129 citations · 434 across the 32 of their papers we have counts for
4 papers · 1 filter
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…