112 citations · 1.1k across the 73 of their papers we have counts for
18 papers · 1 filter
Delayed maximum energy solar energetic particle events: Statistical analysis from Solar Orbiter
R. C. Allen, G. C. Ho, G. M. Mason +9
Investigations of solar energetic particles (SEPs) have long utilized the dispersive nature of onset times, as in, the earlier arrival of higher-energy particles compared to lower-…
Energetic particle-mediated interplanetary shocks observed by Solar Orbiter
D. Trotta, D. Lario, B. Reville +10
Context: In collisionless shocks, energetic particles can carry sufficient pressure to modify the upstream plasma and the shock structure itself, a regime often invoked in theories…
Compressive Structures in the Foreshock of Collisionless Shocks
Savvas Raptis, Domenico Trotta, Drew L. Turner +11
Collisionless shocks are fundamental accelerators of energetic particles; yet, the observations of nonlinear foreshock structures, which are essential in acceleration processes, di…
Anomalous cosmic rays within the inner heliosphere: Observations of helium by the High Energy Telescope onboard Solar Orbiter
Zigong Xu, Robert F. Wimmer-Schweingruber, Lars Berger +11
Radial gradients of cosmic rays are key parameters for understanding the transport of particles in space. Solar Orbiter, launched on 2020 February 10, approaches the Sun approximat…
Nowcasting Solar Energetic Particle Events for Mars Missions
Jan Leo Löwe, Salman Khaksarighiri, Robert F. Wimmer-Schweingruber +8
In addition to the omnipresent Galactic Cosmic Rays (GCRs), sudden solar energetic particle (SEP) events present considerable health hazards for manned space missions. These events…
Irregular proton injection to high energies at interplanetary shocks
Domenico Trotta, Timothy S. Horbury, David Lario +8
How thermal particles are accelerated to suprathermal energies is an unsolved issue, crucial for many astrophysical systems. We report novel observations of irregular, dispersive e…
Backstreaming ions at a high Mach number interplanetary shock: Solar Orbiter measurements during the nominal mission phase
Andrew P. Dimmock, Michael Gedalin, Ahmad Lalti +9
Solar Orbiter, a mission developed by the European Space Agency, explores in situ plasma across the inner heliosphere while providing remote-sensing observations of the Sun. Our st…
Primary and albedo protons detected by the Lunar Lander Neutron and Dosimetry (LND) experiment on the lunar farside
Zigong Xu, Jingnan Guo, Robert F. Wimmer-Schweingruber +4
The Lunar Lander Neutron and Dosimetry (LND) Experiment aboard the ChangE-4 Lander on the lunar-far side measures energetic charged and neutral particles and monitors the corres…
Energy Balance at Interplanetary Shocks: In-situ Measurement of the Fraction in Supra-thermal and Energetic Particles with ACE and Wind
Liam David, Federico Fraschetti, Joe Giacalone +3
The acceleration of charged particles by interplanetary shocks can drain a non-negligible fraction of the upstream ram pressure. For a sample of shocks observed in-situ at 1 AU by…
Comparing the Properties of ICME-Induced Forbush Decreases at Earth and Mars
Johan L. Freiherr von Forstner, Jingnan Guo, Robert F. Wimmer-Schweingruber +9
Forbush decreases (FDs), which are short-term drops in the flux of galactic cosmic rays, are caused by the shielding from strong and/or turbulent magnetic structures in the solar w…
Tracking and Validating ICMEs Propagating Toward Mars Using STEREO Heliospheric Imagers Combined With Forbush Decreases Detected by MSL/RAD
Johan L. Freiherr von Forstner, Jingnan Guo, Robert F. Wimmer-Schweingruber +7
The Radiation Assessment Detector (RAD) instrument onboard the Mars Science Laboratory (MSL) mission's Curiosity rover has been measuring galactic cosmic rays (GCR) as well as sola…
Ready functions for calculating the Martian radiation environment
Jingnan Guo, Robert F. Wimmer-Schweingruber, Manuel Grande +2
It is extremely important to understand and model the Martian radiation environment in preparation for future human missions to Mars, especially during extreme and elevated conditi…
Implementation and validation of the GEANT4/AtRIS code to model the radiation environment at Mars
Jingnan Guo, Saša Banjac, Lennart Roestel +4
A new GEANT4 particle transport model -- the Atmospheric Radiation Interaction Simulator (AtRIS, Banjac et al. 2018a. J. Geophys. Res.) -- has been recently developed in order to m…
Observations of high and low Fe charge states in individual solar wind streams with coronal-hole origin
Verena Heidrich-Meisner, Thies Peleikis, Martin Kruse +2
The solar wind originating from coronal holes is comparatively well-understood and is characterized by lower densities and average charge states compared to the so-called slow sola…
Evolution of an equatorial coronal hole structure and the released coronal hole wind stream: Carrington rotations 2039 to 2050
Verena Heidrich-Meisner, Thies Peleikis, Martin Kruse +2
The Sun is a highly dynamic environment that exhibits dynamic behavior on many different timescales. In particular, coronal holes exhibit temporal and spatial variability. Signatur…
Modeling the evolution and propagation of the 2017 September 9th and 10th CMEs and SEPs arriving at Mars constrained by remote-sensing and in-situ measurement
Jingnan Guo, Mateja Dumbović, Robert F. Wimmer-Schweingruber +13
On 2017-09-10, solar energetic particles (SEPs) originating from the active region 12673 were registered as a ground level enhancement (GLE) at Earth and the biggest GLE on the sur…
Using Forbush decreases to derive the transit time of ICMEs propagating from 1 AU to Mars
Johan L. Freiherr von Forstner, Jingnan Guo, Robert F. Wimmer-Schweingruber +13
The propagation of 15 interplanetary coronal mass ejections (ICMEs) from Earth's orbit (1 AU) to Mars (~ 1.5 AU) has been studied with their propagation speed estimated from both m…
Variations of dose rate observed by MSL/RAD in transit to Mars
Jingnan Guo, Cary Zeitlin, Robert F. Wimmer-Schweingruber +14
Aims: To predict the cruise radiation environment related to future human missions to Mars, the correlation between solar modulation potential and the dose rate measured by the Rad…