129 citations · 772 across the 32 of their papers we have counts for
35 papers
Does Diffusive Shock Acceleration Reach Steady State? Insights from a Near-Sun Shock Observed by Parker Solar Probe
Immanuel Christopher Jebaraj, Mikhail Malkov, Nicolas Wijsen +7
Collisionless shocks accelerate particles at a rate set by the diffusion coefficient of those particles in waves they themselves generate. Theory fixes that coefficient only in ste…
The Wave-Regulated Precursor of a Near-Parallel Interplanetary Shock Observed by Parker Solar Probe
Immanuel Christopher Jebaraj, Lucas Colomban, Oleksiy Agapitov +7
Diffusive shock acceleration, at shocks from coronal mass ejections to supernova-remnant blast waves, presupposes a scattering wave field that the accelerated particles themselves…
Energetic Particle Acceleration and Transport: Interplanetary Coronal Mass Ejections and Shocks
Olga E. Malandraki, Christina M. S. Cohen, Joe Giacalone +16
Solar Energetic Particles from suprathermal (few keV) up to relativistic (few GeV) energies constitute an important contributor to the characterization of the space environment. Em…
Sunward Streaming 3He-rich SEP Events Observed by Solar Orbiter and Parker Solar Probe during Perihelion Passage
Samuel T. Hart, George C. Ho, Michael R. Terres +7
We report on two 3He-rich solar energetic particle (SEP) events observed by Solar Orbiter (SO) and Parker Solar Probe (PSP) during the April 1 - 4, 2024 conjunction when both space…
Coronal flux tube illuminated by strong shock spot: New Year's Eve solar eruption of 2023-Dec-31
Illya Plotnikov, Alexis P. Rouillard, Athanasios Kouloumvakos +1
Powerful solar eruptions are known to produce fast and wide shock waves in the solar corona and inner heliosphere. The relationship between the coronal shock waves, solar energetic…
Evidence of Time-Dependent Diffusive Shock Acceleration in the 2022 September 5 Solar Energetic Particle Event
Xiaohang Chen, Lulu Zhao, Joe Giacalone +15
On 2022 September 5, a large solar energetic particle (SEP) event was detected by Parker Solar Probe (PSP) and Solar Orbiter (SolO), at heliocentric distances of 0.07 and 0.71 au,…
Freely propagating flanks of wide coronal-mass-ejection-driven shocks: Modelling and observational insights
N. Wijsen, I. C. Jebaraj, N. Dresing +3
Widespread solar energetic particle (SEP) events remain poorly understood phenomena in space weather. These events are often linked to coronal mass ejections (CMEs) and their shock…
Investigation of Inverse Velocity Dispersion in a Solar Energetic Particle Event Observed by Solar Orbiter
Zheyi Ding, F. Robert Wimmer-Schweingruber, Alexander Kollhoff +15
Inverse velocity dispersion (IVD) events, characterized by higher-energy particles arriving later than lower-energy particles, challenge the classical understanding of SEP events a…
Multi-Mission Observations of Relativistic Electrons and High-Speed Jets Linked to Shock Generated Transients
Savvas Raptis, Martin Lindberg, Terry Z. Liu +19
Shock-generated transients, such as hot flow anomalies (HFAs), upstream of planetary bow shocks, play a critical role in electron acceleration. Using multi-mission data from NASA's…
Radial Evolution of ICME-Associated Particle Acceleration Observed by Solar Orbiter and ACE
Malik H. Walker, Robert C. Allen, Gang Li +5
On 2022 March 10, a coronal mass ejection (CME) erupted from the Sun, resulting in Solar Orbiter observations at 0.45 au of both dispersive solar energetic particles arriving prior…
The evolution of coronal shock wave properties and their relation with solar energetic particles
Manon Jarry, Nina Dresing, Alexis P. Rouillard +5
Shock waves driven by fast and wide coronal mass ejections (CMEs) are highly efficient particle accelerators involved in the production of solar energetic particle (SEP) events. Th…
Acceleration of electrons and ions by an "almost" astrophysical shock in the heliosphere
Immanuel Christopher Jebaraj, Oleksiy Agapitov, Vladimir Krasnoselskikh +18
