Turbulent dynamos and magnetic helicity

Hantao Ji

doi:10.1103/PhysRevLett.83.3198

Turbulent dynamos and magnetic helicity

Hantao Ji

Astrophysical Sciences

Research output: Contribution to journal › Article › peer-review

58 Scopus citations

Abstract

It is shown that the turbulent-dynamo α effect converts magnetic helicity from the turbulent field to the mean field when the turbulence is electromagnetic, while the magnetic helicity of the mean field is transported across space when the turbulence is electrostatic or due to the electron diamagnetic effect. In all cases, however, the dynamo effect strictly conserves the total helicity except for resistive effects and a small battery effect. Implications for astrophysical situations, especially for the solar dynamo, are discussed. 1999

Original language	English (US)
Pages (from-to)	3198-3201
Number of pages	4
Journal	Physical review letters
Volume	83
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.83.3198
State	Published - Oct 18 1999

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Access to Document

10.1103/PhysRevLett.83.3198

Fingerprint Dive into the research topics of 'Turbulent dynamos and magnetic helicity'. Together they form a unique fingerprint.

Cite this

@article{74fe3eade95b4a8aaf7f25ddb166d24c,

title = "Turbulent dynamos and magnetic helicity",

abstract = "It is shown that the turbulent-dynamo α effect converts magnetic helicity from the turbulent field to the mean field when the turbulence is electromagnetic, while the magnetic helicity of the mean field is transported across space when the turbulence is electrostatic or due to the electron diamagnetic effect. In all cases, however, the dynamo effect strictly conserves the total helicity except for resistive effects and a small battery effect. Implications for astrophysical situations, especially for the solar dynamo, are discussed. 1999",

author = "Hantao Ji",

year = "1999",

month = oct,

day = "18",

doi = "10.1103/PhysRevLett.83.3198",

language = "English (US)",

volume = "83",

pages = "3198--3201",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "16",

}

TY - JOUR

T1 - Turbulent dynamos and magnetic helicity

AU - Ji, Hantao

PY - 1999/10/18

Y1 - 1999/10/18

N2 - It is shown that the turbulent-dynamo α effect converts magnetic helicity from the turbulent field to the mean field when the turbulence is electromagnetic, while the magnetic helicity of the mean field is transported across space when the turbulence is electrostatic or due to the electron diamagnetic effect. In all cases, however, the dynamo effect strictly conserves the total helicity except for resistive effects and a small battery effect. Implications for astrophysical situations, especially for the solar dynamo, are discussed. 1999

AB - It is shown that the turbulent-dynamo α effect converts magnetic helicity from the turbulent field to the mean field when the turbulence is electromagnetic, while the magnetic helicity of the mean field is transported across space when the turbulence is electrostatic or due to the electron diamagnetic effect. In all cases, however, the dynamo effect strictly conserves the total helicity except for resistive effects and a small battery effect. Implications for astrophysical situations, especially for the solar dynamo, are discussed. 1999

UR - http://www.scopus.com/inward/record.url?scp=0001567009&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001567009&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.83.3198

DO - 10.1103/PhysRevLett.83.3198

M3 - Article

AN - SCOPUS:0001567009

VL - 83

SP - 3198

EP - 3201

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 16

ER -