Search Publications
Nonstorm time scattering of ring current protons by electromagnetic ion cyclotron waves
Xiao, Fuliang; Yang, Chang; Zhou, Qinghua +4 more
We report correlated observation of enhanced electromagnetic ion cyclotron (EMIC) waves and dynamic evolution of ring current proton flux collected by Cluster satellite near the location L = 4.5 during March 26-27, 2003, a nonstorm period (Dst> -10). Energetic (5-30 keV) proton fluxes are found to drop rapidly (e.g., a half hour) at …
Enhanced atmospheric oxygen outflow on Earth and Mars driven by a corotating interaction region
Barabash, S.; Lundin, R.; Woch, J. +10 more
Solar wind controls nonthermal escape of planetary atmospheric volatiles, regardless of the strength of planetary magnetic fields. For both Earth with a strong dipole and Mars with weak remnant fields, the oxygen ion (O+) outflow has been separately found to be enhanced during corotating interaction region (CIR) passage. Here we compare…
Dayside magnetic topology at the Earth's magnetopause for northward IMF
Lavraud, B.; Fuselier, S. A.; Trattner, K. J. +1 more
When the Interplanetary Magnetic Field is northward, magnetic reconnection occurs at the Earth's high latitude magnetopause in regions poleward of the Earth's magnetospheric cusps. Observations at the high latitude magnetopause appear to support reconnection poleward of both northern and southern hemisphere cusps, forming closed field lines in the…
Hot flow anomalies at Venus
Coates, A. J.; Barabash, S.; Zhang, T. L. +8 more
We present a multi-instrument study of a hot flow anomaly (HFA) observed by the Venus Express spacecraft in the Venusian foreshock, on 22 March 2008, incorporating both Venus Express Magnetometer and Analyzer of Space Plasmas and Energetic Atoms (ASPERA) plasma observations. Centered on an interplanetary magnetic field discontinuity with inward co…
The discrepancy in solar EUV-proxy correlations on solar cycle and solar rotation timescales and its manifestation in the ionosphere
Liu, Libo; Wan, Weixing; Chen, Yiding
This study investigates the correlations between SOHO/Solar EUV Monitor 26-34 nm EUV and the F10.7 and Mg II proxies on solar cycle (long-term) and solar rotation (short-term) timescales. The long-term components of EUV and proxies are well correlated, and the general relation between them can be captured by the 81 day averaged EUV and …
Hall magnetohydrodynamic effects for three-dimensional magnetic reconnection with finite width along the direction of the current
Nakamura, R.; Kubota, Y.; Nakamura, T. K. M. +2 more
We performed three-dimensional Hall magnetohydrodynamic (MHD) simulations of magnetic reconnection with finite width along the direction perpendicular to the antiparallel magnetic field (i.e., the direction of the electric current). Previous similar simulations including the Hall term have shown that the localized reconnection region itself can br…
Adiabatic electron heating in the magnetotail current sheet: Cluster observations and analytical models
Petrukovich, A. A.; Zelenyi, L. M.; Nakamura, R. +1 more
We consider the electron distribution in current sheets observed by Cluster mission in the Earth magnetotail. We use the statistics of 70 fast (less than 20 minutes) and 12 slow (more than one hour) crossings of horizontal current sheets. We demonstrate that for both types electron temperature decreases with increase of magnetic field ∣Bx
Analysis of Cassini magnetic field observations over the poles of Rhea
Dougherty, Michele K.; Saur, Joachim; Kriegel, Hendrik +5 more
We analyze Cassini magnetic field observations from the only two polar flybys of Saturn's largest icy satellite Rhea (R2 on 02 March 2010 and R3 on 11 January 2011) which are scheduled between Saturn Orbit Insertion and the end of the mission in 2017. For the interpretation of these data, we apply estimations from simple analytical models as well …
Profile of strong magnetic field By component in magnetotail current sheets
Petrukovich, A. A.; Zhang, T. L.; Lucek, E. +8 more
The strong magnetic field By component (in GSM coordinates) has been increasingly noticed to play an important role in the dynamics of tail current sheet (CS). The distribution profile of strong By components in the tail CS (i.e., those with guide field), however, is not well known. In the present work, by using the simultane…
Characteristics of precipitating energetic ions/electrons associated with the wave-particle interaction in the plasmaspheric plume
Yuan, Zhigang; Deng, Xiaohua; Wang, Dedong +5 more
In this paper, we present characteristics of precipitating energetic ions/electrons associated with the wave-particle interaction in the plasmaspheric plume during the geomagnetic storm on July 18, 2005 with observations of the NOAA15 NOAA16, IMAGE satellites and Finnish network of search coil magnetometers. Conjugate observations of the NOAA15 sa…