J/A+A/700/A56ivo://CDS.VizieR/J/A+A/700/A56doi:10.26093/cds/vizier/bc-nw/lfgCDSBernaud E.Boissier S.JunaisMalek K.Hugot E.Galaz G.2026-08-03T06:56:46Z2025-08-05T09:09:58ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryvisible-astronomyultraviolet-astronomyExtended-UV (XUV) galaxies are galaxies presenting an extended outer ultraviolet disks. Although some Giant Low Surface Brightness (GLSB) galaxies are also XUV, their relation has been seldom studied. This work aims to determine whether a sample of nine XUV galaxies can be classified as GLSBs, by analyzing their photometric properties in deep optical images. The method presented here uses optical data from the Dark Energy Survey (DES) to construct surface brightness (SB) profiles for each galaxy. A characteristic UV radius is defined to examine the XUV disks. The surface brightness profiles are fitted using simple exponential functions, and the extracted parameters are compared with the literature to identify possible GLSB galaxies. We examined also other diagnostics, including color profiles. The analysis of the optical surface brightness profiles of XUV galaxies reveal that they can be classified into three different families. One third meet the GLSB criteria in terms of diffuseness, another third are regular, and the remaining have a stronger decline in the outer disk than in the inner disk, opposite to GLSBs. The color profiles allowed us, in addition to distinguish one of the galaxy, NGC1140, likely resulting from a rare dwarf-dwarf merger.2025A&A...700A..56Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/700/A56CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/700/A56https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/700/A56http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/700/A56https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/700/A56https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/700/A56http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/700/A56GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/700/A56/table1 (Properties of the sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/700/A56/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/700/A56/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/700/A56/table1?GETtext/xml+votable180.050000true13.72283306-37.684388890.0055555555555555566/20526 33920 34404 35536 36756 36785 36790 36793 47456https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/700/A56?format=asciiUVOpticaldefaultJ/A+A/700/A56/table1Properties of the samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainR25Semimajor axis of the isophote 25mag/arcsec^2^arcsecphys.angSize.smajAxisintSimbadSimbad column added by the CDSmeta.ref.urlcharDistDistanceMpcpos.distancefloatE(B-V)Reddeningmagphot.color.excessfloatType1[Y/N] XUV type 1 ?meta.codecharType2[Y/N] XUV type 2 ?meta.codecharlogMHIHI masslog(solMass)phys.massfloatMTypeMorphological typesrc.morph.typecharScaleScalekpc/arcsecinstr.scalefloatJ/A+A/700/A56/tablea1Surface brightness profiles for the all sample in grizY bands of DES and FUV and NUV from GALEXE_SuBrYUpper error on surface brigthness in Y bandmag.arcsec**-2stat.error;stat.maxfloate_SuBrYLower error on surface brigthness in Y bandmag.arcsec**-2stat.errorfloatSuBrFUVSurface brigthness in FUV bandmag.arcsec**-2phot.mag.sbfloatE_SuBrFUVUpper error on surface brigthness in FUV bandmag.arcsec**-2stat.error;stat.maxfloate_SuBrFUVLower error on surface brigthness in FUV bandmag.arcsec**-2stat.errorfloatSuBrNUVSurface brigthness in NUV bandmag.arcsec**-2phot.mag.sbfloatE_SuBrNUVUpper error on surface brigthness in NUV bandmag.arcsec**-2stat.error;stat.maxfloate_SuBrNUVLower error on surface brigthness in NUV bandmag.arcsec**-2stat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharamajSemi-major axis of ellipse (sma)arcsecphys.angSize;srcfloatSuBrgSurface brigthness in g bandmag.arcsec**-2phot.mag.sbfloatE_SuBrgUpper error on surface brigthness in g bandmag.arcsec**-2stat.error;stat.maxfloate_SuBrgLower error on surface brigthness in g bandmag.arcsec**-2stat.errorfloatSuBrrSurface brigthness in r bandmag.arcsec**-2phot.mag.sbfloatE_SuBrrUpper error on surface brigthness in r bandmag.arcsec**-2stat.error;stat.maxfloate_SuBrrLower error on surface brigthness in r bandmag.arcsec**-2stat.errorfloatSuBriSurface brigthness in i bandmag.arcsec**-2phot.mag.sbfloatE_SuBriUpper error on surface brigthness in i bandmag.arcsec**-2stat.error;stat.maxfloate_SuBriLower error on surface brigthness in i bandmag.arcsec**-2stat.errorfloatSuBrzSurface brigthness in z bandmag.arcsec**-2phot.mag.sbfloatE_SuBrzUpper error on surface brigthness in z bandmag.arcsec**-2stat.error;stat.maxfloate_SuBrzLower error on surface brigthness in z bandmag.arcsec**-2stat.errorfloatSuBrYSurface brigthness in Y bandmag.arcsec**-2phot.mag.sb;em.opt.Bfloat