Self-consistent stationary MHD shear flows in the solar atmosphere as electric field generators

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F14%3A00434761" target="_blank" >RIV/67985815:_____/14:00434761 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1051/0004-6361/201423819" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201423819</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201423819" target="_blank" >10.1051/0004-6361/201423819</a>

Result language

angličtina

Original language name

Self-consistent stationary MHD shear flows in the solar atmosphere as electric field generators

Original language description

Within a physically simplified, but exact mathematical model, we study the electric currents and corresponding electric fields generated by shear flows. Methods: Starting from exact and analytically calculated magnetic potential fields, we solved the nonlinear MHD equations self-consistently. By applying a magnetic shear flow and assuming a nonideal MHD environment, we calculated an electric field via Faraday's law. The formal solution for the electromagnetic field allowed us to compute an expression ofan effective resistivity similar to the collisionless Speiser resistivity. We find that the electric field can be highly spatially structured, or in other words, filamented. The electric field component parallel to the magnetic field is the dominant component and is high where the resistivity has a maximum. The electric field is a potential field, therefore, the highest energy gain of the particles can be directly derived from the corresponding voltage. In our example of a coronal post-

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

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

Name of the periodical

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

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Volume of the periodical

569

Issue of the periodical within the volume

September

Country of publishing house

FR - FRANCE

Number of pages

10

Pages from-to

"A44/1"-"A44/10"

UT code for WoS article

000343092100065

EID of the result in the Scopus database

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