We summarize our current knowledge of neutron-star masses and radii. Recent
instrumentation and computational advances have resulted in a rapid increase in the …

Recent developments in the theory of pure neutron matter and experiments concerning the
symmetry energy of nuclear matter, coupled with recent measurements of high-mass …

Magnetars are the strongest magnets in the present universe and the combination of
extreme magnetic field, gravity and density makes them unique laboratories to probe current …

Neutron stars and quark stars are ideal laboratories to study fundamental physics at supra
nuclear densities and strong gravitational fields. Astrophysical observables, however …

One century after its formulation, Einstein's general relativity (GR) has made remarkable
predictions and turned out to be compatible with all experimental tests. Most of these tests …

Microscopic calculations of neutron matter based on nuclear interactions derived from chiral
effective field theory, combined with the recent observation of a 1.97±0.04 M☉ neutron star …

The detection of GW170817 in gravitational waves provides unprecedented constraints on
the equation of state (EOS) of the ultradense matter within the cores of neutron stars (NSs) …

Luminous accreting stellar mass and supermassive black holes produce power–law
continuum X-ray emission from a compact central corona. Reverberation time lags occur …

I review the current status of X-ray reflection (aka broad iron line) based black hole spin
measurements. This is a powerful technique that allows us to measure robust black hole …

X-ray irradiation of the accretion disc leads to strong reflection features, which are then
broadened and distorted by relativistic effects. We present a detailed, general relativistic …