147 citations · 603 across the 19 of their papers we have counts for
19 papers
The chemistry of planetary nebulae in the outer regions of M31
R. L. M. Corradi, K. B. Kwitter, B. Balick +2
We present spectroscopy of nine planetary nebulae (PNe) in the outskirts of M31, all but one obtained with the 10.4m GTC telescope. These sources extend our previous study of the o…
The Present and Future of Planetary Nebula Research. A White Paper by the IAU Planetary Nebula Working Group
K. B. Kwitter, R. H. Méndez, M. Peña +10
We present a summary of current research on planetary nebulae and their central stars, and related subjects such as atomic processes in ionized nebulae, AGB and post-AGB evolution.…
Metal-Rich PNe in the Outer Reaches of M31
Bruce Balick, Karen Kwitter, Romano Corradi +1
Spectroscopic data of two relatively [O III]-luminous-PNe have been obtained with the 10.4-m Gran Telescopio Canarias. M174 and M2496 are each ~1 degree from the center of M31 alon…
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…
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…
Reduce, Reuse, Recycle: Planetary Nebulae as Green Galactic Citizens
K. B. Kwitter, R. B. C. Henry
We review gas-phase abundances in PNe and describe their dual utility as archives of original progenitor metallicity via the alpha elements, as well as sources of processed materia…