burst fraction, 84th percentile (5)stat.param;arith.ratiofloatnullablere16[0.76/12.6] Effective Sersic radius, kpc, 16th percentilekpcphys.size.radiusfloatre50[0.97/13] Effective Sersic radius, kpc, 50th percentilekpcphys.size.radiusfloatre84[1/13.3] Effective Sersic radius, kpc, 84th percentilekpcphys.size.radiusfloatn16[0.8/6] Sersic parameter, 16th percentilestat.fit.paramfloatn50[0.88/6] Sersic parameter, 50th percentilestat.fit.paramfloatn84[1.2/6] Sersic parameter, 84th percentilestat.fit.paramfloatmag16[18.29/21.1] Sersic magnitude, 16th percentilemagphot.magfloatmag50[18.3/21.2] Sersic magnitude, 50th percentilemagphot.magfloatmag84[18.35/21.2] Sersic magnitude, 84th percentilemagphot.magfloatb/a16[0.19/0.96] Sersic axis ratio, b/a, 16th percentilephys.size.axisRatiofloatb/a50[0.3/0.98] Sersic axis ratio, b/a, 50th percentilephys.size.axisRatiofloatb/a84[0.39/0.99] Sersic axis ratio, b/a, 84th percentilephys.size.axisRatiofloatlogSig1-16[9/10.3] Log, surface density at 1kpc, Msun/kpc2, 16th percentilelog(solMass.kpc**-2)phys.density;phys.mass;arith.ratiofloatSimbadNameSimbad column added by the CDSmeta.idcharnullableNEDNED column added by the CDSmeta.ref.urlcharlogSig1-50[9/10.3] Log, surface density at 1kpc, Msun/kpc2, 50th percentilelog(solMass.kpc**-2)phys.density;phys.mass;arith.ratiofloatlogSig1-84[9.2/10.5] Log, surface density at 1kpc, Msun/kpc2, 84th percentilelog(solMass.kpc**-2)phys.density;phys.mass;arith.ratiofloatSloanDisplay the online SDSS-DR17 data for the nearest objectmeta.ref.urlchar