Proton heating by pick-up ion driven cyclotron waves in the outer heliosphere: Hybrid expanding box simulations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F16%3A00472216" target="_blank" >RIV/68378289:_____/16:00472216 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985815:_____/16:00471449

Výsledek na webu

<a href="http://dx.doi.org/10.3847/0004-637X/832/1/32" target="_blank" >http://dx.doi.org/10.3847/0004-637X/832/1/32</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/0004-637X/832/1/32" target="_blank" >10.3847/0004-637X/832/1/32</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Proton heating by pick-up ion driven cyclotron waves in the outer heliosphere: Hybrid expanding box simulations

Popis výsledku v původním jazyce

Using a one-dimensional hybrid expanding box model, we investigate properties of the solar wind in the outer heliosphere. We assume a proton-electron plasma with a strictly transverse ambient magnetic field and, aside from the expansion, we take into account the influence of a continuous injection of cold pick-up protons through the charge-exchange process between the solar wind protons and hydrogen of interstellar origin. The injected cold pick-up protons form a ring distribution function, which rapidly becomes unstable, and generate Alfven cyclotron waves. The Alfvwn cyclotron waves scatter pick-up protons to a spherical shell distribution function that thickens over that time owing to the expansion-driven cooling. The Alfvwn cyclotron waves heat solar wind protons in the perpendicular direction (with respect to the ambient magnetic field) through cyclotron resonance. At later times, the Alfven cyclotron waves become parametrically unstable and the generated ion-acoustic waves heat protons in the parallel direction through Landau resonance. The resulting heating of the solar wind protons is efficient on the expansion timescale.

Název v anglickém jazyce

Proton heating by pick-up ion driven cyclotron waves in the outer heliosphere: Hybrid expanding box simulations

Popis výsledku anglicky

Using a one-dimensional hybrid expanding box model, we investigate properties of the solar wind in the outer heliosphere. We assume a proton-electron plasma with a strictly transverse ambient magnetic field and, aside from the expansion, we take into account the influence of a continuous injection of cold pick-up protons through the charge-exchange process between the solar wind protons and hydrogen of interstellar origin. The injected cold pick-up protons form a ring distribution function, which rapidly becomes unstable, and generate Alfven cyclotron waves. The Alfvwn cyclotron waves scatter pick-up protons to a spherical shell distribution function that thickens over that time owing to the expansion-driven cooling. The Alfvwn cyclotron waves heat solar wind protons in the perpendicular direction (with respect to the ambient magnetic field) through cyclotron resonance. At later times, the Alfven cyclotron waves become parametrically unstable and the generated ion-acoustic waves heat protons in the parallel direction through Landau resonance. The resulting heating of the solar wind protons is efficient on the expansion timescale.

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

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

—

Svazek periodika

832

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

—

Kód UT WoS článku

000388603600014

EID výsledku v databázi Scopus

2-s2.0-84996490263