Super-Alfvénic propagation of substorm reconnection signatures and Poynting flux.
Phys Rev Lett
; 107(6): 065001, 2011 Aug 05.
Article
em En
| MEDLINE
| ID: mdl-21902330
ABSTRACT
The propagation of reconnection signatures and their associated energy are examined using kinetic particle-in-cell simulations and Cluster satellite observations. It is found that the quadrupolar out-of-plane magnetic field near the separatrices is associated with a kinetic Alfvén wave. For magnetotail parameters, the parallel propagation of this wave is super-Alfvénic (V(â¥) â¼ 1500-5500 km/s) and generates substantial Poynting flux (S â¼ 10(-5)-10(-4) W/m(2)) consistent with Cluster observations of magnetic reconnection. This Poynting flux substantially exceeds that due to frozen-in ion bulk outflows and is sufficient to generate white light aurora in Earth's ionosphere.
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01-internacional
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article