Effects of short-range nuclear correlations on the deformability of neutron stars

Autor(es)

Souza, Lucas A. ; Dutra, Mariana ; Lenzi, Cesar H. ; Lourenco, Odilon

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW C; v. 101, n. 6, p. 8-pg., 2020-06-18.

Resumo

In the present work, we investigate the effects of short-range correlations (SRC) on the dimensionless deformability of the binary neutron system related to the GW170817 event. We implemented phenomenological SRC in a relativistic mean-field model in which the bulk parameters, namely, incompressibility (K-0), effective nucleon mass ratio (m*), symmetry energy (J), and its slope (L-0), are independently controlled. Our results point out that the SRC favor the model to pass through the constraints, established by the LIGO/Virgo Collaboration, on the values of Lambda(1.4) and on the Lambda(1) x Lambda(2) region. We also found a clear linear correlation between Lambda(1.4) with K-0 and L-0 (increasing dependence), and with m* and J (decreasing dependence). Finally, we also obtained compatible numbers for R-1.4 (model with and without SRC) in comparison with recent data from the neutron star interior composition explorer mission. (AU)

• Processo FAPESP: 19/07767-1 - Reações nucleares com núcleos fracamente ligados ou com estrutura de cluster, radioativos e estáveis
• Beneficiário: Leandro Romero Gasques
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/05660-0 - Estudos teóricos da estrutura e reações de núcleos exóticos e sistemas de muitos corpos
• Beneficiário: Brett Vern Carlson
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/26258-4 - Matéria superdensa no universo
• Beneficiário: Manuel Máximo Bastos Malheiro de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático