7 papers · 1 filter
The PNLF distance to the Sculptor Group galaxy NGC 55
G. C. Van de Steene, G. H. Jacoby, C. Praet +2
We identified 21 new Planetary Nebula (PN) candidates in the Sculptor Group galaxy NGC 55. We determined a most likely distance of 2.00 +/- 0.2 Mpc using the Planetary Nebulae Lumi…
Intracluster Planetary Nebulae in Clusters and Groups
John J. Feldmeier, Robin B. Ciardullo, George H. Jacoby +2
We present the results from multiple surveys for intracluster planetary nebulae (IPNe) in nearby galaxy clusters and groups. We find that in the case of clusters, our observations…
A Measurement of the Contamination in [OIII] lambda 5007 Surveys of Intracluster Stars and the Surface Density of z=3.13 Ly-alpha Galaxies
Robin Ciardullo, John Feldmeier, Kara Krelove +2
We present two pieces of evidence supporting the hypothesis that the bright [OIII] lambda 5007 sources found in Virgo's intracluster space are intracluster planetary nebulae, rathe…
Intracluster Planetary Nebulae in the Virgo Cluster
K. C. Freeman, M. Arnaboldi, M. Capaccioli +8
We briefly describe the properties of the confirmed spectroscopic sample of intracluster planetary nebulae recently discovered in the Virgo cluster. We find 23 bonafide intracluste…
Spectra of planetary nebulae in NGC 5128 (Centaurus-A)
J. R. Walsh, N. A. Walton, G. H. Jacoby +1
Low dispersion spectra have been obtained of five planetary nebulae in the elliptical galaxy NGC 5128 (Centaurus-A) from the catalogue of Hui et al. (1993). The planetary nebulae (…
A Survey for Low Surface Brightness Dwarf Galaxies Around M31
Taft E. Armandroff, James E. Davies, George H. Jacoby
By applying a digital filtering technique to 1550 square degrees of the POSS-II in the vicinity of M31, we found two previously unidentified very low surface brightness dwarf galax…