J/A+A/640/A106ivo://CDS.VizieR/J/A+A/640/A106doi:10.26093/cds/vizier.36400106CDSMueller O.Marleau F.R.Duc P.-A.Habas R.Fensch J.Emsellem E.,Poulain M.Lim S.Agnello A.Durrell P.Paudel S.,Sanchez-Janssen R.van der Burg R.F.J.2021-04-08T13:29:57Z2020-08-21T08:23:36ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyThe MATLAS deep imaging survey has uncovered a plethora of dwarf galaxies in the low density environment it has mapped. A fraction of them are unusually extended and have a low-surface brightness. Among these so-called ultra-diffuse galaxies, a few seem to host an excess of globular clusters. With the integral-field unit spectrograph MUSE we have observed one of these galaxies - MATLAS J15052031+0148447 (MATLAS-2019) - located towards the nearby group NGC 5846 and measured its systemic velocity,age, and metallicity, and that of its globular clusters candidates. For the stellar body of MATLAS-2019 we derive a metallicity of -1.33^+0.19^-_0.01_dex and an age of 11.2^+1.8^_-0.8_Gyr. For some of the individual GCs and the stacked GC population, we derive consistent ages and metallicities. From the 11 confirmed globular clusters and using a Markov Chain Monte Carlo approach we derived a dynamical mass-to-light ratio of 4.2^+8.6^-_3.4_M/L. This is at the lower end of the luminosity-mass scaling relation defined by the Local Group dwarf galaxies. Furthermore, we couldn't confirm nor reject the possibility of a rotational component of the GC system. If present, this would further modify the inferred mass. Follow-up observations of the globular cluster population and of the stellar body of the galaxy are needed to assess whether this galaxy is lacking dark matter like it was suggested for the pair of dwarf galaxies in the field of NGC 1052, or if this is a miss-interpretation arising from systematic uncertainties of the method commonly used for these systems and the large uncertainties of the individual globular cluster velocities.2020A&A...640A.106Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/640/A106CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/640/A106https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/640/A106http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/640/A106https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/640/A106https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/640/A106http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/640/A106GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/640/A106/list (Information of spectral datacube)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/640/A106/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/640/A106/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/640/A106/list?GETtext/xml+votable180.050000true226.33431.812690.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/640/A1066/8196https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/640/A106?format=asciidefaultJ/A+A/640/A106/listInformation of spectral datacuberecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainscaleScale of the imagearcsec/pixinstr.scalefloatNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintNzNumber of pixels along Z-axismeta.numberintblambdaLower value of wavelength interval0.1nmem.wlfloatBlambdaUpper value of wavelength interval0.1nmem.wlfloatdlambdaWavelength resolution0.1nmspect.resolutionfloatsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharAssocDataAssociated Data web pagemeta.ref.urlchar