Implications of Kappa Suprathermal Halo of the Solar Wind Electrons

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00562178" target="_blank" >RIV/67985815:_____/22:00562178 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378289:_____/22:00566009

Výsledek na webu

<a href="https://hdl.handle.net/11104/0334750" target="_blank" >https://hdl.handle.net/11104/0334750</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fspas.2022.892236" target="_blank" >10.3389/fspas.2022.892236</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Implications of Kappa Suprathermal Halo of the Solar Wind Electrons

Popis výsledku v původním jazyce

Based on a large data set of electron velocity distribution functions measured in situ in the solar wind plasma, we have a statistical analysis of main non-thermal characteristics with respect to macroscopic properties of electrons, i.e., number density, bulk velocity, temperature and temperature anisotropy. The analysis indicates that the properties exhibit interdependence trends characterized by correlations between certain of these macroscopic parameters and the kappa exponent corresponding to the power law model function of the non-thermal population. The links between low kappa and low number densities confirm that Coulomb collisions can be quite ineffective even at low radial distances if the density of the plasma is sufficiently low. Moreover, non-thermal populations with lower values of κ parameter are also associated to higher temperature anisotropies, and to higher bulk velocity. Finally the κ parameter is discussed in terms of solar wind modelling with using the so-called exospheric approach.

Název v anglickém jazyce

Implications of Kappa Suprathermal Halo of the Solar Wind Electrons

Popis výsledku anglicky

Based on a large data set of electron velocity distribution functions measured in situ in the solar wind plasma, we have a statistical analysis of main non-thermal characteristics with respect to macroscopic properties of electrons, i.e., number density, bulk velocity, temperature and temperature anisotropy. The analysis indicates that the properties exhibit interdependence trends characterized by correlations between certain of these macroscopic parameters and the kappa exponent corresponding to the power law model function of the non-thermal population. The links between low kappa and low number densities confirm that Coulomb collisions can be quite ineffective even at low radial distances if the density of the plasma is sufficiently low. Moreover, non-thermal populations with lower values of κ parameter are also associated to higher temperature anisotropies, and to higher bulk velocity. Finally the κ parameter is discussed in terms of solar wind modelling with using the so-called exospheric approach.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Frontiers in Astronomy and Space Sciences

ISSN

2296-987X

e-ISSN

2296-987X

Svazek periodika

9

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

892236

Kód UT WoS článku

000891977500001

EID výsledku v databázi Scopus

2-s2.0-85133497363