60 citations · 88 across the 3 of their papers we have counts for
3 papers
X-ray and UV Views of Hot Gas in Planetary Nebulae
You-Hua Chu, Martin A. Guerrero, Robert A. Gruendl
The interior of a planetary nebula (PN) is expected to be filled with shocked fast wind from the central star. This hot gas plays the most important role in the dynamical evolution…
Variable H-alpha Line Emission from the Central Star of the Helix Nebula
Robert A. Gruendl, You-Hua Chu, Ian J. O'Dwyer +1
The central star of the Helix Nebula is a hot white dwarf with unexpected hard X-ray emission. With an effective temperature of ~100,000 K, the star is a powerful source of H-ioniz…
ROSAT observations of X-ray emission from planetary nebulae
Martin A. Guerrero, You-Hua Chu, Robert A. Gruendl
We have searched the entire ROSAT archive for useful observations to study X-ray emission from Galactic planetary nebulae (PNs). The search yields a sample of 63 PNs, which we call…