We discuss one‐dimensional electromagnetic full particle simulations of quasi‐perpendicular collisionless shocks with physical mass ratio in the context of recent Cluster bow shock measurements. The density ramp scale in units of the ion inertial length obtained from simulations of high ion beta shocks (βi ≈ 1) does not increase with Mach number, contrary to what has been reported from Earth’s bow shock measurements. Several possibilities are offered which could explain this discrepancy. In low beta shocks the modified two‐stream instability is important in the foot of the shock and can lead to large density and electric field spikes. It is suggested that recent Cluster observations of short scale electric field spikes at the quasi‐perpendicular Earth’s bow shock can be explained in terms of the modified two‐stream instability.
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1 August 2005
THE PHYSICS OF COLLISIONLESS SHOCKS: 4th Annual IGPP International Astrophysics Conference
26 February-3 March 2005
Palm Springs, California (USA)
Research Article|
August 01 2005
On Kinetic Structure of Quasi‐Perpendicular Collisionless Shocks
Manfred Scholer;
Manfred Scholer
*Max‐Planck‐Institut für extraterrestrische Physik, Garching, Germany
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Shuichi Matsukiyo
Shuichi Matsukiyo
†Earth System Science and Technology, Kyushu University, Fukuoka, Japan
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AIP Conf. Proc. 781, 22–26 (2005)
Citation
Manfred Scholer, Shuichi Matsukiyo; On Kinetic Structure of Quasi‐Perpendicular Collisionless Shocks. AIP Conf. Proc. 1 August 2005; 781 (1): 22–26. https://doi.org/10.1063/1.2032669
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