Search Publications
Large amplitude nonlinear waves in Venus magnetosheath
Zhang, T. L.; Gedalin, M.; Balikhin, M. +1 more
Large-amplitude variations of the magnetic field in the Venusian magnetosheath are observed when the distance between the bow shock and the magnetic pileup boundary is small, of the order of the ion convective gyroradius. It is proposed that these oscillations are nonlinear standing waves. A theoretical model is developed within one-dimensional tw…
Intensities of the Venusian N2 electron-impact excited dayglow emissions
Fox, Jane L.; F. Hać, Nicholas E.
Dayglow emissions are signatures of both the energy deposition into an atmosphere and the abundances of the species from which they arise. The first N2 dayglow emissions from Mars, the (0,5) and (0,6) bands of the N2 Vegard-Kaplan band system, were detected by the Spectroscopy for Investigations of the Characteristics of the …
Correction to "Variation of the Martian ionospheric electron density from Mars Express radar soundings"
Gurnett, D. A.; Morgan, D. D.; Plaut, J. J. +3 more
Magnetic field topology of the plasma sheet boundary layer
Nakamura, R.; Baumjohann, W.; Teh, W. -L.
magnetic field topology of the plasma sheet boundary layer (PSBL) and its neighborhood is examined using a steady, two-dimensional (2-D), ideal MHD reconstruction method. We study four PSBL crossings, from the lobe toward the plasma sheet and back into the lobe, by the Cluster spacecraft in the Earth's magnetotail around (x, y, z) = (-17.3, 4.3, -…
Ulysses observations of Jupiter's 10 h modulation in interplanetary space in 2004
Heber, B.; Kopp, A.; Dunzlaff, P.
Since the Pioneer 10/11 mission, Jupiter is known as a dominant and almost constant source of MeV electrons in the inner heliosphere. An interesting feature of the Jovian electron source is the fact that Jupiter's rotation period (~10 h) can frequently be recovered in the energy spectrum of Jovian electrons in the vicinity of the planet. However, …
Global model of lower band and upper band chorus from multiple satellite observations
Meredith, Nigel P.; Horne, Richard B.; Thorne, Richard M. +4 more
Gyroresonant wave particle interactions with whistler mode chorus play a fundamental role in the dynamics of the Earth's radiation belts and inner magnetosphere, affecting both the acceleration and loss of radiation belt electrons. Knowledge of the variability of chorus wave power as a function of both spatial location and geomagnetic activity, re…
Pitch angle distribution of suprathermal electrons behind dipolarization fronts: A statistical overview
Daly, P. W.; André, M.; Vaivads, A. +5 more
We examine the pitch angle distribution (PAD) of suprathermal electrons (>40 keV) inside the flux pileup regions (FPRs) that are located behind the dipolarization fronts (DFs), in order to better understand the particle energization mechanisms operating therein. The 303 earthward-propagating DFs observed during 9 years (2001-2009) by Cluster 1 …
Nonlinear pitch angle scattering of relativistic electrons by EMIC waves in the inner magnetosphere
Omura, Yoshiharu; Zhao, Qinghua
We derive the second-order resonance condition for interaction between a relativistic electron and a coherent Electromagnetic Ion Cyclotron (EMIC) wave with a variable frequency. We perform test particle simulations of relativistic electrons interacting with EMIC waves with a fixed frequency and a rising-tone frequency such as EMIC triggered emiss…
Magnetospheric configuration and dynamics of Saturn's magnetosphere: A global MHD simulation
Hansen, Kenneth C.; Gombosi, Tamas I.; Kivelson, Margaret G. +4 more
We investigate the solar wind interaction with Saturn's magnetosphere by using a global magnetohydrodynamic simulation driven by an idealized time-varying solar wind input that includes features of Corotating Interaction Regions typically seen at Saturn. Our model results indicate that the compressibility of Saturn's magnetosphere is intermediate …
Remote and in situ observations of an unusual Earth-directed coronal mass ejection from multiple viewpoints
Anderson, B. J.; Szabo, A.; Nieves-Chinchilla, T. +5 more
During June 16-21, 2010, an Earth-directed coronal mass ejection (CME) event was observed by instruments onboard STEREO, SOHO, MESSENGER and Wind. This event was the first direct detection of a rotating CME in the middle and outer corona. Here, we carry out a comprehensive analysis of the evolution of the CME in the interplanetary medium comparing…