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2023-10-17 Jorick Vink (Armagh Observatory and Planetarium)

How Heavy is the Most Massive Star in the Universe?


Very massive stars (VMS) are dominant sources of ionising radiation. The prime difference between VMS in our local Universe and those in the Early Universe is their metallicity (Z), which leads to differences in stellar formation, wind mass loss, stellar evolution and explosions.

I will discuss how these differences lead to novel outcomes for stellar yields, the black hole mass spectrum, as well as the stellar upper-mass limit.