ELFT HÍRADÓ

[Balog Janos <balog.janos AT wigner.mta.hu>]

MTA Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk



                             M. Bejger
          (N. Copernicus Astronomical Center, Warsaw, Poland)

         "Observational implications of dense matter phase transitions 
for the
                  rotational evolution of neutron stars"


                címmel tartandó szemináriumára.


Kivonat:
I will discuss the implications of a strong first-order
phase transition region in the dense matter equation of state in the
interiors of rotating neutron stars, and the resulting creation of two
disjoint families of neutron-stars' configurations (the so-called
high-mass twins). Rotating, axisymmetric and stationary stellar
configurations are obtained numerically in the framework of general
relativity, and their global parameters and stability are studied. The
equation of state-induced instability divides stable neutron star
configurations into two disjoint families: neutron stars (second
family) and hybrid stars (third family), with an overlapping region in
mass, the high-mass twin star region. These two regions are divided by
an instability strip. Its existence has interesting astrophysical
consequences for rotating neutron stars. It provides a "natural"
explanation for the rotational frequency cutoff in the observed
distribution of neutron stars spins, and for the apparent lack of
back-bending in pulsar timing. It also straightforwardly enables a
substantial energy release in a mini-collapse to another neutron-star
configuration (core quake), or to a black hole.

Based on arXiv:1608.07049


Helye: MTA Wigner FK RMI III.ép. Tanácsterem
Ideje: 2016. október 7  péntek du. 14:00 óra



Szívesen látunk minden érdeklődőt.

                                            Balog János