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Browsing by Author "Middleton, M."
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Examining the nature of the ultraluminous X-ray source Holmberg II X-1
Barra, F.; Pinto, C.; Middleton, M.; Di Salvo, T.; Walton, D. J.; Gúrpide, A.; Roberts, T. P. (2024-02-06)We present a comprehensive spectral analysis of the ultraluminous X-ray source Holmberg II X-1 using broadband and high-resolution X-ray spectra taken with the XMM-Newton satellite over a period of 19 yr, taking advantage ... -
Propeller states in locally super-critical ULXs
Middleton, M.; Gurpide, A.; Walton, D. J. (2023-02-01)An expected signature of the presence of neutron stars in the population of ultraluminous X-ray sources (ULXs) are large scale changes in X-ray luminosity, as systems reach spin equilibrium and a propeller state ensues. ...