Seminars : Documents

Dense Matter inside Neutron Stars: Constraints from Astrophysical Observations
Prasanta Char (ULiège)

Neutron stars are the densest object found in the observable universe. They are proven to be excellent laboratories to study the physics of matter at extreme conditions which are beyond the scope of any terrestrial experiments. Recent multimessenger observations of neutron stars such as the measurements of the tidal deformability from the gravitational wave event GW170817, the X-ray observations of the mass and radius of the object J0030+0451 by the Neutron Star Interior Composition Explorer (NICER) instrument aborad the International Space Station along with the discoveries of massive radio pulsars with ∼ 2M⊙ in the last decade have significant implications towards the understanding the equation of state of dense nuclear matter. In this talk, I will discuss how these information are combined with the low energy nuclear experimental data to constrain the properties and the composition of the interior of neutron stars. I will also review the correlation between certain nuclear empirical parameters such as the symmetry energy, incompressibility with the macroscopic structure parameters such as the radius, tidal deformability of the star.