[astroseminar at Sapienza] Reminder for the next quid ultra colloquium by Georges Meynet, Wednesday April 6 at 16:30

[Raffaella Schneider]

Dear Colleagues,

this is to gently remind you that the next online colloquium of the series: 

Quid Ultra? Frontiers and Controversies in Astrophysics 

will be today, wednesday, April 6 2022 at 16:30 by Georges Meynet (Geneva University).

Title and abstract are attached below. 

The seminar will be held remotely by the speaker through the following zoom link:

https://uniroma1.zoom.us/j/81122901013?pwd=M1hnRHRXZkEyeW1QMFlPQ2FXa0dNZz09 <https://uniroma1.zoom.us/j/81122901013?pwd=M1hnRHRXZkEyeW1QMFlPQ2FXa0dNZz09>
 
ID riunione: 811 2290 1013
Passcode: 686688
 
The program QUID ULTRA? Frontiers and Controversies in Astrophysics is a series of monthly prestigious colloquia that will be 
running from early February till October 2022. This initiative has been funded by Sapienza University with the co-sponsorship of 
INAF/Astronomical Observatory of Rome and of the joint PhD program in Astronomy, Astrophysics and Space Science of Sapienza, 
Tor Vergata University and INAF.

Looking forward to seeing you soon, 

Raffaella Schneider (on behalf of the SOC)
————————————————
April 6 2022, 16:30

Speaker: Georges Meynet (Geneva University)

Title: Stars at the Extreme: First Stars, Spinstars and Supermassive stars

Abstract:
The presentation will focus on stars at some extreme either from the point of view of their mass (supermassive stars), rotation (spinstars) or initial composition 
(Pop III stars). The talk will begin by a general overview of the main challenges faced by the modeling of massive stars with a special focus on the 
transport processes in convective and radiative zones. Then the presentation will continue discussing recent results about the binary statistics of Pop III 
populations, the chemical and radiative feedback of Pop III stars, the evolution of very massive stars i.e. stars with masses between 150 and 300 solar 
masses at different metallicities addressing the question of the progenitor of Pair Instability supernovae and the limits of the mass domain for the 
black hole mass gap. Finally, new models for the formation of supermassive stars that are candidates as seeds for the formation of supermassive black holes 
at high redshift will be presented.
ly
Phone: +39 06 4991 4312
Skype: raffasch
Zoom: https://uniroma1.zoom.us/j/86080015153?pwd=dlV1eVNsS0xwazlMWTVZV05YeXZyUT09



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