J/ApJ/961/118ivo://CDS.VizieR/J/ApJ/961/118CDSKaushal Y.Nersesian A.Bezanson R.van der Wel A.Leja J.,Carnall A.Gallazzi A.Zibetti S.Khullar G.Franx M.Muzzin A.,de Graaff A.Pacifici C.Whitaker K.E.Bell E.F.Martorano M.2026-05-27T08:10:04Z2026-05-27T08:53:39ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopygalaxy-kinematicsredshiftedsurveysphotometryvisible-astronomyastronomical-modelsstellar-massesstellar-agesWe present individual star formation histories (SFHs) of ~3000 massive galaxies (log(M*/M_{sun}_)>10.5) from the Large Early Galaxy Astrophysics Census spectroscopic survey at a lookback time of ~7 billion yr and quantify the population trends leveraging 20hr deep-integrated spectra of these ~1800 star-forming and ~1200 quiescent galaxies at 0.6<z<1.0. Essentially all galaxies at this epoch contain stars of age <3Gyr, in contrast with older massive galaxies today, facilitating better recovery of previous generations of star formation at cosmic noon and earlier. We conduct spectrophotometric analysis using parametric and nonparametric Bayesian stellar population synthesis modeling tools-Bagpipes and Prospector-to constrain the median SFHs of this mass complete sample and characterize population trends. A consistent picture arises for the late-time stellar mass growth when quantified as t50 and t90, corresponding to the age of the Universe when galaxies formed 50% and 90% of their total stellar mass, although the two methods disagree at the earliest formation times (e.g., t10). Our results reveal trends in both stellar mass and stellar velocity dispersion as in the local Universe-low-mass galaxies with shallower potential wells grow their stellar masses later in cosmic history compared to high-mass galaxies. Unlike local quiescent galaxies, the median duration of late-time star formation ({tau}_SF,late_=t90-t50) does not consistently depend on the stellar mass. This census sets a benchmark for future deep spectrophotometric studies of the more distant Universe.2024ApJ...961..118Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/961/118CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/621/673 : Line indices for 124 early-type galaxies (Thomas+, 2005)J/ApJS/185/1 : A catalog of star formation and metallicity (Tojeiro+, 2009)J/ApJS/206/8 : COSMOS/UltraVISTA Ks-selected catalogs v4.1 (Muzzin+, 2013)J/ApJ/777/18 : Stellar mass functions of galaxies to z=4 (Muzzin+, 2013)J/ApJ/795/165 : Line ratios in z~2-3 gal. from KBSS-MOSFIRE (Steidel+, 2014)J/MNRAS/448/3484 : ATLAS3D Project. XXX (McDermid+, 2015)J/MNRAS/446/2144 : Galaxy And Mass Assembly: red & blue gal. (Taylor+, 2015)J/ApJS/239/27 : LEGA-C DR2: galaxies in the COSMOS field (Straatman+, 2018)J/MNRAS/490/417 : VANDELS massive quiescent gal. at 1.0<z<1.3 (Carnall+, 2019)J/ApJ/898/171 : CLEAR. II. SFRs of quiescent gal. (Estrada-Carpenter+, 2020)J/ApJS/256/44 : LEGA-C DR3: spectra of 0.6<z<1 gal. (van der Wel+, 2021)J/ApJ/923/11 : Stellar kinematics of LEGA-C galaxies (van Houdt+, 2021)J/ApJ/926/89 : SQuIGGLE survey: SDSS post-starburst gal. (Suess+, 2022)J/ApJ/936/9 : LEGA-C parameters for 877 galaxies (Van der Wel+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/961/118https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/961/118http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/961/118https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/961/118https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/961/118http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/961/118GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/961/118/table2 (*Bagpipes - Spectro-photometric modeling results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/961/118/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/961/118/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/961/118/table2?GETtext/xml+votable180.050000true150.4296252.42722220.005555555555555556Cone search capability for table J/ApJ/961/118/table4 (*Prospector - Spectro-photometric modeling results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/961/118/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/961/118/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/961/118/table4?GETtext/xml+votable180.050000true150.41516671.75819440.0055555555555555565/6814 