Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Juan M. Z. Pretel"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 10, Pp 1-10 (2024)
Abstract In this work we study, within the framework of Cowling approximation, the effect of the electric charge on the gravitational wave frequency of fluid oscillation modes of strange quark stars. For this purpose, the dense matter of the stellar
Externí odkaz:
https://doaj.org/article/fbbb3292be19424eaed139972a3add9d
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 7, Pp 1-10 (2024)
Abstract This study explores the behavior of compact stars within the framework of $$f(R,L_m,T)$$ f ( R , L m , T ) gravity, focusing on the functional form $$f(R,L_m,T) = R + \alpha TL_m$$ f ( R , L m , T ) = R + α T L m . The modified Tolman–Opp
Externí odkaz:
https://doaj.org/article/c0dde3d1676e4507ad061f679868f604
Autor:
Juan M. Z. Pretel
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 1, Pp 1-16 (2023)
Abstract We construct dark energy stars with Chaplygin-type equation of state (EoS) in the presence of anisotropic pressure within the framework of Einstein gravity. From the classification established by Iyer et al. (Class Quantum Grav 2:219, 1985),
Externí odkaz:
https://doaj.org/article/4d1cef62408547079e575e7fed2fe402
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 2, Pp 1-9 (2022)
Abstract In this work we study the properties of compact spheres made of a charged perfect fluid with a MIT bag model EoS for quark matter. Considering static spherically symmetric spacetime we derive the hydrostatic equilibrium equations in the rece
Externí odkaz:
https://doaj.org/article/14d3a6acf7594be4a003734569aba30e
Autor:
Juan M. Z. Pretel
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 8, Pp 1-16 (2020)
Abstract In this work we construct families of anisotropic neutron stars for an equation of state compatible with the constraints of the gravitational-wave event GW170817 and for four anisotropy ansatze. Such stars are subjected to a radial perturbat
Externí odkaz:
https://doaj.org/article/0c858818b04d4eae9b4e4a61564a3970
Autor:
Juan M Z Pretel, Sérgio B Duarte
Publikováno v:
Classical and Quantum Gravity. 39:155003
Within the metric formalism of f(R) theories of gravity, where R is the Ricci scalar, we study the hydrostatic equilibrium structure of compact stars with the inclusion of anisotropic pressure. In particular, we focus on the f(R) = R 1+ϵ model and w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::845637d3b9bc9a4f6419ce3bf132bf07
https://doi.org/10.1088/1361-6382/ac7a88
https://doi.org/10.1088/1361-6382/ac7a88
Publikováno v:
European Physical Journal
In this work we study the properties of compact spheres made of a charged perfect fluid with a MIT bag model EoS for quark matter. Considering static spherically symmetric spacetime we derive the hydrostatic equilibrium equations in the recently form
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f41a6472aee955c5896e19921b479ec3
Autor:
Juan M. Z. Pretel, M. F. A. da Silva
We discuss the stability and construct dynamical configurations describing the gravitational collapse of unstable neutron stars with realistic equations of state compatible with the recent LIGO-Virgo constraints. Unlike other works that consider the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::156c3a106318a4556331a62de28a35ed
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2021:064
We examine the static structure configurations and radial stability of compact stars within the context of $f(R, T)$ gravity, with $R$ and $T$ standing for the Ricci scalar and trace of the energy-momentum tensor, respectively. Considering the $f(R,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bed0db243b3c78f890324ee925f41a5
https://doi.org/10.1088/1475-7516/2021/04/064
https://doi.org/10.1088/1475-7516/2021/04/064
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2020:048-048
In the metric approach of $f(R)$ theories of gravity, the fourth-order field equations are often recast as effective Einstein equations in the presence of standard matter and a curvature fluid (which gathers all the extra terms), always in the Jordan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32f5eeeebdd055f866eaafe689093ead
https://doi.org/10.1088/1475-7516/2020/11/048
https://doi.org/10.1088/1475-7516/2020/11/048