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GRMHD Simulations of Accreting Proto-Magnetars II. Implications for r-process Nucleosynthesis
Tejas Prasanna, Kyle Parfrey, Brian D. Metzger +3
Newly formed, rapidly spinning, strongly magnetized neutron stars ("millisecond proto-magnetars") can arise in collapsars, neutron star mergers, or white-dwarf accretion-induced co…
GRMHD Simulations of Accreting Proto-Magnetars I. Implications for Gamma-Ray Burst Jets and Energetic Explosions
Tejas Prasanna, Kyle Parfrey, Brian D. Metzger +3
Newly formed, rapidly rotating, strongly magnetized neutron stars ("millisecond proto-magnetars") are promising central engines for gamma-ray bursts (GRBs) and luminous supernovae.…
Damping of Fast Radio Bursts in the Inner Magnetospheres of Magnetars
Siddhant Solanki, Jens Mahlmann, Alexander Philippov +1
We investigate the propagation of fast radio bursts (FRBs) through magnetar magnetospheres. Previous work showed that, in the inner magnetosphere, GHz radio waves propagate as fast…
Radio precursors of monster shocks: a mechanism for fast radio bursts from SGR 1935+2154
Andrei M. Beloborodov
Kilohertz perturbations in active magnetars evolve into monster radiative shocks at radii cm. The shock generates X-rays and a semi-coherent radio precursor, which str…
Delayed Radio Flares in Tidal Disruption Events from Star-Disk Collision Outflows
Itai Linial, Brian D. Metzger, Andrei M. Beloborodov
A growing fraction of tidal disruption events (TDEs) exhibit radio emission that rises only years after the optical or infrared flare, indicating delayed outflow activity. In some…
Global Magnetohydrodynamic Simulations of Monster Shocks in Neutron Star Magnetospheres
Michael P. Grehan, Bart Ripperda, Andrei M. Beloborodov +2
Waves launched from the neutron star surface or inner magnetosphere propagate through the magnetosphere as small perturbations, but can grow relative to the background magnetic fie…
Relativistic Magnetohydrodynamic Simulations of Giant Magnetar Bursts
Koushik Chatterjee, Alexander Philippov, Andrei M. Beloborodov +3
Gradual crustal deformation can generate strongly twisted magnetic fields around magnetars, potentially triggering giant flares with total energies exceeding $10^{44}\,\mathrm{erg}…