Kolloquien
Sommersemester 2018
URL to ICS calendar of this seminar
Kirchhoff-Institut für Physik, Otto-Haxel-Hörsaal
Friday 17:15
Talks
20.4.2018 17:00
KIP, INF 227, Otto-Haxel-Hörsaal
Densities in neutron star cores can reach up to ten times the density of a normal atomic
nucleus, and the stabilising effect of gravitational confinement
permits long-timescale
weak interactions. This generates matter that is neutron-rich, and opens up the
possibility of stable states of strange matter.
Our uncertainty about the nature of matter
under these conditions is encoded in the Equation of State, which can be linked to
macroscopic observables like mass, radius, tidal deformation or moment of
inertia.
One very promising technique for measuring the EOS exploits hotspots that
form on the neutron star surface due to the pulsar mechanism, accretion streams, or
during thermonuclear explosions in the neutron star ocean.
I will explain how the
hotspot technique is being used by NICER, an X-ray instrument installed only a few
months ago on the International Space Station -
and why it is a mission driver for future
large area X-ray telescope concepts such as eXTP and STROBE-X.