ELFT HÍRADÓ

[somogyi <somogyi.gabor AT wigner.hu>]

Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk


                  Noshad Khosravi Largani
                  (University of Wroclaw)


"Universal relations in astrophysics"


     címmel tartandó szemináriumára.


Kivonat:



Since the very first detection of gravitational waves from a binary 
neutron star merger, in August 2017, the field of relativistic 
computational astrophysics has gained increasing attention. However, 
theoretical studies of compact stars, such as (proto)neutron stars, 
core-collapse supernovae, and binary neutron star mergers, have to deal 
with one caveat, namely, the yet incompletely known equation of state. 
In particular at high baryon density. The equation of state defines not 
only bulk properties of matter, such as pressure, energy density, and 
entropy but also transport properties, relevant for the treatment of 
neutrino. It is therefore of fundamental interest to define global 
parameters of compact stars, which can be related via empirical 
relations being independent of the equation of state. These are known as 
universal relations. In this talk, I will revisit the concept of 
universality in the context of rapidly and non-rotating neutron stars. 
Particular interest will be devoted to systems that feature a 
hadron-quark matter phase transition. I will further report on recent 
results of astroseismology related to the mode analysis of core-collapse 
supernovae simulations. These modes are excited due to various 
phenomena, e.g., radial oscillations of the central protoneutron star 
and the propagation of pressure waves, which indicate the presence of a 
possible universality too.



Helye: Wigner FK RMI III. ép. Tanácsterem
Ideje: 2022 június 17 péntek  d.u. 14 óra

Szívesen látunk minden érdeklődőt.


                             Somogyi Gábor