141 citations · 2.6k across the 78 of their papers we have counts for
40 papers · 1 filter
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…
Review of Machine Learning Models for Solar Energetic Particle Prediction
Spiridon Kasapis, Pouya Hosseinzadeh, Kathryn Whitman +73
Solar energetic particle (SEP) events have attracted increasing attention due to their significant radiation hazards for aviation, spacecraft electronics, and human missions beyond…
Parker Solar Probe observations of solar energetic particle (SEP) events with inverse velocity arrival (IVA) features
Zigong Xu, C. M. S. Cohen, R. A. Leske +21
In SEP events, velocity dispersion (VD) is characterized by the earlier arrival of faster, higher-energy particles relative to slower ones, assuming negligible acceleration time an…
Energy-dependent SEP Fe/O abundances during the May 2024 superstorm
G. D. Muro, C. M. S. Cohen, Z. Xu +16
During mid-May 2024, active region (AR) 13664 produced a series of M- and X-class flares along with several coronal mass ejections (CMEs) that resulted in exceptionally strong auro…
Radial dependence of ion fluences in the 2023 July 17 SEP event from Parker Solar Probe to STEREO and ACE
G. D. Muro, C. M. S Cohen, Z. Xu +18
In the latter moments of 17 July 2023, the solar active region 13363, near the southwestern face of the Sun, was undergoing considerable evolution, which resulted in a significant…
Composition variation of the May 16 2023 Solar Energetic Particle Event observed by Solar Orbiter and Parker Solar Probe
Z. G. Xu, C. M. S Cohen, R. A. Leske +13
In this study, we employ the combined charged particle measurements from Integrated Science Investigation of the Sun (\ISOIS) onboard the Parker Solar Probe (PSP) and Energetic Par…
Magnetic reconnection-driven energization of protons up to 400 keV at the near-Sun heliospheric current sheet
M. I. Desai, J. F. Drake, T. Phan +22
We report observations of direct evidence of energetic protons being accelerated above ~400 keV within the reconnection exhaust of a heliospheric current sheet (HCS) crossing by NA…
Energetic Particles from Quasi-Separatrix Layers and Current Sheets at the Sun
Nathan A. Schwadron, Ronald M. Caplan, Jon A. Linker +2
Quasi-separatrix layers (QSLs) at the Sun are created from regions where channels of open magnetic flux have footpoints near regions of large-scale closed magnetic flux. These regi…
IBEX Observations of Elastic Scattering of Interstellar Helium by Solar Wind Particles
H. Islam, N. Schwadron, E. Moebius +8
The IBEX-Lo instrument on the Interstellar Boundary Explorer (IBEX) mission observes primary and secondary interstellar helium in its 4 lowest energy steps. Observations of these h…
Parker Solar Probe Observations of Energetic Particles in the Flank of a Coronal Mass Ejection Close to the Sun
N. A. Schwadron, Stuart D. Bale, J. Bonnell +32
We present an event observed by Parker Solar Probe at 0.2 au on March 2, 2022 in which imaging and \emph{in situ} measurements coincide. During this event, PSP passed through…
Science Opportunities for IMAP-Lo Observations of Interstellar Neutral Hydrogen and Deuterium During a Maximum of Solar Activity
Marzena A. Kubiak, Maciej Bzowski, Eberhard Moebius +1
Direct-sampling observations of interstellar neutral gas, including hydrogen and deuterium, have been performed for more than one cycle of solar activity by IBEX. IBEX viewing is r…
Determining the ionization rates of interstellar neutral species using direct-sampling observations of their direct and indirect beams
M. Bzowski, M. A. Kubiak, E. Moebius +1
A good understanding of the ionization rates of neutral species in the heliosphere is important for studies of the heliosphere and planetary atmospheres. So far, the intensities of…
Thermodynamics of the inner heliosheath
