Luca Zampieri - Ultraluminous X-ray Sources: The most extreme X-ray binaries

Ultraluminous X-ray Sources:
The most extreme X-ray binaries

Luca Zampieri
INAF - Astronomical Observatory of Padova 

Despite the impressive advancements occurred in recent years, the existence of Ultraluminous X-ray sources (ULXs) represents still a theoretical challenge in modern Astrophysics. Likely the majority of them are the most extreme version of an X-ray binary, with a Black Hole in a mass range or in an accretion regime so far unexplored.

Here I will review our present understanding of ULXs, discuss some potential pathways to their formation and summarize possible future observational and theoretical prospects.

 

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