323 citations · 1.7k across the 27 of their papers we have counts for
27 papers
HelioSwarm: A Multipoint, Multiscale Mission to Characterize Turbulence
Kristopher G. Klein, Harlan Spence, Olga Alexandrova +47
HelioSwarm (HS) is a NASA Medium-Class Explorer mission of the Heliophysics Division designed to explore the dynamic three-dimensional mechanisms controlling the physics of plasma…
Effect of a guide field on the turbulence like properties of magnetic reconnection
Subash Adhikari, Michael A. Shay, Tulasi N. Parashar +4
The effect of an external guide field on the turbulence-like properties of magnetic reconnection is studied using five different 2.5D kinetic particle-in-cell (PIC) simulations. Th…
Space Plasma Physics Science Opportunities for the Lunar Orbital Platform -Gateway
Iannis Dandouras, Matt G G T Taylor, Johan de Keyser +26
The Lunar Orbital Platform-Gateway (LOP-Gateway, or simply Gateway) is a crewed platform that will be assembled and operated in the vicinity of the Moon by NASA and international p…
Successive interacting coronal mass ejections: How to create a perfect storm?
Gordon J. Koehn, Ravindra T. Desai, Emma E. Davies +3
Coronal mass ejections (CMEs) are the largest type of eruptions on the Sun and the main driver of severe space weather at the Earth. In this study, we implement a force-free sphero…
Magnetic reconnection as a mechanism to produce multiple protonpopulations and beams locally in the solar wind
B. Lavraud, R. Kieokaew, N. Fargette +37
Context. Spacecraft observations early revealed frequent multiple proton populations in the solar wind. Decades of research on their origin have focused on processes such as magnet…
Drift Orbit Bifurcations and Cross-field Transport in the Outer Radiation Belt: Global MHD and Integrated Test-Particle Simulations
R. T. Desai, J. P. Eastwood, R. B. Horne +10
Energetic particle fluxes in the outer magnetosphere present a significant challenge to modelling efforts as they can vary by orders of magnitude in response to solar wind driving…
Interplanetary Shock-induced Magnetopause Motion: Comparison between Theory and Global Magnetohydrodynamic Simulations
Ravindra T. Desai, Mervyn P. Freeman, Jonathan P. Eastwood +10
The magnetopause marks the outer edge of the Earth's magnetosphere and a distinct boundary between solar wind and magnetospheric plasma populations. In this letter, we use global m…
Magnetic reconnection as an energy cascade process
S. Adhikari, T. N. Parashar, M. A. Shay +5
Reconnection and turbulence are two of the most commonly observed dynamical processes in plasmas, but their relationship is still not fully understood. Using 2.5D kinetic particle-…
Multi-spacecraft Study of the Solar Wind at Solar Minimum: Dependence on Latitude and Transient Outflows
R. Laker, T. S. Horbury, S. D. Bale +15
The recent launches of Parker Solar Probe (PSP), Solar Orbiter (SO) and BepiColombo, along with several older spacecraft, have provided the opportunity to study the solar wind at m…
The Solar Orbiter Science Activity Plan: translating solar and heliospheric physics questions into action
I. Zouganelis, A. De Groof, A. P. Walsh +182
Solar Orbiter is the first space mission observing the solar plasma both in situ and remotely, from a close distance, in and out of the ecliptic. The ultimate goal is to understand…
Spatial variations of low mass negative ions in Titan's upper atmosphere
Teodora Mihailescu, Ravindra Desai, Oleg Shebanits +5
Observations with Cassini's Electron Spectrometer discovered negative ions in Titan's ionosphere, at altitudes between 1400 and 950 km. Within the broad mass distribution extending…
Parker Solar Probe In-Situ Observations of Magnetic Reconnection Exhausts During Encounter 1
T. D. Phan, S. D. Bale, J. P. Eastwood +23
Magnetic reconnection in current sheets converts magnetic energy into particle energy. The process may play an important role in the acceleration and heating of the solar wind clos…
