J/ApJ/923/257ivo://CDS.VizieR/J/ApJ/923/257doi:10.26093/cds/vizier.19230257CDSKadowaki J.Zaritsky D.Donnerstein R.L.RS P.Karunakaran A.,Spekkens K.2025-09-08T14:12:24Z2022-03-10T12:41:10ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyredshiftedabsolute-magnitudegalaxy-classification-systemsvisible-astronomyultraviolet-astronomygalaxy-clustersWe present new redshift measurements for 19 candidate ultra-diffuse galaxies (UDGs) from the Systematically Measuring Ultra-Diffuse Galaxies (SMUDGes) survey after conducting a long-slit spectroscopic follow-up campaign on 23 candidates with the Large Binocular Telescope. We combine these results with redshift measurements from other sources for 29 SMUDGes and 20 non-SMUDGes candidate UDGs. Together, this sample yields 44 spectroscopically confirmed UDGs (r_e_>=1.5kpc and {mu}_g_(0)>=24mag/arcsec^2^ within uncertainties) and spans cluster and field environments, with all but one projected on the Coma cluster and environs. We find no statistically significant differences in the structural parameters of cluster and noncluster confirmed UDGs, although there are hints of differences among the axis ratio distributions. Similarly, we find no significant structural differences among those in locally dense or sparse environments. However, we observe a significant difference in color with respect to projected clustercentric radius, confirming trends observed previously in statistical UDG samples. This trend strengthens further when considering whether UDGs reside in either cluster or locally dense environments, suggesting starkly different star formation histories for UDGs residing in high- and low-density environments. Of the 16 large (r_e_>=3.5kpc) UDGs in our sample, only one is a field galaxy that falls near the early-type galaxy red sequence. No other field UDGs found in low-density environments fall near the red sequence. This finding, in combination with our detection of Galaxy Evolution Explorer NUV flux in nearly half of the UDGs in sparse environments, suggests that field UDGs are a population of slowly evolving galaxies.2021ApJ...923..257Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/923/257CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/357/819 : Colours and HI line observations in Virgo (Sabatini+, 2005)J/ApJ/638/725 : Fundamental manifold of spheroids (Zaritsky+, 2006)J/ApJ/681/197 : ACS Virgo Cluster Survey. XV (Peng+, 2008)J/A+A/506/677 : HI in Local Supercluster dwarf galaxies (Huchtmeier+, 2009)J/ApJ/772/82 : A catalog of globular cluster systems (Harris+, 2013)J/ApJS/215/22 : The Extended Virgo Cluster Catalog (EVCC) (Kim+, 2014)J/ApJ/833/167 : PAndAS view of Andromeda satellites. II. (Martin+, 2016)J/ApJS/225/11 : Subaru-UDGs in the Coma cluster (Yagi+, 2016)J/ApJ/842/133 : HI-bearing ultra-diffuse ALFALFA galaxies (Leisman+, 2017)J/MNRAS/468/703 : Abell 168 ultra-diffuse galaxies distribution (Roman+, 2017)J/A+A/608/A142 : Fornax Deep Survey with VST. III. LSB gal. (Venhola+, 2017)J/ApJ/857/104 : Low surface brightness galaxies from HSC-SSP (Greco+, 2018)J/AJ/157/212 : Ultra-diffuse galaxies at UV wavelengths (Singh+, 2019)J/ApJS/240/1 : SMUDGes. I. First results in Coma Cluster (Zaritsky+, 2019)J/ApJ/893/47 : MW satellite census. I. DES & PS1 (Drlica-Wagner+, 2020)J/MNRAS/491/5317 : The SDSS extended PSFs (Infante-Sainz+, 2020)J/ApJ/902/39 : GBT HI obs. of ultradiffuse galaxies (Karunakaran+, 2020)J/ApJ/894/75 : Ultra-diffuse & LSB dwarf gal. in A370 from HFF (Lee+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/923/257https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/923/257http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/923/257https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/923/257https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/923/257http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/923/257GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/923/257/targets (LBT SMUDGes (Table 2), non-LBT SMUDGes (Table 3) and non-LBT non-SMUDGes (Table 4) redshift sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/923/257/targets?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/923/257/targets?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/923/257/targets?GETtext/xml+votable180.050000true41.140833-0.2672220.0055555555555555565/2594 7123 6/4961 5058 5203 5262 10295 10380 10398 10400-10401 10403-10404 10417 10754 10760 17753 27965 28003 28024-28025 28061 28130 28138 28145 28149 28151-28153 28485-28486 28538https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/923/257?format=asciiUVOpticaldefaultJ/ApJ/923/257/targetsLBT SMUDGes (Table 2), non-LBT SMUDGes (Table 3) and non-LBT non-SMUDGes (Table 4) redshift samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsLarge Binocular Telescope (LBT) observations from this work (Table 2) or results from other works (Tables 3 and 4)meta.codecharSet[SMDG ] SMUDGes ("SMDG") or non-SMDG (blank) samplemeta.notecharNameSMUDGes name for SMDG or name based on coordinates (HHMMSSs+DDMMSS; J2000)meta.id;meta.maincharf_NameFlag(s) on Name (1)meta.codecharANameAlternate name (2)meta.idcharmu0g[22.5/25.8] g-band central surface brightness, {mu}_g_(0)mag.arcsec**-2phot.mag.sb;em.opt.Bfloatl_NUVMagLimit flag on NUVMagmeta.code.errorcharNUVMag[-15.5/-6]? Absolute GALEX NUV magnitudemagphys.magAbs;em.UV.200-300nmfloatnullablegMag[-16.9/-9.7] Absolute g-band magnitudemagphys.magAbs;em.opt.BfloatrMag[-17.3/-10.2] Absolute r-band magnitudemagphys.magAbs;em.opt.RfloatzMag[-17.6/-10.6] Absolute z-band magnitudemagphys.magAbs;em.opt.Ifloatre[0.3/9.9] Effective radiuskpcphys.size.radiusfloatb/a[0.37/0.97] Axial ratiophys.angSize;arith.ratiofloatn[0.33/1.8] Sersic indexstat.fit.paramfloatczCMB[553/12269] Recessional velocity in the cosmic microwave background rest framekm/sphys.veloc;pos.cmbinte_czCMB[0.2/192]? czCMB uncertaintykm/sstat.errorfloatnullableEnv[DSU] Environmental classification (3)meta.code.class;src.classcharSimbadNameSimbad column added by the CDSmeta.idcharnullableCl?Cluster?meta.codecharRefReference(s) (not for Table 2) (4)meta.ref;pos.framecharZ19Display data from Zaritsky+, 2019, J/ApJS/240/1 within 3"meta.ref.urlintnullableY16Display data from Yagi+, 2016, J/ApJS/225/11 within 3"meta.ref.urlintnullableK20Display data from Karunakaran+, 2020, J/ApJ/902/39 within 1.8'meta.ref.urlintnullable_RAPositions from names (right ascension part)degpos.eq.ra;meta.main_DEPositions from names (declination part)degpos.eq.dec;meta.main