64 citations · 349 across the 24 of their papers we have counts for
19 papers · 1 filter
The source of the 2017 cosmic ray half-year modulation event
O. P. M. Aslam, D. MacTaggart, R. Battiston +2
In 2017, as the solar cycle approached solar minimum, an unusually long and large depression was observed in galactic cosmic ray (GCR) protons, detected with the Alpha Magnetic Spe…
Differential rotation in convecting spherical shells with non-uniform viscosity and entropy diffusivity
Parag Gupta, David MacTaggart, Radostin D. Simitev
Contemporary three-dimensional physics-based simulations of the solar convection zone disagree with observations. They feature differential rotation substantially different from th…
Deciphering Pre-solar-storm Features Of September-2017 Storm From Global And Local Dynamics
Breno Raphaldini, Mausumi Dikpati, Aimee A. Norton +4
We investigate whether global toroid patterns and the local magnetic field topology of solar active region AR12673 together can hindcast occurrence of the biggest X-flare of solar…
A study of global magnetic helicity in self-consistent spherical dynamos
Parag Gupta, Radostin D. Simitev, David MacTaggart
Magnetic helicity is a fundamental constraint in both ideal and resistive magnetohydrodynamics. Measurements of magnetic helicity density on the Sun and other stars are used to int…
Kelvin-Helmholtz instability and collapse of a twisted magnetic null point with anisotropic viscosity
James Quinn, David MacTaggart, Radostin Simitev
Context: Magnetic null points are associated with high-energy coronal phenomena such as solar flares and are often sites of reconnection and particle acceleration. Dynamic twisting…
The Effect of Anisotropic Viscosity on the Nonlinear Kink Instability
James Quinn, David MacTaggart, Radostin Simitev
The kink instability of magnetohydrodynamics is believed to be fundamental to many aspects of the dynamic activity of the solar atmosphere, such as the initiation of flares and the…