Browsing by Author "Middleton, M."

Now showing items 1-2 of 2

    • 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. ...