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astro-ph2004
How Universal is the Gunn-Peterson Trough at z~6?: A Closer Look at the Quasar SDSS J1148+5251
S. Peng Oh, Steven R. Furlanetto
Detectable flux is visible in the Ly-alpha and Ly-beta troughs of the highest redshift () quasar found to date, SDSS J1148+5251. This has previously been interpreted as con…
astro-ph2004
Excess Ionization and Soft X-ray Emission from Cooling Flow Clusters
S. Peng Oh
X-ray spectroscopy of cooling-flow clusters reveal an unexpected deficit of soft X-ray emission lines from gas at ~1/3 of the ambient plasma temperature, across a wide range of X-r…