55 citations · 292 across the 20 of their papers we have counts for
8 papers · 1 filter
High-Resolution Observations of Pickup Ion Mediated Shocks to 60 au
Bishwas L. Shrestha, David J. McComas, Eric J. Zirnstein +10
This study provides a detailed analysis of fourteen distant interplanetary shocks observed by the Solar Wind Around Pluto (SWAP) instrument onboard New Horizons. These shocks were…
What defines stationarity in space plasmas
George Livadiotis, David J. McComas
Starting from the concept of entropy defect in thermodynamics, we construct the entropy formulation of space plasmas, and then use it to develop a measure of their stationarity. In…
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…
Radial profile of the polytropic index of solar wind plasma in the heliosphere
George Livadiotis
We combine different measurements of the polytropic index of the proton plasma in the heliosphere: i) near-adiabatic index in the inner heliosphere ~1AU, ii) subadiabatic indices i…
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…
Estimation of turbulent heating of solar wind protons at 1AU
George Livadiotis, Maher A. Dayeh, Gary P. Zank
The paper presents a new method for deriving turbulent heating of the solar wind using plasma moments and magnetic field data. We develop the method and then apply it to compute th…
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…
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…