Hypernuclear matter in compact stars (Հիպերոնային և միջուկային նյութը կոմպակտ աստղերում)

Abstract

We discuss the recently developed energy density functional for hypernuclear matter, which is based on simultaneous calculation of heavy single-Λ hypernuclei and compact stars containing hypernuclear core. The nucleonic matter is described in terms of a density-dependent parametrization of nucleon-meson couplings, whereas the hyperonmeson couplings are deduced from the octet model. We identify the parameter space of hyperon-meson couplings for which massive stellar configurations with M ≤ 2.1M  exist and at the same time the laboratory Λ-hypernuclear data can be described.