ELFT HÍRADÓ

[Somogyi Gábor <somogyi.gabor AT wigner.hun-ren.hu>]

Wigner FK RMI Elméleti Osztály Szemináriuma [SZOKÁSOSTÓL ELTÉRŐ HELYSZÍN]
Tisztelettel meghívjuk


        Wolf György
        (HUN-REN Wigner FK)


"Astrophysical constraints on the cold equation of state of the strongly 
interacting matter”


címmel tartandó szemináriumára.


Kivonat:



At present, the only experimental access to the properties of cold, 
dense strongly interacting matter is provided by astrophysical 
observations. Neutron stars are the only known systems in the Universe 
that reach densities several times higher than normal nuclear density at 
nearly zero temperature, making them unique laboratories for studying 
dense matter. Since most neutron star observables are sensitive to the 
equation of state (EOS), observational data place stringent constraints 
on the EOS of strongly interacting matter.

In this talk, we investigate constraints arising from perturbative QCD 
calculations at asymptotically high densities ($\rho\approx 40 \rho_0$), 
the mass of the heaviest observed neutron star (a black widow pulsar), 
NICER mass–radius measurements, and the tidal deformability inferred 
from the binary neutron star merger GW170817. We parametrize the EOS and 
allow its parameters to vary freely, using observational data to 
constrain the admissible parameter space. We find that neutron star 
observations significantly restrict the EOS of dense strongly 
interacting matter. While NICER has already provided measurements for 
five pulsars, the associated uncertainties remain relatively large. 
Within our modeling framework, we find that the existence of very 
massive neutron stars and constraints on the tidal deformability provide 
the most restrictive constraints on the EOS.



Helye: Wigner FK RMI II. ép. Médiaterem [SZOKÁSOSTÓL ELTÉRŐ HELYSZÍN]
Ideje: 2026 május 29. péntek d.u. 14 óra

Szívesen látunk minden érdeklődőt.


                  Somogyi Gábor