Počet záznamů: 1
Timing mirror structures observed by Cluster with a magnetosheath flow model
0368231 - UFA-U 2012 RIV DE eng J - Článek v odborném periodiku
Génot, V. - Broussillou, L. - Budnik, E. - Hellinger, Petr - Trávníček, Pavel M. - Lucek, E. - Dandouras, I.
Timing mirror structures observed by Cluster with a magnetosheath flow model.
Annales Geophysicae. Roč. 29, č. 10 (2011), s. 1849-1860 ISSN 0992-7689
Výzkumný záměr: CEZ:AV0Z30420517; CEZ:AV0Z10030501
Klíčová slova: Magnetospheric physics * Magnetosheath * Space plasma physics * Kinetic and MHD theory * Waves and instabilities
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 1.842, rok: 2011
The evolution of structures associated with mirror modes during their flow in the Earth's magnetosheath is studied. The fact that the related magnetic fluctuations can take distinct shapes, from deep holes to high peaks, has been assessed in previous works on the observational, modeling and numerical points of view. In this paper we present an analytical model for the flow lines and velocity magnitude inside the magnetosheath. This model is used to interpret almost 10 years of Cluster observations of mirror structures: by back tracking each isolated observation to the shock, the "age", or flow time, of these structures is determined together with the geometry of the shock. Using this flow time the evolutionary path of the structures may be studied with respect to different quantities: the distance to mirror threshold, the amplitude of mirror fluctuations and the skewness of the magnetic amplitude distribution as a marker of the shape of the structures.
Trvalý link: http://hdl.handle.net/11104/0202629