J/A+A/705/A84ivo://CDS.VizieR/J/A+A/705/A84CDSLiao L.-W.Cooper A.2026-03-02T06:25:50Z2026-01-09T10:12:11ZCDS support team

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

cds-question@unistra.frmilky-way-galaxystellar-massesstellar-radiiThe galaxy size-luminosity and size-stellar mass relations are important constraints on the galactic baryon cycle of gas accretion, star formation, and feedback. There are conflicting claims in the literature regarding how environment influences size: both `direct' transformative effects and `assembly bias' may contribute to observed variations with environment. We construct a large homogeneous sample of size measurements to M_r_~-14 (M*~10^7^M_{sun}_). Our sample fills a gap in field galaxy size measurements around ~10^7^-10^8^M_{sun}_; the literature at these masses is biased towards satellites of L* galaxies and members of galaxy clusters. We use sizes from the DESI Legacy Survey (DESI-LS; significantly larger and deeper than SDSS), together with a published catalog that contains stellar masses and cluster positions derived from DESI-LS photometry. Our sample extends to z<0.3 and comprises 540228 galaxies with spectroscopic redshifts and 9513732 galaxies with photometric redshifts. We explore the environmental dependence of size for a mass-limited subset of our sample at z<0.05, based on distance to the nearest cluster center. We obtain size-luminosity and size-mass relations in good agreement with previous studies. By separating galaxies according to color and morphology, we show that the environmental variation of the overall size-mass relation on megaparsec scales can be understood as the consequence of a changing mixture of subpopulations, rather than `direct' size transformation. For example, at fixed mass, quiescent (red) late-type galaxies within 2Mpc of a cluster have the same size as quiescent late-type galaxies 30Mpc from the nearest cluster. Our results support individual galaxy assembly histories as the primary determinant of galaxy size. The existence of significantly different, environment-insensitive size mass relations for subpopulations separated by color (star formation rate) and Sersic index (morphology) provides a clear target for calibration of the baryon cycle in cosmological simulations.2026A&A...705A..84Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/705/A84CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/705/A84https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/705/A84http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/705/A84https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/705/A84https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/705/A84http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/705/A84GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/705/A84/fig4aSpectroscopic-redshift sample, circular R50 sizes, in a given magnituderecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSample[SZ PZ] Sample name (G1)meta.id;src.samplecharParamParameter name (G2)meta.id;stat.paramcharMbinStellar-magnitude bin (log10(rMAG))log(mag)phot.mag;meta.modelledfloatlogmuall? Param median size for all galaxieslog(kpc)phys.angSizedoublenullablee_logmuall? Param 1-sigma error for all galaxieslog(kpc)stat.errordoublenullablelogmured? Param median size for red subsamplelog(kpc)phys.angSizedoublenullablee_logmured? Param 1-sigma error for red subsamplelog(kpc)stat.errordoublenullablelogmublue? Param median size for blue subsamplelog(kpc)phys.angSizedoublenullablee_logmublue? Param 1-sigma error for blue subsamplelog(kpc)stat.errordoublenullablelogmuell? Param median size for elliptical subsamplelog(kpc)phys.angSizedoublenullablee_logmuell? Param 1-sigma error for elliptical subsamplelog(kpc)stat.errordoublenullablelogmuspi? Param median size for spiral subsamplelog(kpc)phys.angSizedoublenullablee_logmuspi? Param 1-sigma error for spiral subsamplelog(kpc)stat.errordoublenullableJ/A+A/705/A84/fig4bSpectroscopic-redshift sample, major-axis sizes, in a given magnitudeParamParameter name (G2)meta.id;stat.paramcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSample[SZ PZ] Sample name (G1)meta.id;src.samplecharMbinStellar-magnitude bin (log10(rMAG))log(mag)phot.mag;meta.modelledfloatlogmuall? Param median size for all galaxieslog(kpc)phys.angSizedoublenullablee_logmuall? Param 1-sigma error for all galaxieslog(kpc)stat.errordoublenullablelogmured? Param