J/ApJ/458/455ivo://CDS.VizieR/J/ApJ/458/455doi:10.26093/cds/vizier.14580455CDSFord H.C.Hui X.Ciardullo R.Jacoby G.H.Freeman K.C.1997-12-09T19:58:06Z1997-12-09T20:58:01ZCDS support team

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

cds-question@unistra.frplanetary-nebulaeWe used the CTIO 4m telescope to make a complete and kinematically unbiased survey of M104 (NGC 4594; the Sombrero galaxy) for planetary nebulae (i.e., stars) out to 16 kpc. We present the positions and monochromatic [O III] lambda 5007 magnitudes of 294 planetaries, and use the observed planetary nebula luminosity function (PNLF) to measure a distance of 8.9+/-0.6Mpc to the galaxy. The luminosity-specific PN number lambda 2.5 in the halo of M104 is approximately 21.7x10^-9^L_{sun}_, which for its color (B-V)=0.95, is comparable to the values in other galaxies. We use the PNLF distance to M104 to compare its luminosity to the luminosities of the brightest galaxies in the Virgo Cluster, finding that if M104 were in the Virgo Cluster, it would be the third brightest galaxy. We combined the PNLF distance and the observed velocity corrected for Virgo infall to calculate a Hubble constant H_0_=91+/-8km/s/Mpc. We also used the PNLF distances to the NGC 1023 group, the Leo group, the Virgo Cluster, and the Fornax Cluster to derive Hubble constants corrected for Virgo infall. The values of H_0_ for M104, the NGC 1023 group, the Virgo Cluster, and the Fornax Cluster are in excellent agreement, suggesting that the PNLF distances and Schechter's linear infall model provide a self-consistent representation of the Hubble expansion and Virgo infall within most regions of the local supercluster. The unweighted mean of the four values is H_0_=84+/-4. The value of H_0_ derived for the Leo group differs by four standard deviations from the mean of the other four measurements. We conclude that there may be large peculiar motions in the spatially extended Leo spur.1996ApJ...458..455Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/458/455CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/458/455https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/458/455http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/458/455https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/458/455https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/458/455http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/458/455GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/458/455/table3 (M 104 planetary nebulae)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/458/455/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/458/455/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/458/455/table3?GETtext/xml+votable180.050000true189.98632083-11.6938750.005555555555555556Cone search capability for table J/ApJ/458/455/table6 (GSC stars in the M 104 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/458/455/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/458/455/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/458/455/table6?GETtext/xml+votable180.050000true190.0326667-11.46583330.005555555555555556Cone search capability for table J/ApJ/458/455/table7 (Secondary reference stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/458/455/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/458/455/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/458/455/table7?GETtext/xml+votable180.050000true189.9512917-11.71752780.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/458/455?format=asciiOpticaldefaultJ/ApJ/458/455/table3M 104 planetary nebulaerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPNIDIdentification number of planetary nebulameta.id;meta.mainintRA2000Right ascension (2000)pos.eq.ra;meta.mainDE2000Declination signpos.eq.dec;meta.mainnullablemagm_5007_ magnitude (1)magphot.mag;em.line.OIIIfloatJ/ApJ/458/455/table6GSC stars in the M 104 fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGSCIdentification number from GSCmeta.id;meta.mainintRA2000Right ascension (2000)pos.eq.ra;meta.mainDE2000Declination signpos.eq.dec;meta.mainnullableVmagV magnitudemagphot.mag;em.opt.VfloatJ/ApJ/458/455/table7Secondary reference starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.maincharRA2000Right ascension (2000)pos.eq.ra;meta.mainDE2000Declination signpos.eq.dec;meta.mainnullable