The nature of extreme X-ray to optical ratio sources (EXOs)
This thesis presents a study of a sample of objects with a high X-ray-to-optical flux ratio, which are believed to be a good tracer of highly obscured, high redshift active galaxies (AGN). Such objects have particular importance since they may account for a significant fraction of the accretion hist...
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University of Leicester
2010
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| Online Access: | http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520159 |