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HST WFPC2 Imaging of Shocks in Superbubbles
C. -H. Rosie Chen, You-Hua Chu, Robert A. Gruendl +1
Bright X-ray emission has been detected in superbubbles in the Large Magellanic Cloud (LMC), and it is suggested that supernova remnants (SNRs) near the inner shell walls are respo…
What Produced the Ultraluminous Supernova Remnant in NGC 6946?
Bryan C. Dunne, Robert A. Gruendl, You-Hua Chu
The ultraluminous supernova remnant (SNR) in NGC 6946 is the brightest known SNR in X-rays, ~1000 times brighter than Cas A. To probe the nature of this remnant and its progenitor,…
HST/WFPC2 and VLT/ISAAC observations of PROPLYDS in the giant HII region NGC 3603
W. Brandner, E. K. Grebel, Y. -H. Chu +6
We report the discovery of three proplyd-like structures in the giant HII region NGC 3603. The emission nebulae are clearly resolved in narrow-band and broad-band HST/WFPC2 observa…
X-rays from Planetary Nebulae
You-Hua Chu, Martin A. Guerrero, Robert A. Gruendl
Two sources of X-ray emission are expected from planetary nebulae: the hot central stars with K, and shocked fast stellar winds at temperatures of 10 K.…
Super-luminous Supernova Remnants
You-Hua Chu, C. -H. Rosie Chen, Shih-Ping Lai
Some extragalactic SNRs are more than two orders of magnitude more luminous than the young Galactic SNR Cas A. These SNRs are called super-luminous or ultra-luminous SNRs. Their hi…
Supernova Remnants in the Magellanic Clouds III: An X-ray Atlas of LMC Supernova Remnants
Rosa Murphy Williams, You-Hua Chu, John R. Dickel +3
We have used archival ROSAT data to present X-ray images of thirty-one supernova remnants (SNRs) in the Large Magellanic Cloud (LMC). We have classified these remnants according to…