[astroseminar at Sapienza] seminar by Alessandro Lupi, Friday Feb 24 at 16 in aula Conversi, Sapienza

[Raffaella Schneider]

Dear Colleagues, 

I apologise if you will receive this announcement multiple times.
I am writing to advertise the following seminar by Alessandro Lupi (details below).
I kindly invite you to forward the information to interested students and colleagues.

Looking forward to meeting you on friday,

All the best

Raffaella

Prof. Raffaella Schneider
raffaella.schneider at uniroma1.it
Dipartimento di Fisica 
Senior Fellow Scuola Superiore di Studi Avanzati Sapienza
Sapienza Università di Roma

%%%%%%%%%%%%%%%%%%%%%
Venerdì 24 Febbrario, ore 16:00, aula Conversi

Speaker: Alessandro Lupi (Università dell’Insubria)

Title: Black hole formation and evolution in high-redshift galaxies

Abstract
The observations of high redshift quasars up to z~7 tell us that massive black holes (MBHs) were already in place, 
with masses well above 10^9 solar masses, when the Universe was less than 1 Gyr old.  
According to the currently accepted framework, MBHs gain most of their mass via radiatively efficient accretion, 
hence we expect they formed early in the Universe as smaller seeds. Explaining how these MBHs formed and 
rapidly grew is particularly challenging, in particular when we also consider that these MBHs seem overmassive 
compared to the local population. After highlighting the main formation mechanisms proposed to date, 
I will discuss whether the peculiar environmental conditions in which these systems form and evolve can 
lead to the formation of massive seeds, and which processes can inhibit this formation mechanism. 
I will then discuss the subsequent evolution of these protogalaxies and their central MBHs up to the observed 
masses, the interaction between the MBH and its galaxy host, and the impact of different observational 
tracers on the apparent obesity of MBHs.
Finally, I will introduce a new state-of-the-art model aimed at addressing the formation and early evolution 
of the first seed BHs, which is able to directly follow stars and BHs at a few tens of Msun resolution, 
including stellar feedback, BH accretion and feedback, and an accurate treatment of BH dynamics.

Collegamento meet (aula conversi): https://meet.google.com/szf-gndu-pwc
%%%%%%%%%%%%%%%%%%%%%