Search Publications
Compressible turbulence with slow-mode waves observed in the bursty bulk flow of plasma sheet
Dunlop, M.; Cao, Jinbin; Fu, Huishan +2 more
In this paper, we report the evidence of compressible turbulence with slow-mode waves in a bursty bulk flow of plasma sheet. This compressible turbulence is characterized by a multiscale (1-60 s) anticorrelation between plasma density and magnetic field strength. Besides, the magnetic compressibility spectrum stays nearly constant at all the measu…
SAPS onset timing during substorms and the westward traveling surge
Mishin, Evgeny, V.
We present multispacecraft observations in the magnetosphere and conjugate ionosphere of the onset time of subauroral polarization streams (SAPS) and tens of keV ring current injections on the duskside in three individual substorms. This is probably the first unequivocal determination of the substorm SAPS onset timing. The time lag between the SAP…
Formation of layers of methane in the atmosphere of Mars after surface release
Daerden, F.; Neary, L.; Viscardy, S.
Simulations with a general circulation model for the atmosphere of Mars show that surface emissions of methane can result in a highly nonuniform vertical distribution throughout the atmosphere, including the formation of layers, during the first weeks after the release. The fate of the released methane is determined by the global circulation patte…
Constraints on an exosphere at Ceres from Hubble Space Telescope observations
Saur, Joachim; Roth, Lorenz; Feldman, Paul D. +5 more
We report far ultraviolet observations of Ceres obtained with the Cosmic Origin Spectrograph (COS) of the Hubble Space Telescope in the search for atomic emissions from an exosphere. The derived brightnesses at the oxygen lines at 1304 Å and 1356 Å are consistent with zero signals within the 1σ propagated statistical uncertainties. The OI 1304 Å b…
Dynamics of the flares in the active polar region of Jupiter
Badman, S. V.; Bonfond, B.; Gérard, J. -C. +2 more
The duskside of the polar region of Jupiter's UV aurorae, called the active region, sometimes exhibits quasiperiodic (QP) flares on timescales of 2-3 min. Based on Hubble Space Telescope Far-UV time-tag images, we show for the first time that the Northern Hemisphere also displays QP flares. The area covered by these flares can reach up to 2.4 × 10…
Quantitative prediction of type II solar radio emission from the Sun to 1 AU
Cairns, Iver H.; Schmidt, J. M.
Coronal mass ejections (CMEs) are frequently associated with shocks and type II solar radio bursts. Despite involving fundamental plasma physics and being the archetype for collective radio emission from shocks, type II bursts have resisted detailed explanation for over 60 years. Between 29 November and 1 December 2013 the two widely separated spa…
Hybrid simulation of Titan's interaction with the supersonic solar wind during Cassini's T96 flyby
Simon, Sven; Motschmann, Uwe; Neubauer, Fritz M. +5 more
By applying a hybrid (kinetic ions and fluid electrons) simulation code, we study the plasma environment of Saturn's largest moon Titan during Cassini's T96 flyby on 1 December 2013. The T96 encounter marks the only observed event of the entire Cassini mission where Titan was located in the supersonic solar wind in front of Saturn's bow shock. Our…
Wave telescope technique for MMS magnetometer
Russell, C. T.; Glassmeier, K. -H.; Anderson, B. J. +18 more
Multipoint measurements are a powerful method in studying wavefields in space plasmas. The wave telescope technique is tested against magnetic field fluctuations in the terrestrial magnetosheath measured by the four Magnetospheric Multiscale (MMS) spacecraft on a spatial scale of about 20 km. The dispersion relation diagram and the wave vector dis…
On the origin of the ionosphere at the Moon using results from Chandrayaan-1 S band radio occultation experiment and a photochemical model
Choudhary, R. K.; Bhardwaj, Anil; Dhanya, M. B. +2 more
The origin of the Moon's ionosphere has been explored using Chandrayaan-1 radio occultation (RO) measurements and a photochemical model. The electron density near the Moon's surface, obtained on 31 July 2009 (∼300 cm-3), is compared with results from a model which includes production and recombination of 16 ions, solar wind proton charg…
Three-dimensional development of front region of plasma jets generated by magnetic reconnection
Nakamura, R.; Baumjohann, W.; Shinohara, I. +2 more
A three-dimensional fully kinetic particle-in-cell simulation of antiparallel magnetic reconnection is performed to investigate the three-dimensional development of reconnection jet fronts treating three instabilities: the lower hybrid drift instability (LHDI), the ballooning/interchange instability (BICI), and the ion-ion kink instability. Suffic…