We use cookies to ensure that we give you the best experience on our website. You can change your cookie settings at any time. Otherwise, we'll assume you're OK to continue.

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


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.