G. Livadiotis, D. J. McComas, H. O. Funsten +3
We derive annual skymaps of the proton temperature in the inner heliosheath (IHS), and track their temporal evolution over the years from 2009 to 2016 of Interstellar Boundary Expl…
Breaking correlation in the inflow parameters of interstellar neutral gas in direct-sampling observations
M. Bzowski, M. A. Kubiak, E. Möbius +1
We analyze the reasons for the correlation between the temperature, direction, and speed of the interstellar neutral gas inflow into the heliosphere, obtained in analyzes of observ…
PSP/ISIS Observation of a Solar Energetic Particle Event Associated With a Streamer Blowout Coronal Mass Ejection During Encounter 6
T. Getachew, D. J. McComas, C. J. Joyce +21
In this paper we examine a low-energy SEP event observed by ISIS's Energetic Particle Instrument-Low (EPI-Lo) inside 0.18 AU on September 30, 2020. This small SEP event has…
Suprathermal Ion Energy spectra and Anisotropies near the Heliospheric Current Sheet crossing observed by the Parker Solar Probe during Encounter 7
M. I. Desai, D. G. Mitchell, D. J. McComas +31
We present observations of >10-100 keV/nucleon suprathermal (ST) H, He, O, and Fe ions associated with crossings of the heliospheric current sheet (HCS) at radial distances <0.1 au…
Anomalous Cosmic Ray Oxygen Observations in to 0.1 au
Jamie S. Rankin, David J. McComas, Richard A. Leske +10
The Integrated Science Investigation of the Sun instrument suite onboard NASA's Parker Solar Probe mission continues to measure solar energetic particles and cosmic rays closer to…
Parker Solar Probe Observations of Helical Structures as Boundaries for Energetic Particles
F. Pecora, S. Servidio, A. Greco +15
Energetic particle transport in the interplanetary medium is known to be affected by magnetic structures. It has been demonstrated for solar energetic particles in near-Earth orbit…
Switchbacks Explained: Super-Parker Fields -- the Other Side of the Sub-Parker Spiral
N. A. Schwadron, D. J. McComas
We provide a simple geometric explanation for the source of switchbacks and associated large and one-sided transverse flows in the solar wind observed by Parker Solar Probe. The mo…
Energetic Proton Propagation and Acceleration Simulated for the Bastille Day Event of July 14, 2000
Matthew A. Young, Nathan A. Schwadron, Matthew Gorby +9
This work presents results from simulations of the 14 July 2000 ("Bastille Day") solar proton event. We used the Energetic Particle Radiation Environment Model (EPREM) and the CORo…
Science Opportunities from Observations of the Interstellar Neutral Gas with Adjustable Boresight Direction
Justyna M. Sokół, Marzena A. Kubiak, Maciej Bzowski +2
The interstellar neutral (ISN) gas enters the heliosphere and is detected at a few au from the Sun, as demonstrated by Ulysses and the nterstellar Boundary Explorer (IBEX) missions…
Observations of the 2019 April 4 Solar Energetic Particle Event at the Parker Solar Probe
R. A. Leske, E. R. Christian, C. M. S. Cohen +33
A solar energetic particle event was detected by the Integrated Science Investigation of the Sun (ISOIS) instrument suite on Parker Solar Probe (PSP) on 2019 April 4 when the space…
Seed Population Pre-Conditioning and Acceleration Observed by Parker Solar Probe
N. A. Schwadron, S. Bale, J. Bonnell +42
A series of solar energetic particle (SEP) events were observed at Parker Solar Probe (PSP) by the Integrated Science Investigation of the Sun (\ISOIS) during the period from April…
Heliospheric structure as revealed by the 3 -- 88 keV H ENA spectra
A. Czechowski, M. Bzowski, J. M. Sokół +8
Energetic neutral atoms (ENA) are an important tool for investigating the structure of the heliosphere. Recently, it was observed that fluxes of ENAs (with energy 55 keV) com…