J/ApJ/721/369ivo://CDS.VizieR/J/ApJ/721/369doi:10.26093/cds/vizier.17210369CDSTeodorescu A.M.Mendez R.H.Bernardi F.Riffeser A.Kudritzki R.P.2017-11-28T13:21:46Z2012-08-22T12:08:29ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomyplanetary-nebulaeradial-velocityastronomical-object-identificationspectroscopyUsing a slitless spectroscopy method with the 8.2m Subaru telescope and its FOCAS Cassegrain spectrograph, we have increased the number of planetary nebula (PN) detections and PN velocity measurements in the flattened elliptical galaxy NGC 821. A comparison with the detections reported previously by the Planetary Nebulae Spectrograph group indicates that we have confirmed most of their detections. The velocities measured by the two groups, using different telescopes, spectrographs, and slitless techniques, are in good agreement. We have built a combined sample of 167 PNs and have confirmed the Keplerian decline of the line-of-sight velocity dispersion reported previously. We also confirm misaligned rotation from the combined sample. A dark matter halo may exist around this galaxy, but it is not needed to keep the PN velocities below the local escape velocity as calculated from the visible mass. We have measured the m(5007) magnitudes of 145 PNs and produced a statistically complete sample of 40 PNs in NGC 821. The resulting PN luminosity function (PNLF) was used to estimate a distance modulus of 31.4mag, equivalent to 19Mpc.2010ApJ...721..369Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/721/369CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/284 : The USNO-B1.0 Catalog (Monet+ 2003)J/MNRAS/394/1249 : New PNe in 6 early-type galaxies (Coccato+, 2009)J/MNRAS/385/361 : BVRcIc photometry of NGC 821 globular clusters (Spitler+,https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/721/369https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/721/369http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/721/369https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/721/369https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/721/369http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/721/369GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/721/369/table2 (Detected PN candidates in NGC 821)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/721/369/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/721/369/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/721/369/table2?GETtext/xml+votable180.050000true32.032416710.99486940.0055555555555555566/520 18269https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/721/369?format=asciiOpticaldefaultJ/ApJ/721/369/table2Detected PN candidates in NGC 821recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[101/280] FOCAS numbermeta.id;meta.mainintPNS? PN.S number (<PNS-EPN NGC821-NNN> in Simbad)meta.id.crossintnullableRAJ2000[2] Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[10/11] Degree of declination (J2000)pos.eq.dec;meta.mainm5007? m(5007) magnitude (1)magphot.mag;em.line.OIIIfloatnullableHRV? Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricintnullableNote[ab] Notes (2)meta.notecharSimbadSimbad column added by the CDSmeta.refchar