The attribute of rotational profile to the hyperon puzzle in the prediction of heaviest compact star

Autor(es)

Bhuyan, M. ^{[1, 2]} ; Carlson, B. V. ^[1] ; Patra, S. K. ^[3] ; Zhou, Shan-Gui ^{[4, 2, 5]}

Afiliação do(s) autor(es)

^[1] Inst Tecnol Aeronaut, BR-12228900 Sao Paulo - Brazil

^[2] Chinese Acad Sci, Inst Theoret Phys, Key Lab Theoret Phys, Beijing 100190 - Peoples R China

^[3] Sainik Sch, Inst Phys, Sachivalaya Marg, Bhubaneswar 751005, Orissa - India

^[4] Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan - Peoples R China

^[5] Natl Lab Heavy, Ctr Theoret Nucl Phys, Lanzhou 730000, Gansu - Peoples R China

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS; v. 26, n. 9 SEP 2017.
• Citações Web of Science: 1

Resumo

In this theoretical study, we report an investigation of the equations of state (EoSs) of hyper-nuclear matter and its composition as a function of density within the framework of effective field theory motivated relativistic mean field model. We have used G2 force parameter along with various hyperon-meson coupling ratios by allowing the mixing and the breaking of SU(6) symmetry to predict the EoSs, keeping the nucleonic coupling constant intact. We have estimated the properties of nonrotating and rapidly rotating configuration of compact stars by employing four different representative sets of equations of state. The obtained results of the mass and radius for the compact stars are compared with the recent mass observations. Further, we have studied the stability and sensitivity of rotational frequency (at sub-millisecond period) on the configuration of the compact stars because the angular frequency is significantly smaller than the mass-shedding (Keplerian) frequency in slow rotation regime. Moreover, the yield of hyperon as a function of density for various hyperon-meson couplings are also estimated. (AU)

• Processo FAPESP: 14/26195-5 - Correlações isoescalares de dois nucleon em núcleos finitos
• Beneficiário: Mrutunjaya Bhuyan
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado