We investigate the impact of the time-dependent moment of inertia on the braking index of pulsars. We assume the moment of inertia to be slowly varying in time and we explore how much must the moment of inertia change to explain the currently measured values of the braking index.
I will discuss developments with this
Recent constraints from neutron star measurements and nuclear experiments have narrowed the allowed physical regions for the compact stars equation of state (EoS) resulting in some of the well established models being less probable than before. These new constraints include the NICER mass-radius measurement of the object PSR J0740+6620, whereas laboratory experiments like Spectral Pion Ratio...
Some accreting neutron stars may produce near-Eddington luminosity. In general relativity, the atmosphere of a sufficiently luminous neutron star is disconnected from and levitates above its surface. The atmosphere is centered at a radius where the gravitational and radiation forces balance each other. On the other hand, in a number of space-time metrics in the case of naked singularities,...
We model an ultraluminous X-ray source using a global 2D axisymmetric general relativistic radiation magnetohydrodynamic simulation of super-Eddington accretion onto a neutron star with a 10 billion Gauss dipolar magnetic field. We found that the magnetic confinement of the gas into accretion columns along with the interaction of the gas with the neutron star surface produce a total luminosity...
The equation of state (EoS) of matter at supranuclear densities in the core of neutron stars (NSs) contains key information on the properties of the strong force and the possible existence of exotic states of matter; however it is only poorly constrained from earth-based experiments and theory. NS properties, the precise
values of M and R in particular, encode unique information on the EoS,...