REVIEW
Search for ultraluminous X-ray sources in nearby galaxies
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classification
astro-ph
keywords
sourcesultraluminousx-raybackgroundbeencurrentdifferentexplain
read the original abstract
Little is presently known about the nature of ultraluminous X-ray sources (ULX). Different hypotheses have been proposed to explain their properties: intermediate-mass BHs, Kerr BHs, young SNR, or background AGN. Some of the current problems and open questions in this research field are here reviewed.
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