Strange stars in energy-momentum-conserved f (R, T) gravity

Autor(es)

Carvalho, G. A. ^{[1, 2]} ; Dos Santos, S. I. ^{[1, 3]} ; Moraes, Jr., P. H. R. S. ^{[1, 4]} ; Malheiro, M. ^[1]

Afiliação do(s) autor(es)

^[1] Inst Tecnol Aeronaut, Dept Fis, BR-12228900 Sao Jose Dos Campos, SP - Brazil

^[2] Univ Vale Paraiba, Inst Pesquisa & Desenvolvimento IP&D, BR-12244000 Sao Jose Dos Campos, SP - Brazil

^[3] Inst Fed Catarinense, Dept Ensino Pesquisa & Extensao, BR-89283064 Sao Bento Do Sul, SC - Brazil

^[4] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, Cidade Univ, BR-05508090 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF MODERN PHYSICS D; v. 29, n. 10 JUL 2020.
• Citações Web of Science: 0

Resumo

For the accurate understanding of compact astrophysical objects, the Tolmann-Oppenheimer-Volkoff (TOV) equation has proved to be of great use. Nowadays, it has been derived in many alternative gravity theories, yielding the prediction of different macroscopic features for such compact objects. In this work, we apply the TOV equation of the energy-momentum-conserved version of the f (R, T) gravity theory to strange quark stars. The f (R, T) theory, with f (R, T) being a generic function of the Ricci scalar R and trace of the energy-momentum tensor T to replace R in the Einstein-Hilbert gravitational action, has shown to provide a very interesting alternative to the cosmological constant Lambda in a cosmological scenario, particularly in the energy-momentum conserved case (a general f (R, T) function does not conserve the energy momentum tensor). Here, we impose the condition del T-mu(mu v) = 0 to the astrophysical case, particularly the hydrostatic equilibrium of strange stars. We solve the TOV equation by taking into account linear equations of state to describe matter inside strange stars, such as p = omega rho and p = omega(rho - 4B), known as the MIT bag model, with p the pressure and rho the energy density of the star, omega constant and B the bag constant. (AU)

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