median size for red subsamplelog(kpc)phys.angSizedoublenullablee_logmured? Param 1-sigma error for red subsamplelog(kpc)stat.errordoublenullablelogmublue? Param median size for blue subsamplelog(kpc)phys.angSizedoublenullablee_logmublue? Param 1-sigma error for blue subsamplelog(kpc)stat.errordoublenullablelogmuell? Param median size for elliptical subsamplelog(kpc)phys.angSizedoublenullablee_logmuell? Param 1-sigma error for elliptical subsamplelog(kpc)stat.errordoublenullablelogmuspi? Param median size for spiral subsamplelog(kpc)phys.angSizedoublenullablee_logmuspi? Param 1-sigma error for spiral subsamplelog(kpc)stat.errordoublenullableJ/A+A/705/A84/fig4cPhotometric-redshift sample, circular R50 sizes, in a given magnitudelogmuell? Param median size for elliptical subsamplelog(kpc)phys.angSizedoublenullablee_logmuell? Param 1-sigma error for elliptical subsamplelog(kpc)stat.errordoublenullablelogmuspi? Param median size for spiral subsamplelog(kpc)phys.angSizedoublenullablee_logmuspi? Param 1-sigma error for spiral subsamplelog(kpc)stat.errordoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSample[SZ PZ] Sample name (G1)meta.id;src.samplecharParamParameter name (G2)meta.id;stat.paramcharMbinStellar-magnitude bin (log10(rMAG))log(mag)phot.mag;meta.modelledfloatlogmuall? Param median size for all galaxieslog(kpc)phys.angSizedoublenullablee_logmuall? Param 1-sigma error for all galaxieslog(kpc)stat.errordoublenullablelogmured? Param median size for red subsamplelog(kpc)phys.angSizedoublenullablee_logmured? Param 1-sigma error for red subsamplelog(kpc)stat.errordoublenullablelogmublue? Param median size for blue subsamplelog(kpc)phys.angSizedoublenullablee_logmublue? Param 1-sigma error for blue subsamplelog(kpc)stat.errordoublenullableJ/A+A/705/A84/fig4dPhotometric-redshift sample, major-axis sizes, in a given magnituderecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSample[SZ PZ] Sample name (G1)meta.id;src.samplecharParamParameter name (G2)meta.id;stat.paramcharMbinStellar-magnitude bin (log10(rMAG))log(mag)phot.mag;meta.modelledfloatlogmuall? Param median size for all galaxieslog(kpc)phys.angSizedoublenullablee_logmuall? Param 1-sigma error for all galaxieslog(kpc)stat.errordoublenullablelogmured? Param median size for red subsamplelog(kpc)phys.angSizedoublenullablee_logmured? Param 1-sigma error for red subsamplelog(kpc)stat.errordoublenullablelogmublue? Param median size for blue subsamplelog(kpc)phys.angSizedoublenullablee_logmublue? Param 1-sigma error for blue subsamplelog(kpc)stat.errordoublenullablelogmuell? Param median size for elliptical subsamplelog(kpc)phys.angSizedoublenullablee_logmuell? Param 1-sigma error for elliptical subsamplelog(kpc)stat.errordoublenullablelogmuspi? Param median size for spiral subsamplelog(kpc)phys.angSizedoublenullablee_logmuspi? Param 1-sigma error for spiral subsamplelog(kpc)stat.errordoublenullableJ/A+A/705/A84/fig5aSpectroscopic-redshift sample, circularized half-light radii, in a given stellar mass binrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSample[SZ PZ] Sample name (G1)meta.id;src.samplecharParamParameter name (G2)meta.id;stat.paramcharsmLog10 stellar mass (bin center)log(solMass)phys.massfloatlogmuall? Param median size for all galaxieslog(kpc)phys.angSizedoublenullablee_logmuall? Param 1-sigma error for all galaxieslog(kpc)stat.errordoublenullablelogmured? Param median size for red subsamplelog(kpc)phys.angSizedoublenullablee_logmured? Param 1-sigma error for red subsamplelog(kpc)stat.errordoublenullablelogmublue? Param median size for blue subsamplelog(kpc)phys.angSizedoublenullablee_logmublue? Param 1-sigma error for blue subsamplelog(kpc)stat.errordoublenullablelogmuell? Param median size for elliptical subsamplelog(kpc)phys.angSizedoublenullablee_logmuell? Param 1-sigma error for elliptical subsamplelog(kpc)stat.errordoublenullablelogmuspi? Param median size for spiral subsamplelog(kpc)phys.angSizedoublenullablee_logmuspi? Param 1-sigma error for spiral subsamplelog(kpc)stat.errordoublenullableJ/A+A/705/A84/fig5bSpectroscopic-redshift sample, major-axis half-light radii, in a given stellar mass binlogmured? Param median size for red subsamplelog(kpc)phys.angSizedoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSample[SZ PZ] Sample name (G1)meta.id;src.samplecharParamParameter name (G2)meta.id;stat.paramcharsmLog10 stellar mass (bin center)log(solMass)phys.massfloatlogmuall? Param