The Modern Physics of Compact Stars and Relativistic Gravity 2021

Equation of State table with exotic matter for supernova and neutron star merger

29 Sept 2021, 16:05

35m

Yerevan, Armenia

Speaker

SARMISTHA BANIK (Birla Institute of Technology and Sciences)

Description

We develop a new equation of state (EoS) table involving thermal (anti)kaons, Bose-Einstein condensate of $K^{-}$ mesons and $\mathrm{\Lambda }$-hyperons for core-collapse supernova and neutron star merger simulations. This EoS table is based on a finite temperature density-dependent relativistic hadron field theory where baryon-baryon interaction is mediated by scalar $\sigma$, vector $\omega$ and
$\rho$ mesons, using the parameter set DD2 for nucleons. The repulsive hyperon-hyperon interaction is mediated by an additional strange $\varphi$ meson. The EoS for the $K^{-}$ condensed matter is also calculated within the framework of relativistic mean field model, whereas the low-density, inhomogeneous matter is calculated in the extended Nuclear Statistical Equilibrium model (NSE). The EoS
table is generated for a wide range of values of three parameters - baryon
density (${10}^{-12}$ to $\sim$ 1 fm${}^{-3}$), positive charge fraction(0.01 to 0.60) and temperature(0.1 to 158.48 MeV).

Presentation materials

Banik_MPCS2021.pdf