41 citations · 72 across the 11 of their papers we have counts for
13 papers
Extending the Pulsar radio population through Quantum Vacuum Cherenkov Emission
Tales A. O. Gomes, Sergei V. Bulanov, Jaziel G. Coelho +3
The presence of some radio pulsars within and below the so-called ``death valley'' in the -- diagram challenges the standard pair-cascade models based on curvature radi…
Tidal Properties of White Dwarfs Admixed with Fermionic Dark Matter
G. A. Carvalho, J. D. V. Arbañil, I. A. Lacerda +1
This study investigates the impact of fermionic dark matter (DM) on the structural and tidal properties of white dwarfs (WDs). Using a two-fluid general relativistic framework, we…
Localized magnetic pressure anisotropy in strange dwarfs with crystalline crusts
Mila Leite Garcia Reis, Daniela Eller Uliana, Jaziel G. Coelho +1
We study equilibrium sequences of magnetized strange dwarfs composed of a self bound MIT bag strange matter core, with \(B_{\rm bag}^{1/4}=145\,{\rm MeV}\), and an ordinary crystal…
Ultra-High-Energy Particle Production in Binary Mergers Endowed with Magnetic Fields
Carlos H. Coimbra-Araujo, Rita C. Anjos, Jonas P. Pereira +1
We study the production of ultra-high-energy particles via the Bañados--Silk--West (BSW) mechanism in the pre-merger phase of binary systems detected by LIGO-Virgo-KAGRA. By solvin…
Optical transients from non-explosive double white-dwarf mergers: the case of a central neutron star remnant
M. M. Ridha Fathima, Alexandre M. R. Almeida, Mattia Bulla +3
Discoveries of ultra-massive magnetic white dwarfs (WDs) and peculiar pulsars have been proposed to originate in double white dwarf (DWD) mergers. There are three possible post-mer…
Observational bounds on Dark Matter Admixed Neutron Stars from Gravitational Wave Data
Rafael M. Santos, Rafael C. Nunes, Jaziel G. Coelho +1
Recent gravitational-wave (GW) observations offer a unique opportunity to probe the fundamental nature of compact objects. A growing body of research has focused on exploring the r…
Exploring Temperature Influences on Gravitational Wave Production in Binary White Dwarfs
Sílvia P. Nunes, José D. V. Arbañil, César H. Lenzi +1
This study investigates the conditions under which gravitational waves (GWs) are emitted during the merger of hot white dwarfs (WDs) in a binary system. Traditionally, these system…
X-ray pulsed light curves of highly compact neutron stars as probes of scalar-tensor theories of gravity
Tulio Ottoni, Jaziel G. Coelho, Rafael C. R. de Lima +2
The strong gravitational potential of neutron stars (NSs) makes them ideal astrophysical objects for testing extreme gravity phenomena. We explore the potential of NS X-ray pulsed…
Impact of stratified rotation on the moment of inertia of neutron stars
Jonas P. Pereira, Tulio Ottoni, Jaziel G. Coelho +2
Rigid (Uniform) rotation is usually assumed when investigating the properties of mature neutron stars (NSs). Although it simplifies their description, it is an assumption because w…
Dynamical instability of white dwarfs and breaking of spherical symmetry under the presence of extreme magnetic fields
J. G. Coelho, R. M. Marinho, M. Malheiro +4
Massive, highly magnetized white dwarfs with fields up to G have been observed and theoretically used for the description of a variety of astrophysical phenomena. Ultramagne…
Data Analysis of Gravitational Waves Signals from Millisecond Pulsars
F. G. de Oliveira, R. M. Marinho, J. G. Coelho +1
The present work is devoted to the detection of monochromatic gravitational wave signals emitted by pulsars using ALLEGRO's data detector. We will present the region (in frequency)…
Investigation of the existence of hybrid stars using Nambu-Jona-Lasinio models
J. G. Coelho, C. H. Lenzi, M. Malheiro +2
We investigate the hadron-quark phase transition inside neutron stars and obtain mass-radius relations for hybrid stars. The equation of state for the quark phase using the standar…
Quarks stars in SU(2) Nambu-Jona-Lasinio model with vector coupling
J. G. Coelho, C. H. Lenzi, M. Malheiro +3
In this work we study the Nambu-Jona-Lasinio model in the SU (2) version with repulsive vector coupling and apply it to quark stellar matter. We discuss the influence of the vector…