119 citations · 141 across the 2 of their papers we have counts for
4 papers
Kinematic Evidence for Halo Substructure in Spiral Galaxies
Kimberly A. Herrmann, Robin Ciardullo, Steinn Sigurdsson
We present the results of a kinematic study of planetary nebulae in the extreme outskirts of two spiral galaxies, M83 (NGC 5236) and M94 (NGC 4736). We find that in the inner regio…
Planetary Nebulae in Face-On Spiral Galaxies. I. Planetary Nebula Photometry and Distances
Kimberly A. Herrmann, Robin Ciardullo, John J. Feldmeier +1
As the first step to determine disk mass-to-light ratios for normal spiral galaxies, we present the results of an imaging survey for planetary nebulae (PNe) in six nearby, face-on…
Planetary Nebula Studies of Face-On Spiral Galaxies: Is the Disk Mass-to-Light Ratio Constant?
Kimberly A. Herrmann, Robin Ciardullo
When astronomers study the dark matter halos of spiral galaxies, they normally assume that the disk mass-to-light ratio is *constant*. We describe a method of analyzing the kinemat…
The Planetary Nebula System of M33
Robin Ciardullo, Patrick R. Durrell, Mary Beth Laychak +4
We report the results of a photometric and spectroscopic survey for planetary nebulae (PNe) in the Local Group spiral galaxy M33. We use our sample of 152 PNe to derive an [O III]…