107 citations · 653 across the 25 of their papers we have counts for
25 papers
Effects of the symmetry energy slope on magnetized neutron stars
Luiz L. Lopes, Cesar V. Flores, Débora P. Menezes
In this work, we study the effect of the symmetry slope on the observables of weakly and strongly magnetized neutron stars within the chaotic magnetic field approximation. We inves…
Role of the symmetry energy slope in neutron stars: exploring the model-dependency
Luiz L. Lopes
Using six different parametrizations of the quantum hadrodynamics (one of which is original), I study how different values of the symmetry energy slope ( affect some microscopi…
Decoding rotating neutron stars: Role of the symmetry energy slope
Luiz L. Lopes
In December 2023, the Fermi LAT Catalog announced the discovery of 33 new millisecond pulsars. Motivated by that, in this work, I study how different values of the symmetry energy…
Correlation between the symmetry energy slope and the deconfinement phase transition
Luiz L. Lopes, Debora P. Menezes, Mateus R. Pelicer
We study how the nuclear symmetry energy slope () can affect the hadron-quark phase transition and neutron star properties. We show that the main physical quantities as the crit…
A Bayesian study of quark models in view of recent astrophysical constraints
Franciele M. da Silva, Adamu Issifu, Luiz L. Lopes +2
In this work, we perform a comparative analysis between the density-dependent quark model and the vector MIT bag model using Bayesian analysis. We use the equations of state genera…
Anisotropic Strange Stars in the Spotlight: Unveiling Constraints through Observational Data
H. C. Das, Luiz L. Lopes
Motivated by the recent suggestions that very massive pulsar (PSR J0952-0607) and very light compact object (HESS J1731-347) exist, in this article, we revisit the possibility of s…
A closer look at the Yukawa's interaction from a symmetry group perspective
Luiz L. Lopes
I investigate the use of the SU(3) Clebsch-Gordan coefficients in light of the relations of completeness and closure. I show that in the case of 1, there is an…
Imprints of the nuclear symmetry energy slope in gravitational wave signals emanating from neutron stars
Luiz L. Lopes, Victor B. T. Alves, César O. V. Flores +1
We investigate possible traces of the nuclear symmetry energy slope () in the gravitational wave emission of neutron stars. For fixed stellar mass values, we examine how the slo…
QCD Phase Diagrams via QHD and MIT-Based Models
Carline Biesdorf, Debora P. Menezes, Luiz L. Lopes
In this paper the QCD phase diagram is obtained by the crossing of two effective models: the MIT bag based models are used to describe quark matter and QHD type models to describe…
Strange Stars within Bosonic and Fermionic Admixed Dark Matter
Luiz L. Lopes, H. C. Das
In this work, we study dark matter (DM) admixed strange quark stars exploring the different possibilities about the nature of the DM and their effects on the macroscopic properties…
The baryon coupling scheme in an unified SU(3) and SU(6) symmetry formalism
Luiz L. Lopes, Kauan D. Marquez, Débora P. Menezes
We calculate the baryon-meson coupling constants for the spin-1/2 baryonic octet and spin-3/2 decuplet in a unified approach relying on symmetry arguments such as the fact that the…
Hypermassive quark cores
Luiz L. Lopes, Carline Biesdorf, Débora P. Menezes
Using a quantum hadrodynamics (QHD) and MIT based models we construct hybrid stars within the Maxwell criteria of hadron-quark phase transition. We are able to produce a hybrid sta…
On the nature of the mass-gap object in the GW190814 event
Luiz L. Lopes, Debora P. Menezes
In this work, we make a very extensive study on the conditions that allow the mass-gap object in the GW190814 event to be faced as a degenerate star instead of a black hole. We beg…
Hyperonic neutron stars: reconciliation between nuclear properties and NICER and LIGO/VIRGO results
Luiz L. Lopes
Using a extended version of the Quantum Hadrodynamics (QHD), I propose a new microscopic equation of state (EoS) able to correctly reproduce the main properties of symmetric nuclea…
The neutron star inner crust: an empirical essay
Luiz L. Lopes
In this work we study how the small contribution of the inner crust to the total equation of state (EoS) of a neutron star affects its mass-radius relation, focusing on the canonic…
Modified MIT Bag Models -- part II: QCD phase diagram and hot quark stars
Luiz L. Lopes, Carline Biesdorf, K. D. Marquez +1
In the present work we use the modified versions of the MIT bag model, on which both a vector field and a self-interacting term are introduced, to obtain hot quark matter and to in…
Modified MIT bag Models -- part I: Thermodynamic consistency, stability windows and symmetry group
Luiz L. Lopes, Carline Biesdorf, Débora P. Menezes
In this work we study different variations of the MIT bag model. We start with the so called non-ideal bag model and discuss it in detail. Then we implement a vector interaction in…
Broken SU(6) symmetry and massive hybrid stars
Luiz L. Lopes, Debora P. Menezes
In this work we revisit the quantum hadrodynamics (QHD) formalism to investigate hyperonic and hybrid stars with hyperon-meson couplings fixed via broken SU(6) group, in favor of a…
Role of vector channel in different classes of (non) magnetized neutron stars
Luiz L. Lopes, Debora P. Menezes
We study how the magnetic field and non-standard vector channels affect hadronic, quarkionic and hybrid stars. In the hadronic phase, we use the QHD model, within its standard $σωρ…
Gravitational Wave Signatures of Highly Magnetized Neutron Stars
Cesar V. Flores, Luiz L. Lopes, Luis B. Castro +1
Motivated by the recent gravitational wave detection by the LIGO-VIRGO observatories, we study the Love number and dimensionless tidal polarizability of highly magnetized stars. We…
Hyperon threshold and stellar radii
Luiz L. Lopes, Debora P. Menezes
We study how the hyperon threshold influences the radius of the canonical neutron star in the light of the measurements found in the recent literature. We show t…
On Magnetized Neutron Stars
Luiz L. Lopes, Debora P. Menezes
In this work we review the formalism normally used in the literature about the effects of density-dependent magnetic fields on the properties of neutron and quark stars, expose som…
Effects of the Symmetry Energy and its Slope on Neutron Star Properties
L. L. Lopes, D. P. Menezes
In this work we study the influence of the symmetry energy and its slope on three major properties of neutron stars: the maximum mass, the radii of the canonical 1.4 and t…
Hypernuclear matter in a complete SU(3) symmetry group
Luiz L. Lopes, Debora P. Menezes
Using the well known quantum hadrodynamics (QHD), we study the effects of meson-hyperon coupling constants on the onset of hyperons in dense nuclear matter. We use the SU(3) symmet…