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Durham University

Department of Physics

Staff profile

Publication details for Prof Tim Roberts

Gladstone, J.C., Roberts, T.P. & Done, C. (2011). Unlocking the nature of ultraluminous X-ray sources using their X-ray spectra. Astronomische Nachrichten 332(4): 345-348.

Author(s) from Durham

Abstract

We explore the nature of ultraluminous X-ray sources through detailed investigations of their spectral shape using some of the highest quality data available in the XMM-Newton public archives. Phenomenological models allow us to characterise their spectra, while more ‘physically-motivated’ models enable us to explore the physical processes underlying these characteristics. These physical models imply the presence of extreme (probably super-Eddington) accretion on to stellar mass black holes.