106 citations · 380 across the 13 of their papers we have counts for
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Revisiting the Rheology of Neutron Star Crusts with Molecular Dynamics
Matthew E Caplan, Ashley Bransgrove
Explosive events from magnetars are likely due to the catastrophic release of stress in their crusts, but the behavior of crustal matter beyond linear elasticity is poorly understo…
Linear Mode Conversion in Ultramagnetized Pair Plasmas: Single-Parameter Scaling
Dawei Dai, Ashley Bransgrove, Anirudh Prabhu +1
In neutron star (NS) magnetospheres, plasma waves propagate as normal modes with distinct propagation dynamics that strongly influence observable signals. This letter presents a un…
Magnetic reconnection with a 0.1 rate: Effective resistivity in general relativistic magnetohydrodynamics
B. Ripperda, M. P. Grehan, A. Moran +5
Relativistic magnetic reconnection is thought to power various multi-wavelength emission signatures from neutron stars and black holes. Relativistic resistive magnetohydrodynamics…
Crustal Quakes Spark Magnetospheric Blasts: Imprints of Realistic Magnetar Crust Oscillations on the Fast Radio Burst Signal
Louis Burnaz, Elias R. Most, Ashley Bransgrove
Many transients believed to originate from magnetars are thought to be triggered by crustal activity, which feeds back on the surrounding magnetosphere. These perturbations, throug…
Hyperactive Magnetar Eruptions: Giant Flares, Baryon Ejections, and Fast Radio Bursts
Ashley Bransgrove, Andrei M. Beloborodov, Yuri Levin
Young neutron stars born with magnetic fields G become hyperactive as the field inside the star evolves through ambipolar diffusion on a timescale s.…
Giant Hall Waves Launched by Superconducting Phase Transition in Pulsars
Ashley Bransgrove, Yuri Levin, Andrei M. Beloborodov
The cores of pulsars are expected to become superconducting soon after birth. The transition to type-II superconductivity is associated with the bunching of magnetic field lines in…
Radio Emission and Electric Gaps in Pulsar Magnetospheres
Ashley Bransgrove, Andrei M. Beloborodov, Yuri Levin
The origin of pulsar radio emission is one of the old puzzles in theoretical astrophysics. In this Letter we present a global kinetic plasma simulation which shows from first-princ…
Magnetic Hair and Reconnection in Black Hole Magnetospheres
Ashley Bransgrove, Bart Ripperda, Alexander Philippov
The no-hair theorem of general relativity states that isolated black holes are characterized by three parameters: mass, spin, and charge. In this Letter we consider Kerr black hole…
Alfvén wave mode conversion in pulsar magnetospheres
Yajie Yuan, Yuri Levin, Ashley Bransgrove +1
The radio emission anomaly coincident with the 2016 glitch of the Vela pulsar may be caused by a star quake that launches Alfvén waves into the magnetosphere, disturbing the origin…
Precessing flaring magnetar as a source of repeating FRB 180916.J0158+65
Yuri Levin, Andrei M. Beloborodov, Ashley Bransgrove
Recently, CHIME detected periodicity in the bursting rate of the repeating FRB 180916.J0158+65. In a popular class of models, the fast radio bursts (FRBs) are created by giant magn…
A Quake Quenching the Vela Pulsar
Ashley Bransgrove, Andrei M. Beloborodov, Yuri Levin
The remarkable null pulse coincident with the 2016 glitch in Vela rotation indicates a dynamical event involving the crust and the magnetosphere of the neutron star. We propose tha…
Magnetic Field Evolution of Neutron Stars I: Basic formalism, numerical techniques, and first results
Ashley Bransgrove, Yuri Levin, Andrei Beloborodov
In this work we explore the evolution of magnetic fields inside strongly magnetized neutron stars in axisymmetry. We model numerically the coupled field evolution in the core and t…