129 citations · 434 across the 32 of their papers we have counts for
32 papers
Nonlinear electrodynamics in magnetars: systematic effects on radius constraints and timing analysis
Gabriel A. Porto, Jonas P. Pereira, Eduardo Bittencourt +1
Magnetars are among the most extreme laboratories in the universe, harboring surface magnetic fields reaching ~G. At these supercritical scales, Maxwell's linear electrody…
Dynamical tides in neutron stars with first-order phase transitions: the role of the discontinuity mode
Jonas P. Pereira, Lucas Tonetto, Michał Bejger +2
During the late stages of a binary neutron star inspiral, dynamical tides induced in each star by its companion become significant and should be included in complete gravitational-…
Feasibility of singularity avoidance for a collapsing object due to a scalar field
Eduardo Bittencourt, Alan G. Cesar, Jonas P. Pereira
We study the problem of the gravitational collapse of an object as seen by an external observer. We assume that the resultant spacetime is a match of an external Vaidya spacetime w…
Binary coalescences as sources of Ultra-High Energy Cosmic Rays
Jonas P. Pereira, Carlos H. Coimbra-Araújo, Rita C. dos Anjos +1
Binary coalescences are known sources of gravitational waves (GWs) and they encompass combinations of black holes (BHs) and neutron stars (NSs). Here we show that when BHs are embe…
Matching slowly rotating spacetimes split by dynamic thin shells
Jonas P. Pereira, Jorge A. Rueda
We investigate within the Darmois-Israel thin shell formalism the match of neutral and asymptotically flat, slowly rotating spacetimes (up to the second order in the rotation param…
Crustal failure as a tool to probe hybrid stars
Jonas P. Pereira, Michał Bejger, Paweł Haensel +1
It is currently unknown if neutron stars (NSs) are composed of nucleons only or are hybrid stars, i.e., in addition to nucleonic crusts and outer cores, they also possess quark cor…
Evidence for 3XMM J185246.6+003317 as a massive magnetar with a low magnetic field
Rafael C. R. de Lima, Jonas P. Pereira, Jaziel G. Coelho +10
3XMM J185246.6+003317 is a transient magnetar located in the vicinity of the supernova remnant Kes\,79. So far, observations have only set upper limits to its surface magnetic fiel…
Differentiating between sharp and smoother phase transitions in neutron stars
Jonas P. Pereira, Michał Bejger, J. Leszek Zdunik +1
The internal composition of neutron stars is still an open issue in astrophysics. Their innermost regions are impervious to light propagation and gravitational waves mostly carry g…
High-energy gamma-ray emission from SNR G57.2+0.8 hosting SGR J1935+2154
Rita C. dos Anjos, Jaziel G. Coelho, Jonas P. Pereira +1
In recent years some efforts have been made to identify active sources capable of accelerating particles up to eV, known as PeVatrons. Measurements of TeV ( eV)…
Probing elastic quark phases in hybrid stars with radius measurements
Jonas P. Pereira, Michał Bejger, Lucas Tonetto +4
The internal composition of neutron stars is currently largely unknown. Due to the possibility of phase transitions in quantum chromodynamics, stars could be hybrid and have quark…
Tidal deformations of hybrid stars with sharp phase transitions and elastic crusts
Jonas P. Pereira, Michał Bejger, Nils Andersson +1
Gravitational wave astronomy is expected to provide independent constraints on neutron star properties, such as their dense matter equation of state. This is possible with the meas…
Neutrino physics in slowly rotating black hole spacetime and nonlinear electrodynamics
H. Mosquera Cuesta, G. Lambiase, J. P. Pereira
Huge electromagnetic fields are known to be present during the late stages of the dynamics of supernovae. Thus, when dealing with electrodynamics in this context, the possibility m…
Tidal deformations of neutron stars with elastic crusts
Fabian Gittins, Nils Andersson, Jonas P. Pereira
With the first detections of binary neutron star mergers by gravitational-wave detectors, it proves timely to consider how the internal structure of neutron stars affects the way i…
Evidence for a multipolar magnetic field in SGR J1745-2900 from X-ray light-curve analysis
Rafael C. R. de Lima, Jaziel G. Coelho, Jonas P. Pereira +2
SGR J1745-2900 was detected from its outburst activity in April 2013 and it was the first soft gamma repeater (SGR) detected near the center of the Galaxy (Sagittarius A). We u…
Born-Infeld magnetars: larger production of gravitational waves due to larger toroidal magnetic fields
Jonas P. Pereira, Jaziel G. Coelho, Rafael C. R. de Lima
We discuss some aspects of Pereira et al. (2018) concerning magnetars described by nonlinear theories of the electromagnetism and make the case for the Born-Infeld Lagrangian. We f…
A local Lagrangian for MOND as modified inertia
Renato Costa, Guilherme Franzmann, Jonas P. Pereira
We propose a local Lagrangian for a point particle where its inertia part is modified in the regime of small accelerations. For the standard gravitational central force, it recover…
Trirefringence in nonlinear magnetoeletric metamaterials revisited
V. A. De Lorenci, A. L. Ferreira Junior, J. P. Pereira
Trirefringence is related to the existence of three distinct phase velocity solutions (and polarizations) for light propagation in a same wave-vector direction. This implies that w…
General relativistic surface degrees of freedom in perturbed hybrid stars
Jonas P. Pereira, Germán Lugones
We study how the nature of a hybrid system (perfect fluid, solid or a mixture of them) could be related to the induction of general relativistic surface degrees of freedom on phase…
Born-Infeld magnetars: larger than classical toroidal magnetic fields and implications for gravitational-wave astronomy
Jonas P. Pereira, Jaziel G. Coelho, Rafael C. R. de Lima
Magnetars are neutron stars presenting bursts and outbursts of X- and soft-gamma rays that can be understood with the presence of very large magnetic fields. Thus, nonlinear electr…
Phase transition effects on the dynamical stability of hybrid neutron stars
Jonas P. Pereira, César V. Flores, Germán Lugones
We study radial oscillations of hybrid non-rotating neutron stars composed by a quark matter core and hadronic external layers. At first, we physically deduce the junction conditio…
Probing nonlinear electrodynamics in slowly rotating spacetimes through neutrino astrophysics
Herman J. Mosquera Cuesta, Gaetano Lambiase, Jonas P. Pereira
Huge electromagnetic fields are known to be present during the late stages of the dynamics of supernovae. Thus, when dealing with electrodynamics in this context, the possibility m…
Magnetic liquids under high electric fields as optical diodes
Jonas P. Pereira, Igor I. Smolyaninov, Vera N. Smolyaninova
We show and give examples of how unidirectional propagation of light rays in the limit of geometric optics could arise in some magnetic fluids due to the magnetoelectric effect und…
Satellite Test of the Equivalence Principle as a Probe of Modified Newtonian Dynamics
Jonas P. Pereira, James M. Overduin, Alexander J. Poyneer
The proposed Satellite Test of the Equivalence Principle (STEP) will detect possible violations of the Weak Equivalence Principle by measuring relative accelerations between test m…
The influence of quantum vacuum friction on pulsars
Jaziel G. Coelho, Jonas P. Pereira, José C. N. de Araujo
We firstly revisit the energy loss mechanism known as quantum vacuum friction (QVF), clarifying some of its subtleties. Then we investigate the observables that could easily differ…