TY - JOUR
T1 - Magnetogenesis by Wave-driven Momentum Exchange
AU - Ochs, Ian E.
AU - Fisch, Nathaniel J.
N1 - Publisher Copyright:
© 2020. The American Astronomical Society. All rights reserved..
PY - 2020/12/10
Y1 - 2020/12/10
N2 - When multiple species interact with an electrostatic ion acoustic wave, they can exchange momentum, despite the lack of momentum in the field itself. The resulting force on the electrons can have a curl, and thus give rise to compensating electric fields with curl on magnetohydrodynamic timescales. As a result, a magnetic field can be generated. Surprisingly, in some astrophysical settings, this mechanism can seed magnetic fields with growth rates even larger than through the traditional Biermann battery.
AB - When multiple species interact with an electrostatic ion acoustic wave, they can exchange momentum, despite the lack of momentum in the field itself. The resulting force on the electrons can have a curl, and thus give rise to compensating electric fields with curl on magnetohydrodynamic timescales. As a result, a magnetic field can be generated. Surprisingly, in some astrophysical settings, this mechanism can seed magnetic fields with growth rates even larger than through the traditional Biermann battery.
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U2 - 10.3847/1538-4357/abc4e8
DO - 10.3847/1538-4357/abc4e8
M3 - Article
AN - SCOPUS:85098139038
SN - 0004-637X
VL - 905
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 13
ER -