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Warm Gas and Ionizing Photons in the Local Group
Philip R. Maloney, J. Bland-Hawthorn
We investigate how much warm (T \sim 10^6 K) gas may exist in a Local Group corona, and, in particular, whether such a corona could be detected indirectly through its ionizing radi…
Ionizing Photon Sources within the Local Group
Philip R. Maloney, J. Bland-Hawthorn
We review the possible sources of ionizing photons within the Local Group. Throughout most of the LG volume, the cosmic background radiation will dominate, but locally (e.g., withi…
The Metagalactic Ionizing Field in the Local Group
J. Bland-Hawthorn
We discuss the sources which are likely to dominate the ionizing field throughout the Local Group. In terms of the limiting flux to produce detectable H-alpha emission (4-10 x 10**…
A Technique for Narrowband Time Series Photometry: the X-ray Star V2116 Oph
Eric W. Deutsch, Bruce Margon, Joss Bland-Hawthorn
We have used innovative features of the Taurus Tunable Filter instrument on the 3.9-m Anglo-Australian Telescope to obtain nearly-continuous, high-throughput, linear photometry of…