median size for all galaxieslog(kpc)phys.angSizedoublenullablee_logmuall? Param 1-sigma error for all galaxieslog(kpc)stat.errordoublenullablee_logmured? Param 1-sigma error for red subsamplelog(kpc)stat.errordoublenullablelogmublue? Param median size for blue subsamplelog(kpc)phys.angSizedoublenullablee_logmublue? Param 1-sigma error for blue subsamplelog(kpc)stat.errordoublenullablelogmuell? Param median size for elliptical subsamplelog(kpc)phys.angSizedoublenullablee_logmuell? Param 1-sigma error for elliptical subsamplelog(kpc)stat.errordoublenullablelogmuspi? Param median size for spiral subsamplelog(kpc)phys.angSizedoublenullablee_logmuspi? Param 1-sigma error for spiral subsamplelog(kpc)stat.errordoublenullableJ/A+A/705/A84/fig5cPhotometric-redshift sample, circularized half-light radii, in a given stellar mass binSample[SZ PZ] Sample name (G1)meta.id;src.samplecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintParamParameter name (G2)meta.id;stat.paramcharsmLog10 stellar mass (bin center)log(solMass)phys.massfloatlogmuall? Param median size for all galaxieslog(kpc)phys.angSizedoublenullablee_logmuall? Param 1-sigma error for all galaxieslog(kpc)stat.errordoublenullablelogmured? Param median size for red subsamplelog(kpc)phys.angSizedoublenullablee_logmured? Param 1-sigma error for red subsamplelog(kpc)stat.errordoublenullablelogmublue? Param median size for blue subsamplelog(kpc)phys.angSizedoublenullablee_logmublue? Param 1-sigma error for blue subsamplelog(kpc)stat.errordoublenullablelogmuell? Param median size for elliptical subsamplelog(kpc)phys.angSizedoublenullablee_logmuell? Param 1-sigma error for elliptical subsamplelog(kpc)stat.errordoublenullablelogmuspi? Param median size for spiral subsamplelog(kpc)phys.angSizedoublenullablee_logmuspi? Param 1-sigma error for spiral subsamplelog(kpc)stat.errordoublenullableJ/A+A/705/A84/fig5dPhotometric-redshift sample, major-axis half-light radii, in a given stellar mass binrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSample[SZ PZ] Sample name (G1)meta.id;src.samplecharParamParameter name (G2)meta.id;stat.paramcharsmLog10 stellar mass (bin center)log(solMass)phys.massfloatlogmuall? Param median size for all galaxieslog(kpc)phys.angSizedoublenullablee_logmuall? Param 1-sigma error for all galaxieslog(kpc)stat.errordoublenullablelogmured? Param median size for red subsamplelog(kpc)phys.angSizedoublenullablee_logmured? Param 1-sigma error for red subsamplelog(kpc)stat.errordoublenullablelogmublue? Param median size for blue subsamplelog(kpc)phys.angSizedoublenullablee_logmublue? Param 1-sigma error for blue subsamplelog(kpc)stat.errordoublenullablelogmuell? Param median size for elliptical subsamplelog(kpc)phys.angSizedoublenullablee_logmuell? Param 1-sigma error for elliptical subsamplelog(kpc)stat.errordoublenullablelogmuspi? Param median size for spiral subsamplelog(kpc)phys.angSizedoublenullablee_logmuspi? Param 1-sigma error for spiral subsamplelog(kpc)stat.errordoublenullableJ/A+A/705/A84/fig11Galaxy size-mass relation measured within a fixed 2Mpc aperture at z=0.05recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintsmLog10 stellar mass (bin center)log(solMass)phys.massfloatlogmured? Median size of red galaxieslog(kpc)phys.angSizedoublenullablee_logmured? 1-sigma error for red galaxieslog(kpc)stat.errordoublenullablelogmublue? Median size of blue galaxieslog(kpc)phys.angSizedoublenullablee_logmublue? 1-sigma error for blue galaxieslog(kpc)stat.errordoublenullablelogmuell? Median size of elliptical galaxieslog(kpc)phys.angSizedoublenullablee_logmuell? 1-sigma error for elliptical galaxieslog(kpc)stat.errordoublenullablelogmuspi? Median size of spiral galaxieslog(kpc)phys.angSizedoublenullablee_logmuspi? 1-sigma error for spiral galaxieslog(kpc)stat.errordoublenullablelogmuredell? Median size of red ellipticalslog(kpc)phys.angSizedoublenullablee_logmuredell? 1-sigma error for red ellipticalslog(kpc)stat.errordoublenullablelogmuredspi? Median size of red spiralslog(kpc)phys.angSizedoublenullablee_logmuredspi? 1-sigma error for red spiralslog(kpc)stat.errordoublenullablelogmublueell[-99] Median size of blue ellipticalslog(kpc)phys.angSizeinte_logmublueell[-99] 1-sigma error for blue ellipticalslog(kpc)stat.errorintlogmubluespi? Median size of blue spiralslog(kpc)phys.angSizedoublenullablee_logmubluespi? 1-sigma error for blue spiralslog(kpc)stat.errordoublenullable