Collisionless shock waves, ubiquitous in the universe, are crucial for particle acceleration in various astrophysical systems. Currently, the heliosphere is the only natural enviro…
The multi-spacecraft high-energy solar particle event of 28 October 2021
A. Kouloumvakos, A. Papaioannou, C. O. G. Waterfall +15
Aims. We studied the first multi-spacecraft high-energy solar energetic particle (SEP) event of solar cycle 25, which triggered a ground level enhancement (GLE) on 28 October 2021,…
Modelling two Energetic Storm Particle Events Observed by Solar Orbiter Using the Combined EUHFORIA and iPATH Models
Zheyi Ding, Gang Li, Glenn Mason +6
By coupling the EUropean Heliospheric FORcasting Information Asset (EUHFORIA) and the improved Particle Acceleration and Transport in the Heliosphere (iPATH) model, two energetic s…
Variability of the slow solar wind: New insights from modelling and PSP-WISPR observations
Nicolas Poirier, Victor Réville, Alexis P. Rouillard +2
We analyse the signature and origin of transient structures embedded in the slow solar wind, and observed by the Wide-Field Imager for Parker Solar Probe (WISPR) during its first t…
The effect of the ambient solar wind medium on a CME-driven shock and the associated gradual solar energetic particle event
Nicolas Wijsen, David Lario, Beatriz Sánchez-Cano +15
We present simulation results of a gradual solar energetic particle (SEP) event detected on 2021 October 9 by multiple spacecraft, including BepiColombo (Bepi) and near-Earth space…
HelioCast: heliospheric forecasting based on white-light observations of the solar corona. I. Solar minimum conditions
Victor Réville, Nicolas Poirier, Athanasios Kouloumvakos +8
We present a new 3D MHD heliospheric model for space-weather forecasting driven by boundary conditions defined from white-light observations of the solar corona. The model is based…
The 17 April 2021 widespread solar energetic particle event
N. Dresing, L. Rodríguez-García, I. C. Jebaraj +46
Context. A solar eruption on 17 April 2021 produced a widespread Solar Energetic Particle (SEP) event that was observed by five longitudinally well-separated observers in the inner…
Multiple injections of energetic electrons associated with the flare/CME event on 9 October 2021
Immanuel Christopher Jebaraj, Athanasios Kouloumvakos, Nina Dresing +11
We study the solar energetic particle (SEP) event observed on 9 October 2021, by multiple spacecraft including Solar Orbiter (SolO). The event was associated with an M1.6 flare, a…
Solar activity relations in energetic electron events measured by the MESSENGER mission
L. Rodríguez-García, L. A. Balmaceda, R. Gómez-Herrero +10
Aims. We perform a statistical study of the relations between the properties of solar energetic electron (SEE) events measured by the MESSENGER mission from 2010 to 2015 and the pa…
Solar energetic electron events measured by MESSENGER and Solar Orbiter. Peak intensity and energy spectrum radial dependences: statistical analysis
L. Rodríguez-García, R. Gómez-Herrero, N. Dresing +10
Context/Aims: We present a list of 61 solar energetic electron (SEE) events measured by the MESSENGER mission and the radial dependences of the electron peak intensity and the peak…
Single-spacecraft techniques for shock parameters estimation: A systematic approach
Domenico Trotta, Laura Vuorinen, Heli Hietala +8
Spacecraft missions provide the unique opportunity to study the properties of collisionless shocks utilising in situ measurements. In the past years, several diagnostics have been…
Solar-MACH: An open-source tool to analyze solar magnetic connection configurations
Jan Gieseler, Nina Dresing, Christian Palmroos +10
The Solar MAgnetic Connection HAUS tool (Solar-MACH) is an open-source tool completely written in Python that derives and visualizes the spatial configuration and solar magnetic co…
The First Ground Level Enhancement of Solar Cycle 25 on 28 October 2021
A. Papaioannou, A. Kouloumvakos, A. Mishev +8
Aims. The first relativistic solar proton event of solar cycle 25 (SC25) was detected on 28 October 2021 by neutron monitors (NMs) on the ground and particle detectors onboard spac…