Sun: Particle Emission

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
Drift-induced Deceleration of Solar Energetic Particles
We investigate the deceleration of solar energetic particles (SEPs) during their propagation from the Sun through interplanetary space, …
S. Dalla, M. S. Marsh, T. Laitinen
Cite DOI arXiv
Correcting for Interplanetary Scattering in Velocity Dispersion analysis of Solar Energetic Particles
To understand the origin of Solar Energetic Particles (SEPs), we must study their injection time relative to other solar eruption …
T. Laitinen, K. Huttunen-Heikinmaa, E. Valtonen, S. Dalla
Cite DOI arXiv
Solar Interacting Protons Versus Interplanetary Protons in the Core Plus Halo Model of Diffusive Shock Acceleration and Stochastic Re-acceleration
With the first observations of solar ensuremathγ-rays from the decay of pions, the relationship of protons producing ground level …
L. Kocharov, T. Laitinen, R. Vainio, A. Afanasiev, K. Mursula, J. M. Ryan
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Transmission and Emission of Solar Energetic Particles in Semi-transparent Shocks
While major solar energetic particle (SEP) events are associated with coronal mass ejection (CME)-driven shocks in solar wind, accurate …
Leon Kocharov, Timo Laitinen, Ilya Usoskin, Rami Vainio
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The Effect of Turbulence Intermittence on the Emission of Solar Energetic Particles by Coronal and Interplanetary Shocks
Major solar energetic particle events are associated with shock waves in solar corona and solar wind. Fast scattering of charged …
Leon Kocharov, Timo Laitinen, Rami Vainio
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Drift-induced Perpendicular Transport of Solar Energetic Particles
Drifts are known to play a role in galactic cosmic ray transport within the heliosphere and are a standard component of cosmic ray …
M. S. Marsh, S. Dalla, J. Kelly, T. Laitinen
Cite DOI arXiv
Energetic Particle Cross-field Propagation Early in a Solar Event
Solar energetic particles (SEPs) have been observed to easily spread across heliographic longitudes, and the mechanisms responsible for …
T. Laitinen, S. Dalla, M. S. Marsh
Cite DOI arXiv
Particle scattering in turbulent plasmas with amplified wave modes
High-energy particles stream during coronal mass ejections or flares through the plasma of the solar wind. This causes instabilities, …
S. Lange, F. Spanier, M. Battarbee, R. Vainio, T. Laitinen
Cite DOI arXiv
Cross-field Transport of Solar Energetic Particles in a Large-scale Fluctuating Magnetic Field
The trajectories of solar energetic particles in an interplanetary magnetic field exhibiting large-scale fluctuations due to footpoint …
J. Kelly, S. Dalla, T. Laitinen
Cite DOI arXiv