7 papers
-Mode oscillations and the gravitational response of compact stars with analytic equations of state
Kilar Zhang, Alessandro Parisi, C. Vásquez Flores +2
We use a simple holographic model to study the property of cold and dense neutron stars (NSs) and deconfined QCD matter. With the aim of investigating the global properties of comp…
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…
Reconciling GW170817 and GW190814 with a Nonmonotonic Sound-Speed Equation of State
Marlon M. S. Mendes, Odilon Lourenço da Silva Filho, César H. Lenzi
We show that the GW170817-GW190814 tension can be reconciled within General Relativity by a structured causal EoS basin found with a Constrained Evolutionary TOV Discovery pipeline…
Certified Uncertainty for Surrogate Models of Neutron Star Equations of State via Mondrian Conformal Prediction
Marlon M. S. Mendes, Roberta Duarte Pereira, Mariana Dutra da Rosa Louren +1
We present a multitask surrogate for neutron-star equations of state (EoSs) that delivers \emph{distribution-free}, certified uncertainty via split conformal prediction (CP) and it…
A Bayesian Approach Study of Hybrid Neutron Stars
Fábio Köpp, César H. Lenzi, César V. Flores +1
In this work, we explore how astronomical observations (specifically measurements of masses, radii, and tidal deformabilities) can constrain the presence of quark matter inside neu…
Holographic hybrid stars with slow phase transitions
M. Aleixo, C. H. Lenzi, M. Dutra +2
The - holographic model is used to describe the core of the hybrid star, composed by quark matter, while its crust is modeled from a hadronic relativistic mean field (RMF…