307 citations · 601 across the 16 of their papers we have counts for
17 papers
The Role of the Core in Setting Massive Neutron-Star Radii
R. V. Lobato, J. E. Horvath, M. Malheiro
Recent observations by the Neutron Star Interior Composition Explorer (NICER) indicate that the massive pulsar PSR J0740+6620 () has a radius comparable to those i…
Double White Dwarf Mergers as Progenitors of Long-Period Transients
Manuel Malheiro, Sarah V. Borges, Jaziel G. Coelho +6
There is an ongoing discussion in the literature on the nature of long-period transients (LPTs), radio-emitting sources with periods ranging from hundreds to tens of thousands of s…
AGN feeding along a one-armed spiral in NGC 4593: A study using ALMA CO(2-1) observations
K. Kianfar, P. Andreani, J. A. Fernández-Ontiveros +9
We investigate active galactic nuclei (AGN) feeding through the molecular gas (CO(2-1) emission) properties of the local Seyfert 1 galaxy NGC 4593, using Atacama Large Millimeter A…
Sudden discharge of young charged magnetars as a new model for FRBs
Marcio G. B. de Avellar, Pedro P. B. Beaklini, Sílvia P. Nunes +2
We propose a new model for Fast Radio Bursts (FRBs) based on a sudden discharge of a charged young magnetar, caused by the short falling timescale of oppositely charged particles o…
Study of the charged super-Chandrasekhar limiting mass white dwarfs in the gravity
F. Rocha, G. A. Carvalho, D. Deb +1
The equilibrium configuration of white dwarfs composed of a charged perfect fluid are investigated in the context of the gravity, for which and …
White dwarfs with a surface electrical charge distribution: Equilibrium and stability
G. A. Carvalho, José D. V. Arbañil, R. M. Marinho +1
The equilibrium configuration and the radial stability of white dwarfs composed of charged perfect fluid are investigated. These cases are analyzed through the results obtained fro…
A conservative energy-momentum tensor in the gravity and its implications for the phenomenology of neutron stars
S. I. dos Santos, G. A. Carvalho, P. H. R. S. Moraes +1
The solutions for the Tolmann-Oppenheimer-Volkoff (TOV) equation bring valuable informations about the macroscopical features of compact astrophysical objects as neutron stars. The…
On the nature of some SGRs and AXPs as rotation-powered neutron stars
Jaziel G. Coelho, D. L. Cáceres, R. C. R. de Lima +3
We investigate the possibility that some SGRs/AXPs could be canonical rotation-powered pulsars using realistic NS structure parameters instead of fiducial values. We show that real…
Stellar equilibrium configurations of compact stars in gravity
P. H. R. S. Moraes, José D. V. Arbañil, M. Malheiro
In this article we study the hydrostatic equilibrium configuration of neutron stars and strange stars, whose fluid pressure is computed from the equations of state and…
Equilibrium and stability of charged strange quark stars
José D. V. Arbañil, M. Malheiro
The hydrostatic equilibrium and the stability against radial perturbation of charged strange quark stars composed of a charged perfect fluid are studied. For this purpose, it is co…
A different nature between the radio AXPs in comparison to the others SGRs/AXPs
J. G. Coelho, M. Malheiro
SGRs/AXPs are considered a subclass of pulsars powered by magnetic energy and not by rotation, as normal radio pulsars. They are understood as strongly magnetized neutron star, wit…
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…
Vector interaction strength in Polyakov-Nambu-Jona-Lasinio models from hadron-quark phase diagrams
O. Lourenço, M. Dutra, T. Frederico +2
We estimate the vector interaction strength of the Polyakov-Nambu-Jona-Lasinio (PNJL) parametrizations, assuming that its transition curves should be as close as possible of the re…
Charge Influence On Mini Black Hole's Cross Section
R. S. Caraça, M. Malheiro
In this work we study the electric charge effect on the cross section production of charged mini black holes (MBH) in accelerators. We analyze the charged MBH solution using the {\…
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…
Determination of the neutron star mass-radii relation using narrow-band gravitational wave detector
C. H. Lenzi, M. Malheiro, R. M. Marinho +2
The direct detection of gravitational waves will provide valuable astrophysical information about many celestial objects. The most promising sources of gravitational waves are neut…