A5090190425- Pulsars and Gravitational Waves Research
- High-pressure geophysics and materials
- Astrophysical Phenomena and Observations
- Magnetic confinement fusion research
- Gamma-ray bursts and supernovae
- Ionosphere and magnetosphere dynamics
- Galaxies: Formation, Evolution, Phenomena
Université Grenoble Alpes
2022
Istanbul Technical University
2015-2022
Centre National de la Recherche Scientifique
2022
The recent detection of pulsations from the ultra luminous X-ray source (ULX) NuSTAR J095551+6940.8 in M82 by Bachetti et al. indicates that object is an accreting neutron star a high mass binary (HMXB) system. super-Eddington luminosity implies magnetic field sufficiently strong to suppress scattering cross-section unless its beam viewed at favourable angle. We show torque equilibrium condition for pulsar dipole $6.7 \times 10^{13}$ G, two orders magnitude higher than estimated al., and...
ABSTRACT The recently discovered rotationally powered pulsar PSR J1640–4631 is the first to have a braking index measured, with high enough precision, that greater than 3. An inclined magnetic rotator in vacuum or plasma would be subject not only spin-down but also an alignment torque. model can address for almost orthogonal rotator, which incompatible single-peaked pulse profile. dipole corotating predicts indices between 3 and 3.25. We find of 3.15 consistent two different inclination...
The afterglow emission of some gamma-ray bursts (GRBs) show a shallow decay (plateau) phase implying continuous injection energy. source this energy is very commonly attributed to the spin-down power nascent millisecond magnetar. magnetic dipole radiation torque considered be mechanism causing neutron star. This has component working for alignment angle between rotation and axis, i.e., inclination angle, which been neglected in modelling GRB light curves. Here, we demonstrate evolution...
Context. Pulsars show irregularities in their pulsed radio emission that originate from propagation effects and the intrinsic activity of source. Aims. In this work, we investigate role played by magnetic reconnection formation plasmoids pulsar wind current sheet as a possible source pulse-to-pulse variability incoherent, high-energy pattern. Methods. We used two-dimensional particle-in-cell simulation an orthogonal magnetosphere restricted to plane perpendicular star spin axis. evolved...