Skip to Main content Skip to Navigation
Conference papers

Self-Reformation of the Quasi-Perpendicular Shock: CLUSTER Observations

Abstract : Among several mechanisms issued from simulation and theoretical studies proposed to account for the nonstationarity of quasi-perpendicular supercritical shocks, one process—the so-called self-reformation—driven by the accumulation of reflected ions in the foot has been intensively analyzed with simulations. Present results based on experimental CLUSTER mission clearly evidence signatures of this self-reformation process for the terrestrial bow shock. The study based on magnetic field measurements includes two parts: (i) a detailed analysis of one typical shock crossing for almost perpendicular shock directions where the risk of pollution by other nonstationarity mechanisms is minimal. A special attention is drawn on appropriate treatment of data to avoid any wrong interpretation. One key result is that the ramp width can reach a very narrow value covering a few electron inertial lengths only; (ii) a statistical analysis allows relating the signatures of this nonstationarity with different plasma conditions and shock regimes. Present results are discussed in comparison with previous simulation works.
Complete list of metadata
Contributor : Catherine Cardon Connect in order to contact the contributor
Submitted on : Monday, April 19, 2010 - 6:26:30 PM
Last modification on : Tuesday, January 18, 2022 - 2:26:04 PM



C. Mazelle, Bertrand Lembège, A. Morgenthaler, K. Meziane, T. S. Horbury, et al.. Self-Reformation of the Quasi-Perpendicular Shock: CLUSTER Observations. Twelfth International Solar Wind Conference, AIP Conf. Proc., Vol. 1216, Jun 2009, Saint-Malo, France. pp.471-474, ⟨10.1063/1.3395905⟩. ⟨hal-00474373⟩



Les métriques sont temporairement indisponibles