Proton Energization by Phase Steepening of Parallel-propagating Alfvenic Fluctuations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00548004" target="_blank" >RIV/67985815:_____/21:00548004 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378289:_____/21:00543711

Výsledek na webu

<a href="https://doi.org/10.3847/2041-8213/ac097b" target="_blank" >https://doi.org/10.3847/2041-8213/ac097b</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/2041-8213/ac097b" target="_blank" >10.3847/2041-8213/ac097b</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Proton Energization by Phase Steepening of Parallel-propagating Alfvenic Fluctuations

Popis výsledku v původním jazyce

Proton energization at magnetic discontinuities generated by phase-steepened fronts of parallel-propagating, large-amplitude Alfvenic fluctuation is studied using hybrid simulations. We find that dispersive effects lead to the collapse of the wave via phase steepening and the subsequent generation of compressible fluctuations that mediate an efficient local energy transfer from the wave to the protons. Proton scattering at the steepened edges causes nonadiabatic proton perpendicular heating. Furthermore, the parallel electric field at the propagating fronts mediates the acceleration of protons along the mean field. A steady-state is achieved where the proton distribution function displays a field-aligned beam at the Alfven speed, and compressible fluctuations are largely damped. We discuss the implications of our results in the context of Alfvenic solar wind.

Název v anglickém jazyce

Proton Energization by Phase Steepening of Parallel-propagating Alfvenic Fluctuations

Popis výsledku anglicky

Proton energization at magnetic discontinuities generated by phase-steepened fronts of parallel-propagating, large-amplitude Alfvenic fluctuation is studied using hybrid simulations. We find that dispersive effects lead to the collapse of the wave via phase steepening and the subsequent generation of compressible fluctuations that mediate an efficient local energy transfer from the wave to the protons. Proton scattering at the steepened edges causes nonadiabatic proton perpendicular heating. Furthermore, the parallel electric field at the propagating fronts mediates the acceleration of protons along the mean field. A steady-state is achieved where the proton distribution function displays a field-aligned beam at the Alfven speed, and compressible fluctuations are largely damped. We discuss the implications of our results in the context of Alfvenic solar wind.

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

2021

Kód důvěrnosti údajů

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

Název periodika

Astrophysical Journal Letters

ISSN

2041-8205

e-ISSN

2041-8213

Svazek periodika

914

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

L36

Kód UT WoS článku

000664294700001

EID výsledku v databázi Scopus

2-s2.0-85109138683