Supplement to: Electron energy partition across interplanetary shocks: III. Analysis

DOI10.5281/zenodo.3627284Zenodo3627284MaRDI QIDQ6723044

Dataset published at Zenodo repository.

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Publication date: 24 January 2020

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Quick Summary: The PDF file herein provides additional example superposed epoch analysis (SEA) plots in addition to reference tables of the upstream values used to normalize the SEA data in this file and those in the paper this supplement supports. This is a supplement to Part 3 of a three-part study of the electronvelocity distribution functions (VDFs) observed near interplanetary (IP) shocks by the Wind spacecraft. Paper I[Wilson et al., 2019a] introduced the methodology and data products[Wilson et al., 2019c] for fitting the electron VDFs to the sum of three model functions. Paper II[Wilson et al., 2019b] presents the statistics of the fit parameters produced and provided in the data products from Paper I. Paper III presents and summarizes the analysis of the fit parameters. The papers share the title Electron energy partition across interplanetary shocks. Wind Spacecraft: The Wind spacecraft (https://wind.nasa.gov) was launched on November 1, 1994 and currently orbits the first Lagrange point between the Earth and sun. It holds a suite of instruments from gamma ray detectors to quasi-static magnetic field instruments,Bo. The instruments used in this study and these datasets are the fluxgate magnetometer (MFI), the radio receivers (WAVES), ionFaraday cups (SWE), and the electron and ion electrostatic analyzers (3DP). The MFI measures 3-vectorBoat ~11 samples per second (sps); the SWE measures reduced VDFs of the thermal proton and alpha-particle populations from which velocity moments are derived and used herein; WAVES observes electromagnetic radiation from ~4 kHz to 12 MHz which provides an observation of the upper hybrid line (also called the plasma line) used to define the total electron density; and 3DP observes full 4 steradian VDFs of electrons and ions from a few eV to ~30 keV which provide both ion velocity moments and the electron VDFs modeled herein. PDF Supplement Description: Definitions: VDF = velocity distribution function Electron Components/Populations[taken fromWilson et al., 2019a,b] Core (s = ec): cold, dense population with energies\(E_{ec} \lesssim \text{15 eV}\) Halo (s = eh): hot, tenuous population with energies\(E_{eh} \gtrsim \text{20 eV}\) Beam/Strahl (s = eb): anti-sunward propagating, magnetic field-aligned beam (or strahl) with\(E_{eb} \sim \text{a few tens of eV}\) Effective (s = eff): effective total electron population, i.e., used for approximate moments rather than integrating entire VDF IonComponents/Populations[taken fromWilson et al., 2019a,b] Proton (s = p): core solar wind proton beam, i.e., main proton population streaming away from sun Alpha-particles (s = \(\alpha\)): alpha-particle magnetic field-aligned beam \(k_{B}\)=the Boltzmann constant [J K-1] \(\mu_{o}\)=permeability of free space [T m A-1] \(n_{s}\)= number density of speciess[cm-3] (s = ec for core, eh for halo, eb for beam/strahl, p for proton, etc.) \(B_{o, j}\)= jthcomponent (GSE coordinate basis) ofquasi-static magnetic field vector [nT] \(V_{Ts, j}\)= jthcomponent (relative toBo) of thermal speed of speciess[km/s] \(V_{Ts, j} = \sqrt{ \tfrac{ 2 \ k_{B} \ T_{s, j} }{ m_{s} }}\), where\(T_{s, j}\)is thejthcomponent (relative toBo) of the