Hyperons in neutron stars and supernova cores

Abstract

The properties of compact stars and their formation processes depend on many physical ingredients. The composition and the thermodynamics of the involved matter is one of them. We will investigate here uniform strongly interacting matter at densities and temperatures, where potentially other components than free nucleons appear such as hyperons, mesons or even quarks. In this paper we will put the emphasis on two aspects of stellar matter with non-nucleonic degrees of freedom. First, we will study the phase diagram of baryonic matter with strangeness, showing that the onset of hyperons, as that of quark matter, could be related to a very rich phase structure with a large density domain covered by phase coexistence. Second, we will investigate thermal effects on the equation of state (EoS), showing that they favor the appearance of non-nucleonic particles. We will finish by reviewing some recent results on the impact of non-nucleonic degrees freedom in compact star mergers and core-collapse events, where thermal effects cannot be neglected.

20 pages, 14 figures, contribution to the EPJA topical issue "Exotic matter in neutron stars"

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Cited by in corpus (50)

• Equations of state for supernovae and compact stars
• Neutron Stars and the Nuclear Equation of State
• Dense Nuclear Matter Equation of State from Heavy-Ion Collisions
• Astrophysical Axion Bounds: The 2024 Edition
• A new temperature dependent hyperonic equation of state: application to rotating neutron star models and I-Q-relations
• Heavy Baryons in Compact Stars
• The Science of the Einstein Telescope
• Proto-neutron stars with heavy baryons and universal relations
• Coupled-channel effects in hadron-hadron correlation functions
• Lambda-nuclear interactions and hyperon puzzle in neutron stars
• Nuclear Equation of state for Compact Stars and Supernovae
• Maximum mass of compact stars from gravitational wave events with finite-temperature equations of state
• Equation of State and Progenitor Dependence of Stellar-Mass Black-Hole Formation
• Equations of state for hot neutron stars -- II. The role of exotic particle degrees of freedom
• Hypernuclear stars from relativistic Hartree-Fock density functional theory
• Impact of the nuclear symmetry energy on the post-merger phase of a binary neutron star coalescence
• $\Delta$-admixed neutron stars: spinodal instabilities and dUrca processes
• Bayesian inference of signatures of hyperons inside neutron stars
• Flavor Violating Axions in the Early Universe
• Consequences of neutron decay inside neutron stars
• Supernova Constraints on Dark Flavored Sectors
• The internal composition of proto-neutron stars under strong magnetic fields
• Role of vector channel in different classes of (non) magnetized neutron stars
• Constant entropy hybrid stars: a first approximation of cooling evolution
• Thermal behavior as indicator for hyperons in binary neutron star merger remnants
• Hybrid stars are compatible with recent astrophysical observations
• Equation of state and composition of proto-neutron stars and merger remnants with hyperons
• Novel neutron decay mode inside neutron stars
• Exotic Baryons in Hot Neutron Stars
• Axion emission from strange matter in core-collapse SNe
• Hot neutron stars and their equation of state
• Microscopic nuclear equation of state at finite temperature and stellar stability
• Hyperon threshold and stellar radii
• Composition of nuclear matter with light clusters and Bose-Einstein condensation of $\alpha$ particles
• Frequencies of $f$- and $p$-oscillation modes in cold and hot compact stars
• Maximum latent heat of neutron star matter independently of General Relativity
• Hyperons in the pasta phase
• Neutron Skins: Weak Elastic Scattering and Neutron Stars
• A closer look at the Yukawa's interaction from a symmetry group perspective
• Quark matter with strong magnetic field and possibility of the third family of compact stars
• The impact of hyperons on neutron star mergers: gravitational waves, mass ejection and black hole formation
• Properties of rapidly rotating hot neutron stars with antikaon condensates at constant entropy per baryon
• Hyperonization in compact stars
• Bayesian inference of nuclear incompressibility from collective flow in mid-central Au+Au collisions at 400--1500 MeV/nucleon
• F-mode Oscillations of Neutron Stars with Dark Matter from Neutron Decay: Implications for Gravitational-Wave Detectability
• Effect of hyperons on phase coexistence in strange matter
• Maximum latent heat of neutron star matter without GR
• On the Destabilization of High-Mass Neutron Stars by the Emergence of $d^{\ast }$-Hexaquarks
• Supernova Constraints on Dark Flavored Sectors
• Neutrino mean free path in neutron stars in the presence of hyperons