HR: 1400h
AN: SM33B-03    [Abstracts]
TI: The origin of Earth's foreshock waves
AU: * Enriquez-Rivera, O
EM: olienriquez@gmail.com
AF: Instituto de Geofísica, Universidad Nacional Autónoma de México, Mexico, D.F , Mexico
AU: Blanco-Cano, X
EM: xbc@geofisica.unam.mx
AF: Instituto de Geofísica, Universidad Nacional Autónoma de México, Mexico, D.F , Mexico
AU: Narita, Y
EM: y.narita@tu-bs.de
AF: Institute für Geophysik und extraterrestrische Physik, Technische Universität, Braunschweig, Germany
AU: Glassmeier, K H
EM: kh.glassmeier@tu-bs.de
AF: Institute für Geophysik und extraterrestrische Physik, Technische Universität, Braunschweig, Germany
AU: Russell, C
EM: ctrussel@igpp.ucla.edu
AF: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA , United States
AB: In this work we make use of kinetic theory to study the origin of low frequency compressive waves (shocklets) and high frequency waves (~ 1 Hz) observed within the Earth's foreshock using Cluster data. Empirical dispersion points obtained with the Wave Telescope Technique are presented and compared with kinetic dispersion relations for the ion/ion RH and LH resonant instabilities. We also performed a detailed characterization of the observed waves and present ion distributions associated with the waves. A very good agreement was found between the data and the theoretical curves for RH and LH observed shocklets, which probes that these RH (LH) compressive waves are generated by ion/ion RH (LH) kinetic instabilities. In contrast, 1 Hz waves' properties did not fit any instability due to local ions, this clearly supports previous hypothesis that upstream whistler modes are generated at planetary shocks.
DE: 2154 Planetary bow shocks
DE: 2159 Plasma waves and turbulence
DE: 2784 Solar wind/magnetosphere interactions
DE: 7829 Kinetic waves and instabilities
DE: 7867 Wave/particle interactions (2483, 6984)
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Joint Assembly