J/A+A/705/A30ivo://CDS.VizieR/J/A+A/705/A30CDSPizzardo M.Damjanov I.Sohn J.Geller M.J.2026-03-02T06:25:50Z2025-12-24T13:36:39ZCDS support team

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

cds-question@unistra.frgalaxiesphotometrygalaxy-classification-systemsvisible-astronomyastronomical-modelsWe derive structural parameters for a mass-limited sample (M*>10^10^M_{sun}_) of 27000 quiescent galaxies with 0.2<z<0.6 using grizy photometry from Subaru/Hyper Suprime-Cam and dense spectroscopy from the HectoMAP survey. Based on Sersic profile fits in all five bands, we model the wavelength dependence of the circularized half-light radius (R_e,c_, a proxy for size) and Sersic index (n, a proxy for central concentration) and estimate structural parameters in two rest-frames: UV (3500{AA}, tracing young/metal-poor stellar populations) and red (7000{AA}, tracing stellar mass distribution). Combined with the stellar mass, redshift, and D_n_4000, the estimates of R_e,c_ and n enable exploration of the evolution in the structural properties - stellar mass correlations for quiescent galaxies for different stellar population ages. At intermediate redshift, quiescent galaxies at all stellar masses show a systematic decline in size and rise in central concentration with rest-frame wavelength. These structural variations are stronger for galaxies that recently joined the quiescent population (newcomers, with 1.5<D_n_4000<1.6) than for the descendants of galaxies that are already quiescent at the survey limit, z~0.6 (aging/resident population). The combined evidence supports inside-out quenching as the dominant mechanism halting star formation during this epoch. The normalization of the size - stellar mass relation (the typical size of a M*~10^11^M_{sun}_ quiescent galaxy) increases by ~30% between z~0.6 and z~0.2 in the red rest-frame and remains constant in the rest-frame UV. Size growth is age-independent; newcomers are ~20% larger than the aging population across redshifts and rest-frames. Based on the Sersic index - stellar mass relation in the UV, M*~10^11^M_{sun}_ quiescent galaxies maintain a constant central concentration (n~4 for the aging population and n~2 for newcomers). In the red rest-frame, both subpopulations have de Vaucouleurs profiles after accounting for selection effects. The larger sizes and disk-like UV profiles of newcomers link them to their direct progenitors in the star-forming population. For the aging population, the steady red rest-frame growth and elevated central concentration in both red and UV rest-frames suggest minor mergers with progressively redder satellites at lower redshifts as the primary driver of galaxy evolution in the quiescent phase. Large samples of low surface brightness galaxies available in forthcoming sensitive large-area imaging surveys are ideal testbeds for this prediction.2026A&A...705A..30Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/705/A30CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/945/94 : HectoMAP: the complete redshift survey (DR2) (Sohn+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/705/A30https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/705/A30http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/705/A30https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/705/A30https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/705/A30http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/705/A30GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/705/A30/table2 (Single-Sersic model structural parameters for HectoMAP galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/705/A30/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/705/A30/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/705/A30/table2?GETtext/xml+votable180.050000true249.9982142.979230.0055555555555555565/2455 2459-2460 2471 2475-2476 2480 2496 2647 2651-2652 2663 2667-2668 2672 2752 2816 6/9641-9643 9646 9813-9815 9817-9819 9829-9831 9833-9835 9844 9848 9877-9879 9881-9883 9893-9895 9897-9899 9908 9912 9924 9928 9988 9992 10581-10583 10585-10587 10597-10599 10601-10603 10612 10616 10645-10647 10649-10651 10661-10663 10665-10667 10676 10680 10692 10696 10837-10839 10845 11012 11016 11268 11272https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/705/A30?format=asciiOpticaldefaultJ/A+A/705/A30/table2Single-Sersic model structural parameters for HectoMAP galaxieszRedshift (1)src.redshiftdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID of the HectoMAP galaxies, SDSS DR16 Object ID (1)meta.id;meta.mainRAJ2000Right ascension (J2000) (1)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000) (1)degpos.eq.dec;meta.mainindexede_z[]? Error in redshift (-1 when no error for the redshift)stat.error;src.redshiftdoublenullablelogM? base 10 logarithm of stellar mass (1)log(solMass)phys.massfloatnullablee_logM? Error for logMlog(solMass)stat.errorfloatnullableReg? Half-light radius along the galaxy major axis in g-bandarcsecphys.angSizedoublenullablee_Reg? Error in Regarcsecstat.errordoublenullableb/ag? Axis ratio in g-bandmeta.notedoublenullablee_b/ag? Error in b/agstat.errordoublenullableng? Sersic index in g-bandstat.fit.paramfloatnullablee_ng? Error in ngstat.errordoublenullableRer? Half-light radius along the galaxy major axis in r-bandarcsecphys.angSizedoublenullablee_Rer? Error in Rerarcsecstat.errordoublenullableb/ar? Axis ratio in r-bandmeta.notedoublenullablee_b/ar? Error in b/arstat.errordoublenullablenr? Sersic index in r-bandstat.fit.paramfloatnullablee_nr? Error in nrstat.errordoublenullableRei? Half-light radius along the galaxy major axis in i-bandarcsecphys.angSizedoublenullablee_Rei? Error in Reiarcsecstat.errordoublenullableb/ai? Axis ratio in i-bandmeta.notedoublenullablee_b/ai? Error in b/aistat.errordoublenullableni? Sersic index in i-bandstat.fit.paramfloatnullablee_ni? Error in nistat.errordoublenullableRez? Half-light radius along the galaxy major axis in z-bandarcsecphys.angSizedoublenullablee_Rez? Error in Rezarcsecstat.errordoublenullableb/az? Axis ratio in z-bandpos.cartesian.z;arith.ratiodoublenullablee_b/az? Error in b/azstat.errordoublenullablenz? Sersic index in z-bandstat.fit.paramfloatnullablee_nz? Error in nzstat.errordoublenullableRey? Half-light radius along the galaxy major axis in y-bandarcsecphys.angSize;instr.detdoublenullablee_Rey? Error in Reyarcsecstat.errordoublenullableb/ay? Axis ratio in y-bandpos.cartesian.y;arith.ratiodoublenullablee_b/ay? Error in b/aystat.errordoublenullableny? Sersic index in y-bandstat.fit.paramfloatnullablee_ny? Error in nystat.errordoublenullable