Exact solutions for compact stars with CFL quark matter

Autor(es)

Rocha, L. S. ^[1] ; Bernardo, A. ^[1] ; De Avellar, M. G. B. ^{[2, 3]} ; Horvath, J. E. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Amosfer, BR-05508090 Sao Paulo, SP - Brazil

^[2] Inst Tecnol Aerondut, Praca Marechal Eduardo Gomes, 50 Vila Acacias, BR-12228900 Sao Jose Dos Campos, SP - Brazil

^[3] Univ Fed Sao Paulo, Unidade Jose Alencar, Rua Sao Nicolau 210 Ctr, BR-09913030 Diadema, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF MODERN PHYSICS D; v. 29, n. 7 MAY 2020.
• Citações Web of Science: 0

Resumo

The search for the true ground state of the dense matter remains open since Bodmer, Terazawa and others raised the possibility of stable quark matter, boosted by Witten's strange matter hypothesis in 1984. Within this proposal, the strange matter is assumed to be composed of strange quarks in addition to the usual ups and downs, having an energy per baryon lower than the strangeless counterpart, and even lower than that of nuclear matter. In this sense, neutron stars should actually be strange stars. Later work showed that a paired, symmetric in flavor, color-flavor locked (CFL) state would be preferred to the one without any pairing for a wide range of the parameters (gap Delta, strange quark mass m(s) and bag constant B). We use an approximate, yet very accurate, CFL equation-of-state (EoS) that generalizes the MIT bag model to obtain two families of exact solutions for the static Einstein Field Equations (EFE) constructing families of anisotropic compact relativistic objects. In this fashion, we provide exact useful solutions directly connected with microphysics. (AU)

• Processo FAPESP: 13/26258-4 - Matéria superdensa no universo
• Beneficiário: Manuel Máximo Bastos Malheiro de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático