67 citations · 614 across the 34 of their papers we have counts for
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astro-ph2004
A close binary nucleus in the most oxygen-poor planetary nebula PN G 135.9+55.9
G. H. Tovmassian, R. Napiwotzki, M. G. Richer +3
We report FUSE and new deep optical spectroscopic observations of PN G 135.9+55.9, the most oxygen-poor planetary nebula located in the Galactic halo. These observations allow us t…
astro-ph2004
Planetary Nebulae as Probes of the Chemical Evolution of Dynamically Hot Systems
Michael G. Richer, Marshall L. McCall
The measurement of chemical abundances in planetary nebulae in nearby galaxies is now relatively straightforward. The challenge is to use these chemical abundances to infer the che…