Short-range correlations in a hadronic metamodel: nuclear and stellar matter description

• Grant number: 22/03575-3
• Support Opportunities: Scholarships abroad - Research
• Start date: December 13, 2022
• End date: November 12, 2023
• Field of knowledge: Physical Sciences and Mathematics - Physics - Nuclear Physics
• Principal Investigator: Odilon Lourenço da Silva Filho
• Grantee: Odilon Lourenço da Silva Filho
• Host Investigator: Jerome Margueron
• Host Institution: Divisão de Ciências Fundamentais (IEF). Instituto Tecnológico de Aeronáutica (ITA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil
• Institution abroad: Université Claude Bernard Lyon 1, France
• Associated research grant: 17/05660-0 - Theoretical studies of the structure and reactions of exotic nuclei and many-body systems, AP.TEM

Abstract

The project aims at better understanding the recent neutron stars (NSs) observations with refined models for dense matter. Since the symmetry energy plays a crucial role in the description of NS matter (beta equilibrium in very neutron rich matter), we will study the role of the short range correlations (SRC) on the symmetry energy first, and then on the observations of NSs. Moreover, the composition of the central core of massive NSs is still unknown. It however plays a very important role in the compactness of the stellar object. We will therefore explore several scenarios for phase transitions, such as delta resonances, hyperons, pion and kaon condensate, as well as the quarkyonic model applied to NS matter. Finally, the possibility that part of the NS gravitational mass exists as dark matter will also be investigated. At the end of this project, an extensive analysis of the consequences of all dense matter properties explored will be performed for various observational data, such as the tidal deformability in NS mergers, the cooling of NSs, and the NSs giant glitches. (AU)

Scientific publications

(5)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DUTRA, MARIANA; LOURENCO, ODILON; MARGUERON, JEROME. Finite Temperature Description of Fermi Gases with In-medium Effective Mass. ASTROPHYSICAL JOURNAL, v. 952, n. 1, p. 9-pg., 2023-07-01. (22/03575-3, 17/05660-0)

LENZI, C. H.; DUTRA, M.; LOURENCO, O.; LOPES, L. L.; MENEZES, D. P.. Dark matter effects on hybrid star properties. EUROPEAN PHYSICAL JOURNAL C, v. 83, n. 3, p. 11-pg., 2023-03-30. (22/03575-3, 17/05660-0, 20/05238-9)

DE MOURA SOARES, BRUNO A.; LENZI, CESAR H.; LOURENCO, ODILON; DUTRA, MARIANA. Bayesian analysis of a relativistic hadronic model constrained by recent astrophysical observations. Monthly Notices of the Royal Astronomical Society, v. 525, n. 3, p. 11-pg., 2023-09-01. (22/03575-3, 17/05660-0, 20/05238-9)

CARLSON, BRETT V.; DUTRA, MARIANA; LOURENCO, ODILON; MARGUERON, JEROME. Low-energy nuclear physics and global neutron star properties. PHYSICAL REVIEW C, v. 107, n. 3, p. 24-pg., 2023-03-22. (22/03575-3, 17/05660-0, 20/05238-9)

RODRIGUES, E. H.; DUTRA, M.; LOURENCO, O.. Recent astrophysical observations reproduced by a short-range correlated van der Waals-type model?. Monthly Notices of the Royal Astronomical Society, v. 523, n. 4, p. 10-pg., 2023-06-22. (22/03575-3, 17/05660-0)