Browsing University of Hertfordshire by Author "D'Aì, A."

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    • Unveiling the disc structure in ultraluminous X-ray source NGC 55 ULX-1 

      Barra, F.; Pinto, C.; Walton, D. J.; Kosec, P.; D'Aì, A.; Salvo, T. Di; Santo, M. Del; Earnshaw, H.; Fabian, A. C.; Fuerst, F.; Marino, A.; Pintore, F.; Robba, A.; Roberts, T. P. (2022-11-01)
      Despite two decades of studies, it is still not clear whether ULX spectral transitions are due to stochastic variability in the wind or variations in the accretion rate or in the source geometry. The compact object is also ...