Non - Non-stellar Black Holes 1 Mini-black holes 2...

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Unformatted text preview: Non-stellar Black Holes 1. Mini-black holes 2. Intermediate black holes – the following information comes form the March 8 th , 2004 issue of “Aviation and Space Technology”. Researchers using the orbiting Chandra X-ray Observatory think they may have found a whole new class of black holes, which appear to be pumping our X-rays with power comparable to that of hotter X-ray sources. The “quasi-soft” X-ray sources – found to comprise 15-20% of X-ray sources in four different galaxies studied with Chandra – have temperatures 1-4 million deg. C., much cooler than the 10-100-million deg. C. temperatures produced by “hard” sources like neutron stars and stellar-mass black holes. “The challenge raised by the discovery of these sources is to understand how they produce so much X-ray power form temperatures of a few million degrees,” said Rosanne Di Stefano of the Harvard-Smithsonian Center for Astrophysics and Tufts University. One possibility is that the X-rays are coming from hard sources surrounded and Tufts University....
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