J/MNRAS/533/3771ivo://CDS.VizieR/J/MNRAS/533/3771doi:10.26093/cds/vizier.75333771CDSLazar I.Kaviraj S.Watkins A.E.Martin G.Bichang'a B.Jackson R.A.2025-02-27T20:16:11Z2025-01-30T08:50:59ZCDS support team

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

cds-question@unistra.frdwarf-galaxiesvisible-astronomysloan-photometryastronomical-modelsWe use a complete sample of 211 nearby (z<0.08), dwarf (10^8^M_{sun}_<M*<10^9.5^M_{sun}_) galaxies in low-density environments, to study their structural properties: effective radii (Re), effective surface brightnesses (<{mu}>_e_), and colour gradients. We explore these properties as a function of stellar mass and the three principal dwarf morphological types identified in a companion paper - early-type galaxies (ETGs), late-type galaxies (LTGs), and featureless systems. The median Re of LTGs and featureless galaxies are factors of ~2 and ~1.2 larger than the ETGs. While the median <{mu}>_e_ of the ETGs and LTGs is similar, the featureless class is ~1mag/arcsec^2^ fainter. Although they have similar median Re, the featureless and ETG classes differ significantly in their median <{mu}>_e_, suggesting that their evolution is different and that the featureless galaxies are not a subset of the ETGs. While massive ETGs typically exhibit negative or flat colour gradients, dwarf ETGs generally show positive colour gradients (bluer centres). The growth of ETGs therefore changes from being 'outside-in' to 'inside-out' as we move from the dwarf to the massive regime. The colour gradients of dwarf and massive LTGs are, however, similar. Around 46 per cent of dwarf ETGs show prominent, visually identifiable blue cores which extend out to ~1.5Re. Finally, compared to their non- interacting counterparts, interacting dwarfs are larger, bluer at all radii and exhibit similar median <{mu}>_e_, indicating that interactions typically enhance star formation across the entire galaxy.2024MNRAS.533.3771Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/533/3771CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/258/11 : The COSMOS2020 catalog (Weaver+, 2022)J/MNRAS/529/499 : Dwarf morphology types and parameters (Lazar+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/533/3771https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/533/3771http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/533/3771https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/533/3771https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/533/3771http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/533/3771GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/533/3771/struct-p (Structural properties of our dwarf sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/533/3771/struct-p?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/533/3771/struct-p?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/533/3771/struct-p?GETtext/xml+votable180.050000true150.84104363.0357795060.0055555555555555565/6814 6/27245 27247 27250 27344https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/533/3771?format=asciiOpticaldefaultJ/MNRAS/533/3771/struct-pStructural properties of our dwarf samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/1055] Sequential numbermeta.idintCOSMOS2020COSMOS 2020 catalog IDmeta.id;meta.mainintRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainBand[grizy] Bandinstr.bandpasscharReff-asecEffective radius in arcsecarcsecphys.angSizedoubleReff-kpcEffective radius in kpckpcphys.size.radiusdoublee_Reff-kpcLower 68 percent confidence level of the effective radius in kpckpcstat.errordoubleE_Reff-kpcUpper 68 percent confidence level of the effective radius in kpckpcstat.error;stat.maxdoubleEffsurfBEffective surface brightnessmag.arcsec**-2phot.mag.sbdouble