8 papers
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…
The Planetary Nebula Luminosity Function
Robin Ciardullo
The [O III] 5007 planetary nebula luminosity function (PNLF) occupies an important place on the extragalactic distance ladder: it is the only standard candle that can be applied to…
A CFH12K Survey of Red Giant Stars in the M81 Group
Patrick R. Durrell, Megan E. DeCesar, Robin Ciardullo +2
We present the preliminary results of a wide-field photometric survey of individual red giant branch (RGB) and asymptotic giant branch (AGB) stars in the M81 group, performed with…
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…
Distances from Planetary Nebulae
Robin Ciardullo
The [O III] 5007 planetary nebula luminosity function (PNLF) occupies an important place on the extragalactic distance ladder. Since it is the only method that is applicable to all…
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…