Paweł Szewczyk

Obserwatorium Astronomiczne, Uniwersytet Warszawski

Sesja IV: Obiekty zwarte i astronomia wielozakresowa

Środa 13.09.2023 9:30 – 9:45

abstrakt:
Hypermassive neutron stars are known to be produced in binary neutron star mergers and core-collapse supernovae. Because of strongly differential rotation in the remnants of those events, they can support significantly larger masses than the mass limit for non-rotating NS.
In our work, we explore the limits of dynamical stability of those objects. By means of relativistic hydrodynamical simulations we test the stability against both quasi-radial instaiblities and non-axisymmetrical instabilities. We find solutions stable against a prompt collapse to black hole, which can be interesting sources of gravitational wave emission.