Reconnection from a Turbulence Perspective
S. Adhikari, M. A. Shay, T. N. Parashar +6
The spectral properties associated with laminar, anti-parallel reconnection are examined using a 2.5D kinetic particle in cell (PIC) simulation. Both the reconnection rate and the…
Self-Similarity of ICME Flux Ropes: Observations by Radially Aligned Spacecraft in the Inner Heliosphere
S. W. Good, E. K. J. Kilpua, A. T. LaMoury +3
Interplanetary coronal mass ejections (ICMEs) are a significant feature of the heliospheric environment and the primary cause of adverse space weather at the Earth. ICME propagatio…
Observations of Magnetic Reconnection in the Transition Region of Quasi-Parallel Shocks
I. Gingell, S. J. Schwartz, J. P. Eastwood +15
Using observations of Earth's bow shock by the Magnetospheric Multiscale mission, we show for the first time that active magnetic reconnection is occurring at current sheets embedd…
Electron-Scale Dynamics of the Diffusion Region during Symmetric Magnetic Reconnection in Space
R. B. Torbert, J. L. Burch, T. D. Phan +46
Magnetic reconnection is an energy conversion process important in many astrophysical contexts including the Earth's magnetosphere, where the process can be investigated in-situ. H…
On the Role of Separatrix Instabilities in Heating the Reconnection Outflow Region
M. Hesse, C. Norgren, P. Tenfjord +10
A study of the role of microinstabilities at the reconnection separatrix can play in heating the electrons during the transition from inflow to outflow is being presented. We find…
CMEs in the Heliosphere: I. A Statistical Analysis of the Observational Properties of CMEs Detected in the Heliosphere from 2007 to 2017 by STEREO/HI-1
R. A. Harrison, J. A. Davies, D. Barnes +10
We present a statistical analysis of coronal mass ejections (CMEs) imaged by the Heliospheric Imager (HI) instruments aboard NASAs twin-spacecraft STEREO mission between April 2007…
Correlation of ICME Magnetic Fields at Radially Aligned Spacecraft
S. W. Good, R. J. Forsyth, J. P. Eastwood +1
The B-field structures of two ICMEs each observed by a pair of spacecraft close to radial alignment have been analysed. The ICMEs were observed in situ by MESSENGER and STEREO-B in…
Modeling observations of solar coronal mass ejections with heliospheric imagers verified with the Heliophysics System Observatory
C. Möstl, A. Isavnin, P. D. Boakes +18
We present an advance towards accurately predicting the arrivals of coronal mass ejections (CMEs) at the terrestrial planets, including Earth. For the first time, we are able to as…
Long-Term Tracking of Corotating Density Structures using Heliospheric Imaging
I. Plotnikov, A. P. Rouillard, J. A. Davies +12
The systematic monitoring of the solar wind in high-cadence and high-resolution heliospheric images taken by the Solar-Terrestrial Relation Observatory (STEREO) spacecraft permits…
Cassini in situ observations of long-duration magnetic reconnection in Saturn's magnetotail
Christopher S. Arridge, Jonathan P. Eastwood, Caitriona M. Jackman +15
Magnetic reconnection is a fundamental process in solar system and astrophysical plasmas, through which stored magnetic energy associated with current sheets is converted into ther…
Global impacts of a Foreshock Bubble: Magnetosheath, magnetopause and ground-based observations
Martin Archer, Drew Turner, Jonathan Eastwood +2
Using multipoint observations we show, for the first time, that Foreshock Bubbles (FBs) have a global impact on Earth's magnetosphere. We show that an FB, a transient kinetic pheno…
The role of pressure gradients in driving sunward magnetosheath flows and magnetopause motion
M. O. Archer, D. L. Turner, J. P. Eastwood +2
While pressure balance can predict how far the magnetopause will move in response to an upstream pressure change, it cannot determine how fast the transient reponse will be. Using…