temperature of speciess[eV] \(V_{os, j}\)=jthcomponent (relative toBo) of drift speed of speciess[km/s] in ion rest frame \(V_{s, j}\)= jthcomponent (GSE coordinate basis) bulk velocity ofspeciess[km/s] in spacecraft frame \(T_{s, tot} = {1 \over 3} (T_{s, \parallel} + 2 \ T_{s, \perp})\), where\(\parallel(\perp)\)is the parallel(perpendicular) componentrelative toBo \(P_{s, j} = n_{s} \ k_{B} \ T_{s, j}\)=partial thermal pressure [eV cm-3] of the jth component of species s \(P_{t, j} = \sum_{s} \ P_{s, j}\)= totalthermal pressure [eV cm-3] of the jth component summed over all species including ions \(\mathcal{A}_{s} = \left(\tfrac{ T_{\perp} }{ T_{\parallel} } \right)_{s}\)=temperature anisotropy [N/A] of species s \(\xi_{s, j} = \tfrac{1}{2} m_{s} \ n_{s} \ V_{os, j}^{2}\)= ram energy density [eV cm-3] jth component of species s \(\epsilon_{j} = \tfrac{ B_{o}^{2} }{ 2 \ \mu_{o} } + \sum_{s} \left[ P_{s, j} + \xi_{s, j} \right]\)= total energy density [eV cm-3] of thejth componentof the system in the plasma bulk flow rest frame \(\zeta_{s, j} = \tfrac{ \xi_{s, j} }{ \epsilon_{j} }\)=ratio of the ram energy density of the jth component of species s to the total energy density [N/A] \(\psi_{s, j} = \tfrac{ P_{s, j} }{ \epsilon_{j} }\)=ratio of the thermal energy density of the jth component of species s to the total energy density [N/A] \(\Pi_{s, j} = \tfrac{ P_{s, j} }{ P_{t, j} }\)=ratio of the partial thermal pressure of the jth component of species s to the total thermal pressure [N/A] \(s_{es}\)= exponent for the symmetric self-similar model VDF ofspeciess \(\kappa_{es}\)= kappa value for the bi-kappa VDF ofspeciess \(p_{es}(q_{es})\)= parallel(perpendicular)exponent for the asymmetric self-similar model VDF ofspeciess \(n_{eff} = \sum_{s} \ n_{s}\)= effective number density of all electron populations \(T_{eff, j} = \tfrac{ \sum_{s} \ n_{s} \ T_{s, j} }{ n_{eff} }\)= effective temperature of thejth component of all electronspopulations \(\beta_{s, j} = \tfrac{ 2 \ \mu_{o} \ n_{s} \ k_{B} \ T_{s, j} }{ B_{o}^{2} }\)= plasma beta [N/A]of the jth component of species s This PDF supplement contains the following SEA plots: \(T_{s, j}\)vs\(\Delta\)t (for s = ec, eh, and eb and j = \(\parallel \text{ or } \perp \text{ or tot}\)) \(\mathcal{A}_{s}\)vs\(\Delta\)t (for s = ec, eh, and eb) \(\left( \tfrac{ T_{s} }{ T_{eff} } \right)_{j}\)vs\(\Delta\)t (for s = ec, eh, and eband j = \(\parallel \text{ or } \perp \text{ or tot}\)) \(\psi_{s, j}\)vs\(\Delta\)t (for s = ec, eh, eb, p, and \(\alpha\) and j = \(\parallel \text{ or } \perp \text{ or tot}\)) \(\Pi_{s, j}\)vs\(\Delta\)t (for s = ec, eh, eb, p, and \(\alpha\) and j = \(\parallel \text{ or } \perp \text{ or tot}\)) The PDF supplement contains tables of upstream median values for each shock used for normalizing the SEA plots, where the parameters listed include: \(T_{s, j}\)(for s = ec, eh, and eb andj = \(\parallel \text{ or } \perp \text{ or tot}\)) \(n_{s}\)(for s = ec, eh, eb, and eff andj = \(\parallel \text{ or } \perp \text{ or tot}\)) \(\tfrac{ n_{s} }{ n_{eff} }\)(for s = ec, eh, and eb andj = \(\parallel \text{ or } \perp \text{ or tot}\)) \(\beta_{s, j}\)(for s = ec, eh, and eb andj = \(\parallel \text{ or } \perp \text{ or tot}\)) \(s_{ec}\text{, }\kappa_{eh}\text{, and }\kappa_{eb}\) \(\mathcal{A}_{s}\)(for s = ec, eh, eb, and eff) \(\left( \tfrac{ T_{s} }{ T_{eff} } \right)_{j}\)(for s = ec, eh, and eband j = \(\parallel \text{ or } \perp \text{ or tot}\))

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