53 citations · 54 across the 2 of their papers we have counts for
2 papers
astro-ph.CO2012★ 53 cited
Abundances of PNe in the Outer Disk of M31
Karen B. Kwitter, Emma M. M. Lehman, Bruce Balick +1
We present spectroscopic observations and chemical abundances of 16 planetary nebulae (PNe) in the outer disk of M31. The [O III] 4363 line is detected in all objects, allowing a d…
astro-ph.GA2011★ 1 cited
Abundances of Disk Planetary Nebulae in M31 and the Radial Oxygen Gradient
K. B. Kwitter, E. M. M. Lehman, B. Balick +1
We have obtained spectra of 16 planetary nebulae in the disk of M31 and determined the abundances of He, N, O, Ne, S and Ar. Here we present the median abundances and compare them…