On the Kinetic Theory of Subauroral Arcs
On the Kinetic Theory of Subauroral Arcs
复制标题
论亚极光弧的动力学理论
DOI:
10.1029/2022ja030667
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Streltsov, Anatoly
中科院分区:
文献类型:
--
作者:
Mishin, Evgeny;Streltsov, Anatoly
We report on a novel scenario of subauroral arcs within strong subauroral ion drifts (SAID)‐STEVE and Picket Fence. Their explanation requires a local source of low‐energy,ε< 18.75 eV, suprathermal electrons, and N2vibrational and electronic excitation below ∼270 km. We show that the ionospheric feedback instability in strong SAID flows with depleted density troughs generates intense, small‐scale field‐aligned currents and parallel electric fields below the F2peak. With these fields, we employed a rigorous numerical solution of the Boltzmann kinetic equation for the distribution of ionospheric electrons and determined the power going to excitation and ionization of neutral gas (the energy balance). The obtained suprathermal electron population and energy balance at altitudes of ∼130–140 km are just what is necessary for Picket Fence. Concerning STEVE, the kinetic theory predictions are in a good qualitative agreement with its basic features, such as the enhanced continuum emissions. Besides, the theory predicts that subauroral arcs might have the transient phase with typical aurora‐like emissions that fade out afterward.
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DOI:
10.1029/2020ja027782
发表时间:
2020-08
期刊:
Journal of Geophysical Research: Space Physics
影响因子:
--
作者:
Y. Nishimura;J. Yang;J. Weygand;W. Wang;B. Kosar;E. Donovan;V. Angelopoulos;L. Paxton;N. Nishitani
通讯作者:
Y. Nishimura;J. Yang;J. Weygand;W. Wang;B. Kosar;E. Donovan;V. Angelopoulos;L. Paxton;N. Nishitani
DOI:
10.1016/s1364-6826(03)00136-6
发表时间:
2003
影响因子:
1.9
作者:
J. Titheridge
通讯作者:
J. Titheridge
影响因子:
4.6
作者:
G. Chanteur;J. Adam;R. Pellat;A. S. Volokhitin
通讯作者:
A. S. Volokhitin
影响因子:
5.2
作者:
W. Archer;J. St.‐Maurice;B. Gallardo‐Lacourt;G. W. Perry;Christopher Cully;Eric Donovan;D. Gillies;R. Downie;J. Smith;D. Eurich
通讯作者:
D. Eurich
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
A. Galeev;R. Sagdeev
通讯作者:
R. Sagdeev