| Abstract : | Neutron stars (NSs) provide a wide window into the properties of dense nuclear matter. Gravitational waves (GWs) detected from binary compact star merger events (GW170817, GW190425) and subsequent estimations of tidal deformabilities play a key role in constraining the behaviour of dense matter at high density regimes. Massive compact star candidates, with mass ~ 2 solar mass set strict bounds on the dense matter equation of state. The possibility of heavier strange and non-strange baryons inclusion constrain the theoretical models of nuclear matter comportment at large density regimes. Another important aspect in dense matter studies is the presence of strange quark matter in compact objects.
The coupling restrictions for hyperonic sector are extracted from Lambda and Cascade hypernuclei experiments and those in Delta-resonances from scattering off nuclei and heavy ion collision data. In this work, for the hadronic sector, we analyse coupling parametrizations from two classes based on covariant density functional models: non-linear (NL) and density-dependent schemes (DD). The DD coupling models considered in this work are found to support the observed NS structure features in addition to terrestrial findings. While in case of quark sector, we consider modified bag model and vector bag model with and without self interaction and investigated dense matter in context with recent astrophysical observable constraints based on NICER and GW observations. |
