J/ApJ/858/102ivo://CDS.VizieR/J/ApJ/858/102doi:10.26093/cds/vizier.18580102CDSAhn C.P.Seth A.C.Cappellari M.Krajnovic D.Strader J.Voggel K.T.,Walsh J.L.Bahramian A.Baumgardt H.Brodie J.Chilingarian I.,Chomiuk L.den Brok M.Frank M.Hilker M.McDermid R.M.Mieske S.,Neumayer N.Nguyen D.D.Pechetti R.Romanowsky A.J.Spitler L.2019-05-10T12:05:12Z2019-05-06T12:31:59ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyinfrared-astronomygalaxy-kinematicsWe examine the internal properties of the most massive ultracompact dwarf galaxy (UCD), M59-UCD3, by combining adaptive-optics-assisted near-IR integral field spectroscopy from Gemini/NIFS and Hubble Space Telescope (HST) imaging. We use the multiband HST imaging to create a mass model that suggests and accounts for the presence of multiple stellar populations and structural components. We combine these mass models with kinematics measurements from Gemini/NIFS to find a best-fit stellar mass-to-light ratio (M/L) and black hole (BH) mass using Jeans anisotropic models (JAMs), axisymmetric Schwarzschild models, and triaxial Schwarzschild models. The best-fit parameters in the JAM and axisymmetric Schwarzschild models have BHs between 2.5 and 5.9 million solar masses. The triaxial Schwarzschild models point toward a similar BH mass but show a minimum {chi}^2^ at a BH mass of ~0. Models with a BH in all three techniques provide better fits to the central V_rms_ profiles, and thus we estimate the BH mass to be 4.2_-1.7_^+2.1^x10^6^M_{sun}_ (estimated 1{sigma} uncertainties). We also present deep radio imaging of M59-UCD3 and two other UCDs in Virgo with dynamical BH mass measurements, and we compare these to X-ray measurements to check for consistency with the fundamental plane of BH accretion. We detect faint radio emission in M59cO but find only upper limits for M60-UCD1 and M59-UCD3 despite X-ray detections in both these sources. The BH mass and nuclear light profile of M59-UCD3 suggest that it is the tidally stripped remnant of a ~10^9^-10^10^M_{sun}_ galaxy.2018ApJ...858..102Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/858/102CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)B/chandra : The Chandra Archive Log (CXC, 1999-2014)J/A+AS/134/75 : Central Fornax Cluster. II. Galaxy spectrosc. (Hilker+ 1999)J/A+A/383/823 : Radial velocities of UCOs in Fornax (Mieske+, 2002)J/ApJ/655/144 : ACS Virgo Cluster Survey. XIII. (Mei+, 2007)J/ApJS/182/216 : Surface photometry of Virgo ellipticals (Kormendy+, 2009)J/ApJ/725/670 : Kinematics in the M32 nucleus (Seth, 2010)J/AJ/142/199 : Sizes and luminosities of stellar systems (Brodie+, 2011)J/MNRAS/414/3699 : Study of hot stellar systems and galaxies (Misgeld+, 2011)J/ApJS/196/11 : Bulge+disk decompositions of SDSS galaxies (Simard+, 2011)J/ApJS/204/14 : Deep Chandra observations of NGC 4649. I. (Luo+, 2013)J/A+A/570/A2 : Spectra and RVs of nuclear stars (Feldmeier+, 2014)J/MNRAS/443/1151 : AIMSS Project. I. Compact Stellar Systems (Norris+, 2014)J/AJ/149/53 : RVs of 12 Milky Way globular clusters (Kimmig+, 2015)J/ApJ/813/82 : z<0.06 broad-line AGN emission-line measures (Reines+, 2015)J/MNRAS/457/2122 : Nuclear star clusters photometric masses (Georgiev+, 2016)J/ApJ/826/L32 : Black hole masses in megamaser disk galaxies (Greene+, 2016)J/ApJ/819/162 : Chandra obs. of UCDs (Pandya+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/858/102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/858/102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/858/102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/858/102https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/858/102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/858/102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/ApJ/858/102/table3Gemini/NIFS kinematic measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBin[0/108] Bin number associated with goodbin_v2_sn25_bin.fits filemeta.idintXpix[-13.7/13.7] Distance from center in x directionpixpos.angDistancefloatYpix[-15.1/15.1] Distance from center in y directionpixpos.angDistancefloatNpix[1/131] Number of pixels in that binmeta.numberintChi2[0.2/3] Reduced Chi2 valuestat.fit.chi2floatVel[412/479] Measured radial velocitykm/sspect.dopplerVelocfloate_Vel[2/8] Uncertainty in the measured velocitykm/sstat.errorfloatsigma[50/84] Measured velocity dispersionkm/sphys.veloc.dispersionfloate_sigma[2/12] Uncertainty in the velocity dispersionkm/sstat.errorfloath3[-0.11/0.11] Measured skewnessstat.fit.paramfloate_h3[0.02/0.09] Uncertainty in skewnessstat.errorfloath4[-0.2/0.1] Measured kurtosisstat.fit.paramfloate_h4[0.02/0.2] Uncertainty in kurtosisstat.errorfloat