J/ApJ/736/65ivo://CDS.VizieR/J/ApJ/736/65doi:10.26093/cds/vizier.17360065CDSTeodorescu A.M.Mendez R.H.Bernardi F.Thomas J.Das P.Gerhard O.2017-06-20T13:15:57Z2013-01-24T09:50:48ZCDS support team

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

cds-question@unistra.frplanetary-nebulaeradial-velocitygalaxiesspectroscopyUsing a slitless spectroscopy method with (1) the 8.2m Subaru telescope and its FOCAS Cassegrain spectrograph and (2) the ESO Very Large Telescope unit 1 (Antu) and its FORS2 Cassegrain spectrograph, we have detected 326 planetary nebulae (PNs) in the giant Virgo elliptical galaxy NGC 4649 (M60) and measured their radial velocities. After rejecting some PNs more likely to belong to the companion galaxy NGC 4647, we have built a catalog with kinematic information for 298 PNs in M60. Using these radial velocities, we have concluded that they support the presence of a dark matter halo around M60. Based on an isotropic, two-component Hernquist model, we estimate the dark matter halo mass within 3R_e_ to be 4x10^11^M_{sun}_, which is almost one-half of the total mass of about 10^12^M_{sun}_ within 3R_e_. This total mass is similar to that estimated from globular cluster, XMM-Newton, and Chandra observations. The dark matter becomes dominant outside. More detailed dynamical modeling of the PN data is being published in a companion paper. We have also measured the m(5007) magnitudes of many of these PNs and built a statistically complete sample of 218 PNs. The resulting PN luminosity function (PNLF) was used to estimate a distance modulus of 30.7+/-0.2mag, equivalent to 14+/-1Mpc. This confirms an earlier PNLF distance measurement based on a much smaller sample. The PNLF distance modulus remains smaller than the surface brightness fluctuation distance modulus by 0.4mag.2011ApJ...736...65Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/736/65CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/84 : Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Acker+, 1992)J/ApJS/182/216 : Surface photometry of Virgo ellipticals (Kormendy+, 2009)J/ApJ/682/135 : CCD photometry of M60 (Lee+, 2008)J/ApJ/356/332 : Planetary nebulae as standard candles. V. (Jacoby+, 1990)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/736/65https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/736/65http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/736/65https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/736/65https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/736/65http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/736/65GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/736/65/pne (PN candidates studied)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/736/65/pne?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/736/65/pne?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/736/65/pne?GETtext/xml+votable180.050000true190.89437511.59088890.0055555555555555566/27907https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/736/65?format=asciiOpticaldefaultJ/ApJ/736/65/pnePN candidates studiedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[3/2042] Identification numbermeta.id;meta.mainintNCGNGC designation of most likely parent galaxy: 4649 (=M60) or 4647meta.id.parentintnullableRAJ2000[12] Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[11] Degree of declination (J2000)pos.eq.dec;meta.mainxGx, G coordinate from center of M60 (1)arcsecpos;arith.diffintyGy, G coordinate from center of M60 (1)arcsecpos;arith.diffintHRV[279/1690] Heliocentric radial velocity (2)km/sspect.dopplerVeloc;pos.heliocentricintm5007[26.3/28.2]? magnitude m(5007) (3)magphot.mag;em.line.OIIIfloatnullableSimbadSimbad column added by the CDSmeta.refchar