The Rapid Variability of Electric Field Waves within and near interplanetary shock ramps: STEREO Observations

التفاصيل البيبلوغرافية
العنوان: The Rapid Variability of Electric Field Waves within and near interplanetary shock ramps: STEREO Observations
المؤلفون: Cohen, Z. A., Cattell, C. A., Breneman, A. W., Davis, L., Grul, P., Kersten, K., Wilson III, L. B., Wygant, J. R.
سنة النشر: 2019
المجموعة: Physics (Other)
مصطلحات موضوعية: Physics - Space Physics
الوصف: We present STEREO observations within 1500 proton gyroradii of 12 interplanetary shocks, with long-duration burst mode electric field acquisition by S/WAVES enabling observation of the evolution of waves throughout the entire ramp of interplanetary shocks. The shocks are low Mach number ($M_{f} \sim $1--5), quasi-perpendicular ($\theta_{Bn} \geq 45^{\circ}$), with beta ($\beta$) $\sim $0.2--1.8. High variability in frequency, amplitude, and wave mode is observed upstream, downstream, and in shock ramps. Observations in every region include ion acoustic-like waves, electron cyclotron drift instability driven waves, electrostatic solitary waves, and high frequency whistler mode waves. We also show for the first time the existence of "dispersive" electrostatic waves with frequencies in the ion acoustic range and the first observations of electron cyclotron drift instability (ECDI) driven waves at interplanetary shocks. Large amplitude waves are bursty and seen in all three regions with amplitudes from $\sim$5 to $>$ 200 mV/m. All wave modes are more commonly observed downstream of the shocks than upstream of them, usually within $\sim$ 63000 km ($\sim 1500 \rho_{gi}$) of the ramp.
نوع الوثيقة: Working Paper
DOI: 10.3847/1538-4357/abbeec
URL الوصول: http://arxiv.org/abs/1909.08176
رقم الأكسشن: edsarx.1909.08176
قاعدة البيانات: arXiv
الوصف
DOI:10.3847/1538-4357/abbeec