72 citations · 653 across the 35 of their papers we have counts for
27 papers · 1 filter
Structure and astrophysical properties of dark energy admixed neutron stars
Juan M. Z. Pretel, Sergio B. Duarte, Mariana Dutra +1
The presence of a dark energy (DE) core, made of a Chaplygin dark fluid, is capable of influencing the diverse observable properties of neutron stars (NSs). However, there is also…
Bayesian constraints on quadratic gravity from the ADM mass of white dwarfs
Edson Otoniel, Lucas A. Souza, Jonathan A. Rebouças +1
We calculate static equilibrium sequences for white dwarfs (WDs) in quadratic symmetric teleparallel gravity, f(Q)=Q+alpha Q^2, and perform a Bayesian comparison between the negati…
Dark energy stars from the modified Chaplygin gas: universal relations
Krishna Pada Das, Juan M. Z. Pretel
Dark energy stars (DESs), described by the modified Chaplygin gas (MCG), can be dynamically stable and fall within different observational measurements. In this work, we employ div…
Examining the influence of anisotropy on the fundamental mode of nonradial oscillation in neutron stars on a complete general relativistic scheme
José D. V. Arbañil, Gabriel O. Cavalheiro, Victor B. T. Alves +3
The anisotropic influence on the -mode frequency of oscillations and dimensionless tidal deformability of neutron stars is analyzed by employing the nonradial oscillation equati…
White dwarf structure in gravity: beyond the Chandrasekhar mass limit
Edson Otoniel, Juan M. Z. Pretel, Clésio E. Mota +3
In this work, we investigate the relativistic structure of white dwarfs (WDs) within the framework of modified gravity theory , which introduces a non-mi…
White dwarfs in regularized 4D Einstein-Gauss-Bonnet gravity
Juan M. Z. Pretel, Takol Tangphati, İzzet Sakallı +1
White dwarfs (WDs), as the remnants of low to intermediate-mass stars, provide a unique opportunity to explore the interplay between quantum mechanical degeneracy pressure and grav…
Neutron stars with a dark-energy core from the Chaplygin gas
Juan M. Z. Pretel, Mariana Dutra, Sergio B. Duarte
We analyze the effect of a Chaplygin dark fluid (CDF) core on neutron stars (NSs). To address this study, we focus on the relativistic structure of stellar configurations composed…
Dark energy effects on realistic neutron stars
Juan M. Z. Pretel, Sergio B. Duarte, José D. V. Arbañil +2
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 Chaplyg…
Moment of inertia and compactness of quark stars within the context of gravity
Juan M. Z. Pretel
Within the metric formalism of gravity theories, we investigate the hydrostatic equilibrium structure of compact stars taking into account both isotropic and anisotrop…
Compact stars in Rastall gravity: hydrostatic equilibrium and radial pulsations
Juan M. Z. Pretel, Clésio E. Mota
Within the context of Rastall gravity, we investigate the hydrostatic equilibrium and dynamical stability against radial pulsations of compact stars, where a free parameter mea…
Neutron stars in gravity
Clésio E. Mota, Juan M. Z. Pretel, César O. V. Flores
This study explores the behavior of compact stars within the framework of gravity, focusing on the functional form . The modified Tolman-Oppenh…
Effects of anisotropic pressure on interacting quark star structure
Juan M. Z. Pretel, Takol Tangphati, Ayan Banerjee +1
Perturbative Quantum Chromodynamics (pQCD) corrections and color superconductivity predict that strongly interacting matter can reveal new physical phenomena under extreme conditio…
Relativistic structure of charged quark stars in energy-momentum squared gravity
Juan M. Z. Pretel, Takol Tangphati, Ayan Banerjee
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 describ…
Compact stars in scalar-tensor theories with a single-well potential and the corresponding theory
Juan M. Z. Pretel, Sergio E. Jorás, Ribamar R. R. Reis +2
The macroscopic properties of compact stars in modified gravity theories can be significantly different from the general relativistic (GR) predictions. Within the gravitational con…
Radial pulsations, moment of inertia and tidal deformability of dark energy stars
Juan M. Z. Pretel
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…
Moment of inertia of slowly rotating anisotropic neutron stars in gravity
Juan M. Z. Pretel
Within the framework of theories of gravity, we investigate the hydrostatic equilibrium of anisotropic neutron stars with a physically relevant equation of state (EoS) for…
Charged quark stars in gravity
Juan M. Z. Pretel, Takol Tangphati, Ayan Banerjee +1
Recent advances in nuclear theory combined with new astrophysical observations have led to the need for specific theoretical models that actually apply to phenomena on dense-matter…
Charged quark stars in metric gravity
Juan M. Z. Pretel, José D. V. Arbañil, Sergio B. Duarte +2
We provide the modified TOV equations for the hydrostatic equilibrium of charged compact stars within the metric gravitational background. We adopt the MIT bag model EoS for…
Anisotropic quark stars in gravity
Juan M. Z. Pretel, Sergio B. Duarte
Within the metric formalism of theories of gravity, where is the Ricci scalar, we study the hydrostatic equilibrium structure of compact stars with the inclusion of anis…
-gravity quark stars from perturbative QCD
José C. Jiménez, Juan M. Z. Pretel, Eduardo S. Fraga +2
We investigate the structure of quark stars in the framework of gravity using an equation of state for cold quark matter obtained from perturbative QCD, parametrize…
Electrically Charged Quark Stars in Einstein-Gauss-Bonnet Gravity
Juan M. Z. Pretel, Ayan Banerjee, Anirudh Pradhan
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 spacetim…
Five-dimensional compact stars in Einstein-Gauss-Bonnet gravity
Juan M. Z. Pretel, Ayan Banerjee, Anirudh Pradhan
Within the framework of Einstein-Gauss-Bonnet theory in five-dimensional spacetime ( EGB), we derive the hydrostatic equilibrium equations and solve them numerically to obtain…
Neutron stars in gravity with conserved energy-momentum tensor: Hydrostatic equilibrium and asteroseismology
Juan M. Z. Pretel, Sergio E. Jorás, Ribamar R. R. Reis +1
We investigate the equilibrium and radial stability of spherically symmetric relativistic stars, considering a polytropic equation of state (EoS), within the framework of …
Equilibrium, radial stability and non-adiabatic gravitational collapse of anisotropic neutron stars
Juan M. Z. Pretel
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 aniso…