Search Publications
IMF dependence of the azimuthal direction of earthward magnetotail fast flows
Nilsson, H.; Hamrin, M.; Norqvist, P. +2 more
Cluster magnetotail data together with ACE solar wind data from 2001 to 2009 are used to investigate the dependence of the azimuthal flow direction of earthward magnetotail fast flows on the interplanetary magnetic field (IMF). We find an indication that fast flows have favored azimuthal directions that have dependence on the IMF. Our results sugg…
Proton entry into the near-lunar plasma wake for magnetic field aligned flow
Barabash, S.; Futaana, Y.; Wurz, P. +7 more
We report the first observation of protons in the near-lunar (100-200 km from the surface) and deeper (near anti-subsolar point) plasma wake when the interplanetary magnetic field (IMF) and solar wind velocity (vsw) are parallel (aligned flow; angle between IMF and vsw≤10°). More than 98% of the observations during aligned fl…
Orbital radar, imagery, and atmospheric modeling reveal an aeolian origin for Abalos Mensa, Mars
Spiga, A.; Holt, J. W.; Brothers, T. C.
Icy deposits surrounding Planum Boreum, Mars, contain crucial information for deciphering paleoclimate and past geologic processes at the martian north pole. One such deposit, Abalos Mensa, is an enigmatic wedge of material located near the ~ 1 km high Rupes Tenuis. Its unique location and lobate morphology have fostered formation hypotheses that …
Compositional effects in Titan's thermospheric gravity waves
Cui, J.; Müller-Wodarg, I. C. F.; Lian, Y.
In Titan's upper atmosphere, the density profiles of several constituents (N2, CH4, H2, and 29N2) as measured by the Cassini Ion Neutral Mass Spectrometer show periodical structures which we interpret as internal gravity waves. Compositional effects are frequently seen in the data, in which th…
Longitude dependences of Saturn's ultraviolet aurora
Carbary, J. F.
on periodicities in the kilometric radio emissions, the Saturn Longitude System 4 (SLS4) was used to organize the far ultraviolet (120-150 nm) aurora observed by the Ultraviolet Imaging Spectrograph on the Cassini spacecraft. Individual Ultraviolet Imaging Spectrograph pixels were projected onto the ionosphere of Saturn, transformed into the SLS4 …
Saturn's magnetospheric refresh rate
Krupp, N.; Jackman, C. M.; Mitchell, D. G. +3 more
A 2-3 day periodicity observed in Jupiter's magnetosphere (superposed on the giant planet's 9.5 h rotation rate) has been associated with a characteristic mass-loading/unloading period at Jupiter. We follow a method derived by Kronberg et al. (<link href="#grl50530-bib-0016"/>) and find, consistent with their results, that this period is mos…
A large-scale flow vortex in the Venus plasma tail and its fluid dynamic interpretation
Barabash, S.; Lundin, R.; Futaana, Y. +3 more
We report on the existence of a large-scale ion flow vortex, a curled tailward flow of solar wind H+ (SW H+), and ionospheric O+ in the Venus plasma tail. The vortex commences at dusk (-Y), driven by a transverse (to the solar wind) aberration flow component. Dusk magnetosheath and ionospheric ions move westward ac…
Influences of the interplanetary magnetic field clock angle and cone angle on the field-aligned currents in the magnetotail
Dunlop, M.; Liu, Z. X.; Shi, J. K. +1 more
The influences of the interplanetary magnetic field (IMF) cone angle θ and clock angle ϕ on the field-aligned currents (FACs) at the plasma sheet boundary layers (PSBLs) have been investigated using Cluster Data. The FAC occurrence increases monotonically with IMF cone angle and has two peaks at -90° and +110° clock angle, respectively. The peak a…
Correction to "Pc2 EMIC waves generated high off the equator in the dayside outer magnetosphere"
Dandouras, I.; Kistler, L. M.; Zhang, J. -C. +3 more
Interstellar He+ ring-beam distributions: Observations and implications
Galvin, Antoinette B.; Wimmer-Schweingruber, Robert F.; Berger, Lars +1 more
We report systematic measurements of the distribution of the incident angle of interstellar pickup He+ ions as observed by STEREO/Plasma and Supra-Thermal Ion Composition (PLASTIC). We have organized these observations according to the angle spanned by the Interplanetary Magnetic Field (IMF), B→, and the bulk solar wind velocity, vsw