Astrophysics - Solar and Stellar Astrophysics

Modeling the Transport of Relativistic Solar Protons along a Heliospheric Current Sheet during Historic GLE Events
Charlotte O. G. Waterfall, Silvia Dalla, Timo Laitinen, Adam Hutchinson, Mike Marsh
Cite DOI arXiv
Energetic proton back-precipitation onto the solar atmosphere in relation to long-duration gamma-ray flares
A. Hutchinson, S. Dalla, T. Laitinen, G. A. de Nolfo, A. Bruno, J. M. Ryan, C. O. G. Waterfall
Cite DOI arXiv
3D propagation of relativistic solar protons through interplanetary space
Context. Solar energetic particles (SEPs) with energy in the GeV range can propagate to Earth from their acceleration region near the …
S. Dalla, G. A. de Nolfo, A. Bruno, J. Giacalone, T. Laitinen, S. Thomas, M. Battarbee, M. S. Marsh
Cite DOI arXiv
From Sun to Interplanetary Space: What is the Pathlength of Solar Energetic Particles?
Solar energetic particles (SEPs), accelerated during solar eruptions, propagate in turbulent solar wind before being observed with in …
T. Laitinen, S. Dalla
Cite DOI arXiv
Forecasting Solar Energetic Particle Fluence with Multi-Spacecraft Observations
Forecasting Solar Energetic Particle (SEP) fluence, as integrated over an SEP event, is an important element when estimating the effect …
T. Laitinen, S. Dalla, M. Battarbee, M. S. Marsh
Cite DOI arXiv
The effect of turbulence strength on meandering field lines and Solar Energetic Particle event extents
Insights into the processes of Solar Energetic Particle (SEP) propagation are essential for understanding how solar eruptions affect …
Timo Laitinen, Frederic Effenberger, Andreas Kopp, Silvia Dalla
Cite DOI arXiv
Early propagation of energetic particles across the mean field in turbulent plasmas
Propagation of energetic particles across the mean field direction in turbulent magnetic fields is often described as spatial …
T. Laitinen, S. Dalla, D. Marriott
Cite DOI arXiv
Time dependence of Fe/O ratio within a 3D solar energetic particle propagation model including drift
Context. The intensity profiles of iron and oxygen in Solar Energetic Particle (SEP) events often display differences that result in a …
S. Dalla, M. S. Marsh, P. Zelina, T. Laitinen
Cite DOI arXiv
Energetic Particle Transport across the Mean Magnetic Field: Before Diffusion
Current particle transport models describe the propagation of charged particles across the mean field direction in turbulent plasmas as …
T. Laitinen, S. Dalla
Cite DOI arXiv
Solar energetic particle access to distant longitudes through turbulent field-line meandering
Context. Current solar energetic particle (SEP) propagation models describe the effects of interplanetary plasma turbulence on SEPs as …
T. Laitinen, A. Kopp, F. Effenberger, S. Dalla, M. S. Marsh
Cite DOI arXiv