5 papers
Stellar Forcing of (exo)Planetary Environments
Julián D. Alvarado-Gómez, Erika Palmerio, Manuel Güdel +13
The environments of exoplanets are fundamentally shaped by the magnetic activity of their host stars through radiative, plasma, and particle-driven processes. This article presents…
Turbulent Diffusion of Magnetic Field Lines in the Heliosphere
J. V. A. Joubert, R. D. Strauss, J. Light +2
Due to solar wind turbulence, Parker spirals are stochastic. The dispersion of magnetic field lines is described by a convection-diffusion equation for the field line density distr…
Are the Parker and Focused Transport Equations Equivalent for Galactic Cosmic Ray Modulation?
J. P. van den Berg, N. E. Engelbrecht, R. D. Strauss
The Parker transport equation (TPE) has been the equation of choice for the past 60 years in studies of galactic cosmic ray (GCR) modulation. Conversely, the focused TPE describes…
Modeling the astrosphere of LHS~1140
K. Scherer, K. Herbst, N. E. Engelbrecht +3
The cosmic ray (CR) flux, as well as the hydrogen flux into the atmosphere of an exoplanet, can change the composition of the atmosphere. Here, we present the CR and hydrogen flux…
An Evaluation of Different Numerical Methods to Calculate the Pitch-angle Diffusion Coefficient from Full-orbit Simulations: disentangling a rope of sand
J. P. van den Berg, P. L. Els, N. E. Engelbrecht
The pitch-angle diffusion coefficient quantifies the effect of pitch-angle scattering on charged particles propagating through turbulent magnetic fields and is a key ingredient in…