43 citations · 325 across the 15 of their papers we have counts for
15 papers
The 2024 July 16 Solar Event: A Challenge To The Coronal Mass Ejection Origin Of Long-Duration Gamma-Ray Flares
Alessandro Bruno, Melissa Pesce-Rollins, Silvia Dalla +3
We present a multi-spacecraft analysis of the 2024 July 16 Long-Duration Gamma-Ray Flare (LDGRF) detected by the Large Area Telescope on the Fermi satellite. The measured >100 MeV…
Forecasting >300 MeV SEP events: Extending SPARX to high energies
Charlotte O. G. Waterfall, Silvia Dalla, Mike S. Marsh +2
The forecasting of solar energetic particles (SEPs) is a prominent area of space weather research. Numerous forecasting models exist that predict SEP event properties at proton ene…
High Energy Solar Particle Events and Their Relationship to Associated Flare, CME and GLE Parameters
Charlotte Waterfall, Silvia Dalla, Osku Raukunen +3
Large solar eruptive events, including solar flares and coronal mass ejections (CMEs), can lead to solar energetic particle (SEP) events. During these events, protons are accelerat…
3D propagation of relativistic solar protons through interplanetary space
S. Dalla, G. De Nolfo, A. Bruno +5
Context. Solar Energetic Particles (SEPs) with energy in the GeV range can propagate to Earth from their acceleration region near the Sun and produce Ground Level Enhancements (GLE…
From Sun to interplanetary space: What is the pathlength of Solar Energetic Particles?
T. Laitinen, S. Dalla
Solar energetic particles (SEPs), accelerated during solar eruptions, propagate in turbulent solar wind before being observed with in situ instruments. In order to interpret their…
Comparing Long-Duration Gamma-Ray Flares and High-Energy Solar Energetic Particles
G. A. de Nolfo, A. Bruno, J. M. Ryan +10
Little is known about the origin of the high-energy and sustained emission from solar Long-Duration Gamma-Ray Flares (LDGRFs), identified with the Compton Gamma Ray Observatory (CG…
Multi-spacecraft observations and transport simulations of solar energetic particles for the May 17th 2012 event
M. Battarbee, J. Guo, S. Dalla +3
The injection, propagation and arrival of solar energetic particles (SEPs) during eruptive solar events is an important and current research topic of heliospheric physics. During t…
Time Evolution of Elemental Ratios in Solar Energetic Particle events
P. Zelina, S. Dalla, C. M. S. Cohen +1
Heavy ion ratio abundances in Solar Energetic Particle (SEP) events, e.g.~Fe/O, often exhibit decreases over time. Using particle instruments on the ACE, SOHO and STEREO spacecraft…
Solar Energetic Particle drifts and the energy dependence of 1 AU charge states
S. Dalla, M. S. Marsh, M. Battarbee
The event-averaged charge state of heavy ion Solar Energetic Particles (SEPs), measured at 1 AU from the Sun, typically increases with the ions' kinetic energy. The origin of this…
Drift-induced deceleration of Solar Energetic Particles
S. Dalla, M. S. Marsh, T. Laitinen
We investigate the deceleration of Solar Energetic Particles (SEPs) during their propagation from the Sun through interplanetary space, in the presence of weak to strong scattering…
SPARX: a modelling system for Solar Energetic Particle Radiation Space Weather forecasting
M. S. Marsh, S. Dalla, M. Dierckxsens +2
The capability to predict the parameters of an SEP event such as its onset, peak flux, and duration is critical to assessing any potential space weather impact. We present a new fl…
A numerical simulation of solar energetic particle dropouts during impulsive events
Y. Wang, G. Qin, M. Zhang +1
This paper investigates the conditions for producing rapid variations of solar ener- getic particle (SEP) intensity commonly known as dropouts. In particular, we use numerical mode…
Energetic Particle Diffusion In Structured Turbulence
Timo Laitinen, Silvia Dalla, James Kelly
In the full-orbit particle simulations of energetic particle transport in plasmas, the plasma turbulence is typically described as a homogeneous superposition of linear Fourier mod…
Cross-Field Transport of Solar Energetic Particles in a Large-Scale Fluctuating Magnetic Field
James Kelly, Silvia Dalla, Timo Laitinen
The trajectories of Solar Energetic Particles (SEPs) in an Interplanetary Magnetic Field (IMF) exhibiting large-scale fluctuations due to footpoint motions originating in the photo…
Automatic Detection of Limb Prominences in 304 A EUV Images
Nicolas Labrosse, Silvia Dalla, Steve Marshall
A new algorithm for automatic detection of prominences on the solar limb in 304 A EUV images is presented, and results of its application to SOHO/EIT data discussed. The detection…