6/27245 27247 27344https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/961/118?format=asciiOpticaldefaultJ/ApJ/961/118/table2*Bagpipes - Spectro-photometric modeling resultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[MMS2013][3945/261890] LEGA-C catalog object identifier (UltraVISTA ID)meta.id;meta.mainintprimaryMask[1/102] LEGA-C catalog object maskmeta.id;obsintLEGAC[1/4077] LEGA-C catalog object survey identifier (ID of a unique spectrum)meta.idintzsp[0.1/1.76] LEGA-C catalog spectroscopic redshiftsrc.redshiftfloatsigma[0.2/1000]? LEGA-C catalog stellar velocity dispersion (sigma_stars)km/sphys.veloc.dispersionfloatnullablelogMsCat[8.3/12.02]? Stellar mass estimate (1)log(solMass)phys.massfloatnullablelogMsfit[3.39/12.4] Fit derived median stellar log masslog(solMass)phys.mass;stat.medianfloate_logMsfit[0.003/4.5] The 50th - 16th percentile of logMsfitlog(solMass)stat.error;stat.min;phys.massfloatE_logMsfit[0.003/2.66] The 84th - 50th percentile of logMsfitlog(solMass)stat.error;stat.max;phys.massfloatSimbadSimbad column added by the CDSmeta.ref.urlcharSFR[0/425.3] Fit derived median instantaneous star formation ratesolMass/yrphys.SFR;stat.medianfloate_SFR[0/79.5] 50th - 16th percentile of SFRsolMass/yrstat.error;stat.min;phys.SFRfloatE_SFR[0/80.4] 84th - 50th percentile of SFRsolMass/yrstat.error;stat.max;phys.SFRfloatt10[0.003/7.11] Median 10% formation time (2)Gyrtime.agefloate_t10[0/3.9] The 50th - 16th percentile of t10Gyrstat.error;stat.min;time.agefloatE_t10[0/4.6] The 84th - 50th percentile of t10Gyrstat.error;stat.max;time.agefloatt50[0.003/7.6] Median 50% formation time (2)Gyrtime.agefloate_t50[0/1.31] The 50th - 16th percentile of t50Gyrstat.error;stat.min;time.agefloatE_t50[0/2] The 84th - 50th percentile of t50%Gyrstat.error;stat.max;time.agefloatt90[0.003/7.91] Median 90% formation time (2)Gyrtime.agefloate_t90[0/1.5] The 50th - 16th percentile of t90%Gyrstat.error;stat.min;time.agefloatE_t90[0/2.3] The 84th - 50th percentile of t90%Gyrstat.error;stat.max;time.agefloatM13Display data from Muzzin+ 2013, J/ApJS/206/8meta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/961/118/table4*Prospector - Spectro-photometric modeling results[MMS2013][3945/261890] LEGA-C catalog object identifier (UltraVISTA ID)meta.id;meta.mainintprimarylogMsCat[8.3/12.1]? Stellar mass estimate (1)log(solMass)phys.massfloatnullablelogMsfit[8.6/12]? Fit derived median stellar log masslog(solMass)phys.mass;stat.medianfloatnullablee_logMsfit[0/3.7]? The 50th - 16th percentile of logM*fitlog(solMass)stat.error;stat.min;phys.massfloatnullableE_logMsfit[0/2]? The 84th - 50th percentile of logM*fitlog(solMass)stat.error;stat.max;phys.massfloatnullableSFR[0.003/3150]? Fit derived median instantaneous star formation ratesolMass/yrphys.SFR;stat.mediandoublenullablee_SFR[0.003/3132]? The 50th - 16th percentile of SFRsolMass/yrstat.error;stat.min;phys.SFRdoublenullableSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMask[1/102] LEGA-C catalog object maskmeta.id;obsintLEGAC[1/4077] LEGA-C catalog object survey identifier (ID of a unique spectrum)meta.idintzsp[0.1/1.76] LEGA-C catalog spectroscopic redshiftsrc.redshiftfloatsigma[0.2/1000] LEGA-C catalog stellar velocity dispersionkm/sphys.veloc.dispersionfloatE_SFR[0.069/8598]? The 84th - 50th percentile of SFRsolMass/yrstat.error;stat.max;phys.SFRdoublenullablet10[0.05/6.9]? Median 10% formation time (2)Gyrtime.agefloatnullablee_t10[0/2.6]? The 50th - 16th percentile of t10Gyrstat.error;stat.min;time.agefloatnullableE_t10[0/2.4]? The 84th - 50th percentile of t10Gyrstat.error;stat.max;time.agefloatnullablet50[0.2/7.4]? Median 50% formation time (2)Gyrtime.agefloatnullablee_t50[0/3.7]? The 50th - 16th percentile of t50Gyrstat.error;stat.min;time.agefloatnullableE_t50[0/3.1]? The 84th - 50th percentile of t50%Gyrstat.error;stat.max;time.agefloatnullablet90[0.4/7.9]? Median 90% formation time (2)Gyrtime.agefloatnullablee_t90[0/3.8]? The 50th - 16th percentile of t90%Gyrstat.error;stat.min;time.agefloatnullableE_t90[0/1.5]? The 84th - 50th percentile of t90%Gyrstat.error;stat.max;time.agefloatnullableM13Display data from Muzzin+ 2013, J/ApJS/206/8meta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main