112 citations · 568 across the 21 of their papers we have counts for
11 papers · 1 filter
The polytropic behavior of Solar Wind protons as observed by Ulysses spacecraft during Solar minimum
Georgios Nicolaou, George Livadiotis, David J. McComas
We analyze proton bulk parameters derived from Ulysses observations and investigate the polytropic behavior of solar wind protons over a wide range of heliocentric distances and la…
Distinct polytropic behavior of plasma during ICME-HSS Interaction
Kalpesh Ghag, Anil Raghav, Zubair Shaikh +3
Interplanetary Coronal Mass Ejections (ICMEs) and High Speed Streams (HSSs) are noteworthy drivers of disturbance of interplanetary space. Interaction between them can cause severa…
The Kinetic Expansion of Solar-Wind Electrons: Transport Theory and Predictions for the very Inner Heliosphere
Seong-Yeop Jeong, Daniel Verscharen, Christian Vocks +9
We propose a transport theory for the kinetic evolution of solar-wind electrons in the heliosphere. We derive a gyro-averaged kinetic transport equation that accounts for the spher…
Whistler instability driven by the sunward electron deficit in the solar wind
Laura Berčič, Daniel Verscharen, Christopher J. Owen +18
Solar wind electrons play an important role in the energy balance of the solar wind acceleration by carrying energy into interplanetary space in the form of electron heat flux. The…
First-year ion-acoustic wave observations in the solar wind by the RPW/TDS instrument onboard Solar Orbiter
D. Píša, J. Souček, O. Santolík +21
Electric field measurements of the Time Domain Sampler (TDS) receiver, part of the Radio and Plasma Waves (RPW) instrument on board Solar Orbiter, often exhibit very intense broadb…
Three-dimensional magnetic reconnection in particle-in-cell simulations of anisotropic plasma turbulence
Jeffersson A. Agudelo Rueda, Daniel Verscharen, Robert T. Wicks +6
We use 3D fully kinetic particle-in-cell simulations to study the occurrence of magnetic reconnection in a simulation of decaying turbulence created by anisotropic counter-propagat…
Relationship between polytropic index and temperature anisotropy in space plasmas
George Livadiotis, George Nicolaou
The paper develops a theoretical relationship between the polytropic index and the temperature anisotropy that may characterize space plasmas. The derivation is based on the correl…
Polytropic Behavior of Solar Wind Protons Observed by Parker Solar Probe
Georgios Nicolaou, George Livadiotis, Robert T. Wicks +2
A polytropic process describes the transition of a fluid from one state to another through a specific relationship between the fluid density and temperature. The value of the polyt…
The Impact of Turbulent Solar Wind Fluctuations on Solar Orbiter Plasma Proton Measurements
Georgios Nicolaou, Daniel Verscharen, Robert T. Wicks +1
Solar Orbiter will observe the Sun and the inner heliosphere to study the connections between solar activity, coronal structure, and the origin of the solar wind. The plasma instru…
The Fluid-like Behavior of Kinetic Alfvén Turbulence in Space Plasma
Honghong Wu, Daniel Verscharen, Robert T. Wicks +3
Kinetic Alfvén waves (KAWs) are the short-wavelength extension of the MHD Alfvén-wave branch in the case of highly-oblique propagation with respect to the background magnetic field…
Misestimation of temperature when applying Maxwellian distributions to space plasmas described by kappa distributions
Georgios Nicolaou, George Livadiotis
This paper presents the misestimation of temperature when observations from a kappa distributed plasma are analyzed as a Maxwellian. One common method to calculate the space plasma…