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of 68
pro vyhledávání: '"Pretel, Juan M. Z."'
By considering realistic equations of state (EoSs) to describe the ordinary matter of the stellar crust, in this study, we explore the effect of a dark energy core, made of Chaplygin Dark Fluid (CDF), on neutron stars (NSs). To accomplish this purpos
Externí odkaz:
http://arxiv.org/abs/2411.08793
Autor:
Pretel, Juan M. Z.
Publikováno v:
Phys. Scr. 99 (2024) 085001
Within the metric formalism of $f(R,T,L_m)$ gravity theories, we investigate the hydrostatic equilibrium structure of compact stars taking into account both isotropic and anisotropic pressure. For this purpose, we focus on the $f(R,T,L_m)= R+ \alpha
Externí odkaz:
http://arxiv.org/abs/2407.03626
Publikováno v:
Eur. Phys. J. C 84 (2024) 1038
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 fluid is
Externí odkaz:
http://arxiv.org/abs/2404.06412
Autor:
Pretel, Juan M. Z., Mota, Clésio E.
Publikováno v:
Gen. Relativ. Gravit. 56 (2024) 43
Within the context of Rastall gravity, we investigate the hydrostatic equilibrium and dynamical stability against radial pulsations of compact stars, where a free parameter $\beta$ measures the deviations from General Relativity (GR). We derive both
Externí odkaz:
http://arxiv.org/abs/2403.02440
Publikováno v:
Eur. Phys. J. C 84 (2024) 673
This study explores the behavior of compact stars within the framework of $f(R,L_m,T)$ gravity, focusing on the functional form $f(R,L_m,T) = R + \alpha TL_m$. The modified Tolman-Oppenheimer-Volkoff (TOV) equations are derived and numerically solved
Externí odkaz:
http://arxiv.org/abs/2402.13360
Autor:
Pretel, Juan M. Z., Zhang, Chen
Publikováno v:
JCAP 10 (2024) 032
Interacting quark stars, which are entirely composed of interacting quark matter including perturbative QCD corrections and color superconductivity, can meet constraints from various pulsar observations. In realistic scenarios, pressure anisotropies
Externí odkaz:
http://arxiv.org/abs/2401.12519
Publikováno v:
Phys. Rev. D 109 (2024) 023524
As a potential candidate for the late-time accelerating expansion of the Universe, the Chaplygin gas and its generalized models have significant implications to modern cosmology. In this work we investigate the effects of dark energy on the internal
Externí odkaz:
http://arxiv.org/abs/2401.01961
Publikováno v:
Phys. Lett. B 848 (2024) 138375
Perturbative Quantum Chromodynamics (pQCD) corrections and color superconductivity predict that strongly interacting matter can reveal new physical phenomena under extreme conditions. Taking into account these interaction effects, we investigate the
Externí odkaz:
http://arxiv.org/abs/2311.18770
Publikováno v:
Ann. Phys. 458 (2023) 169440
Within the context of energy-momentum squared gravity (EMSG), where non-linear matter contributions appear in the gravitational action, we derive the modified TOV equations describing the hydrostatic equilibrium of charged compact stars. We adopt two
Externí odkaz:
http://arxiv.org/abs/2308.05197
Autor:
Pretel, Juan M. Z., Jorás, Sergio E., Reis, Ribamar R. R., Duarte, Sergio B., Arbañil, José D. V.
Publikováno v:
Phys. Dark Universe 43 (2024) 101394
The macroscopic properties of compact stars in modified gravity theories can be significantly different from the general relativistic (GR) predictions. Within the gravitational context of scalar-tensor theories, with a scalar field $\phi$ and couplin
Externí odkaz:
http://arxiv.org/abs/2308.00203