Proton fire hose instabilities in the expanding solar wind

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00484366" target="_blank" >RIV/67985815:_____/17:00484366 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378289:_____/17:00478275

Výsledek na webu

<a href="http://dx.doi.org/10.1017/S0022377817000071" target="_blank" >http://dx.doi.org/10.1017/S0022377817000071</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/S0022377817000071" target="_blank" >10.1017/S0022377817000071</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Proton fire hose instabilities in the expanding solar wind

Popis výsledku v původním jazyce

Using two-dimensional hybrid expanding box simulations we study the competition between the continuously driven parallel proton temperature anisotropy and fire hose instabilities in collisionless homogeneous plasmas. For a quasi-radial ambient magnetic field the expansion drives T-p parallel to > T-p perpendicular to and the system becomes eventually unstable with respect to the dominant parallel fire hose instability. This instability is generally unable to counteract the induced anisotropization and the system typically becomes unstable with respect to the oblique fire hose instability later on. The oblique instability efficiently reduces the anisotropy and the system rapidly stabilizes, while a significant part of the generated electromagnetic fluctuations is damped to protons. As long as the magnetic field is in the quasi-radial direction, this evolution repeats itself and the electromagnetic fluctuations accumulate. For a sufficiently oblique magnetic field the expansion drives T-p vertical bar > T-p parallel to and brings the system to the stable region with respect to the fire hose instabilities.

Název v anglickém jazyce

Proton fire hose instabilities in the expanding solar wind

Popis výsledku anglicky

Using two-dimensional hybrid expanding box simulations we study the competition between the continuously driven parallel proton temperature anisotropy and fire hose instabilities in collisionless homogeneous plasmas. For a quasi-radial ambient magnetic field the expansion drives T-p parallel to > T-p perpendicular to and the system becomes eventually unstable with respect to the dominant parallel fire hose instability. This instability is generally unable to counteract the induced anisotropization and the system typically becomes unstable with respect to the oblique fire hose instability later on. The oblique instability efficiently reduces the anisotropy and the system rapidly stabilizes, while a significant part of the generated electromagnetic fluctuations is damped to protons. As long as the magnetic field is in the quasi-radial direction, this evolution repeats itself and the electromagnetic fluctuations accumulate. For a sufficiently oblique magnetic field the expansion drives T-p vertical bar > T-p parallel to and brings the system to the stable region with respect to the fire hose instabilities.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA15-10057S" target="_blank" >GA15-10057S: Ionty ve slunečním větru: korelace, omezení a kausalita</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Plasma Physics

ISSN

0022-3778

e-ISSN

—

Svazek periodika

83

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

"705830105/1"-"705830105/14"

Kód UT WoS článku

000396123100015

EID výsledku v databázi Scopus

2-s2.0-85017297538&