IvS Seminar 30/05/2024: Nikolay Britavskiy

Nikolay Britavskiy - "Looking up at the fast rotation of massive stars, can we see something?" (IvS seminar 30/05/2024)
Abstract: The initial distribution of rotational velocities of stars is still poorly known, and how the stellar spin evolves from birth to the various endpoints of stellar evolution is an actively debated topic. Binary interactions are often invoked to explain the existence of extremely fast-rotating stars. Nevertheless, the recent detections of pre-interacting binaries with primaries as fast rotators are puzzling our understanding of the initial stellar rotation distribution in the OB-type domain. Thus, it is important to understand what is the "true" original rotation distribution of stars that have not passed any binary interaction yet. To do so, I will introduce the population of fast-rotating Galactic OB-type stars, and we will look at how exactly we can approach them in terms of revealing their origin. The ultimate goal is to shape up the resulting morphology of the vsini distribution that different stellar environments can have.