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Gyrophase bunched ions in the plasma sheet
Wang, Zhiqiang; Zhai, Hao; Gao, Zhuxiu +1 more
Gyrophase bunched ions were first detected in the upstream region of the Earth's bow shock in the early 1980s which is formed by the microphysical process associated with reflected solar wind ions at the bow shock. Inside the magnetosphere, the results of computer simulations demonstrated that nonlinear wave-particle interaction can also result in…
Properties of the Tycho-2 catalogue from Gaia data release
Tsvetkov, A. S.; Vityazev, V. V.; Petrov, S. D. +2 more
Based on the measurements performed in the first 14 months of Gaia operation, we have solved the problem of obtaining the systematic differences between the stellar positions and proper motions of the TGAS (Tycho-Gaia Astrometric Solution) and Tycho-2 catalogues. By dividing the common stars from the TGAS and Tycho-2 catalogues into three G-magnit…
Electron temperature anisotropy associated to field-aligned currents in the Earth's magnetosphere inferred from Rosetta MIP-RPC observations during 2009 flyby
Henri, P.; Hamelin, M.; Béghin, C. +3 more
A new approach is proposed for data interpretation of the Mutual Impedance Probe (MIP) instrument from the Rosetta Plasma Consortium (RPC) during the 2009 Earth's flyby gravity assist through the magnetosphere, from dusk to dawn regions. The spacecraft trajectory of ±8 RE (Earth's radius) was crossing several structures of field-aligned…
Neoproterozoic Rosetta Gabbro from northernmost Arabian-Nubian Shield, south Jordan: Geochemistry and petrogenesis
Miller, Nathan; Jarrar, Ghaleb H.; Stern, Robert J. +6 more
An Ediacaran mafic intrusion of south Jordan is a distinctive appinitic igneous rock with a possibly unique texture, characterized by spherical clots up to 40 mm in diameter composed of amphibole cores from which plagioclase euhedra radiate; we call it the Rosetta Gabbro. It is exposed as a small (ca. 750 m2) outcrop in the Neoproterozo…
Vertical distribution and kinematics of protoplanetary nebulae in the galaxy
Bobylev, V. V.; Bajkova, A. T.
The catalogue of protoplanetary nebulae by Vickers et al. has been supplemented with the line-of-sight velocities and proper motions of their central stars from the literature. Based on an exponential density distribution, we have estimated the vertical scale height from objects with an age less than 3 Gyr belonging to the Galactic thin disk (lumi…
Electron acceleration in the near-Earth magnetotail: test particle calculations in electromagnetic fields from two-dimensional hybrid simulations
Wu, Mingyu; Du, Aimin; Guo, Zhifang
Electron acceleration in the near-Earth magnetotail during the substorm period is still an unresolved question. In this paper, by tracing electron trajectories in the dynamically evolving electromagnetic fields obtained from a two-dimensional (2D) global hybrid simulation, we investigate electron acceleration in the near-Earth magnetotail during d…
The CO2 Cycle
Byrne, Shane; Michaels, Timothy I.; Forget, François +3 more
The Radio and X-ray Mode-Switching Pulsar PSR B0943+10
Mereghetti, Sandro; Rigoselli, Michela
Observations obtained in the last years challenged the widespread notion that rotation-powered neutron stars are steady X-ray emitters. Besides a few allegedly rotation-powered neutron stars that showed 'magnetar-like' variability, a particularly interesting case is that of PSR B0943+10. Recent observations have shown that this pulsar, well studie…
A Librational Model for the Propeller Blériot in the Saturnian Ring System
Seiß, M.; Spahn, F.; Hoffmann, H. +2 more
The reconstruction of the orbital evolution of the propeller structure Blériot orbiting in Saturn’s A ring from recurrent observations in Cassini ISS images yielded a considerable offset motion from the expected Keplerian orbit. This offset motion can be composed by three sinusoidal harmonics with amplitudes and periods of 1845, 152, 58 km and 11.…
Atomic diffusion in the atmosphere of Feige 86
Németh, Péter
We have revisited the ultraviolet and optical spectra of the blue horizontal branch star Feige 86. The new analysis finds the star cooler and more compact than previously determined. The IUE spectrum of Feige 86 holds numerous unidentified spectral lines of heavy metals, indicating efficient atomic diffusion in the atmosphere. Because diffusion pl…