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A Search for Jovian Planets around Hot White Dwarfs
Y. -H. Chu, B. C. Dunne, R. A. Gruendl +1
Current searches for extrasolar planets have concentrated on observing the reflex Doppler shift of solar-type stars. Little is known, however, about planetary systems around non-so…
A Critical Examination of Hypernova Remnant Candidates in M101. I. MF83
Shih-Ping Lai, You-Hua Chu, C. H. Rosie Chen +2
The SNR candidate MF83 in M101 is coincident with a very luminous X-ray source. Based on the high X-ray luminosity, it has been suggested that MF83 is a "hypernova remnant" requiri…
The Supergiant Shell LMC2: II. Physical Properties of the 10^6 K Gas
S. D. Points, Y. -H. Chu, S. L. Snowden +1
LMC2 has the highest X-ray surface brightness of all know supergiant shells in the Large Magellanic Cloud (LMC). The X-ray emission peaks within the ionized filaments that define t…
The He II Emitting Nebula N44C in the LMC: Optical/UV Spectroscopy of the Nebula and its Ionizing Star
Donald R. Garnett, Vanessa C. Galarza, You-Hua Chu
We present HST spectroscopy and imaging, along with new ground-based spectroscopy and ROSAT HRI imaging, of the He II emitting nebula N44C and its ionizing star. A GHRS spectrogram…
A Morphological Diagnostic for Dynamical Evolution of Wolf-Rayet Bubbles
Robert A. Gruendl, You-Hua Chu, Bryan C. Dunne +1
We have observed H-alpha and [OIII] emission from eight of the most well defined Wolf-Rayet ring nebulae in the Galaxy. We find that in many cases the outermost edge of the [OIII]…
Resolving SNR 0540-6944 from LMC X-1 with Chandra
Rosa Murphy Williams, Robert Petre, You-Hua Chu +1
We examine the supernova remnant (SNR) 0540-697 in the Large Magellanic Cloud (LMC) using data from the Chandra ACIS. The X-ray emission from this SNR had previously been hidden in…