Year: 2023
Type: article
Abstract: In this work, we study the thermal evolution of twin star pairs, i.e., stars that present the same mass but different radius and compactness. We collect available equations of state that give origin to a second branch of stable compact stars with quarks in their core. For each equation of state, we investigate the particle composition inside stars and how differently each twin evolves over time, which depends on the central density/pressure and consequent crossing of the threshold for the Urca cooling process. We find that, although the general stellar thermal evolution depends on mass and particle composition, within one equation of state, only twin pairs that differ considerably on compactness can be clearly distinguished by how they cool down.
Source: Physical Review C
Authors: F. Lyra, L. Moreira, R. Negreiros, R. O. Gomes, V. Dexheimer
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, European Cooperation in Science and Technology, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Instituto Nacional de Ciência e Tecnologia: Física Nuclear e Aplicações
Awards: G1686041357, G1759509370, G1840770272, G2530734026, G3588731312, G3722196896, Frameworks: MUSES, Modular Unified Solver of the Equation of State, G3978731422, G429285467, G5111998950, G5232016159, G5838893351, G5967556063, Nuclear Physics from Multi-Messenger Mergers (NP3M), G7418193128, G797411214, G875031243, CAREER: Dense Phases in Neutron Stars
OpenAlex ID: W4322626317