Search Publications
Solar wind-driven flows in the Jovian magnetosphere
Simnett, G. M.; Desai, M. I.
Ion anisotropies in the sub-MeV/nucleon energy region have been measured during the inbound pass of Ulysses through the Jovian magnetosphere. Azimuthal flows in the direction opposite to corotation were detected at several different times, each lasting approximately hours, in the boundary layer and the outer magnetosphere. Similar flows were also …
The equatorial boundary of the ultraviolet Jovian north aurora observed with multispectral Hubble Space Telescope images
Grodent, D.; Dols, V.; Gérard, J. C. +1 more
Multispectral observations of the far ultraviolet Jovian aurora with the faint object camera (FOC) on board the Hubble Space Telescope are reported. They are used to describe and compare the morphology and the mean brightness of the H2 Lyman and Werner bands observed at 153, 125, and 130 nm. It is shown that most of the emissions are co…
The nature of comet Shoemaker-Levy 9 subnuclei from analysis of preimpact Hubble Space Telescope images
Mumma, Michael J.; Hahn, Joseph M.; Rettig, Terrence W. +2 more
We obtained Hubble Space Telescope (HST) Wide Field Planetary Camera images of comet Shoemaker-Levy 9 (S-L 9) prior to impact with Jupiter in 1994 to observe the effects of the Jovian gravitational field on the approaching fragments. The HST images were used to monitor the absolute brightness in the central regions of the comae, changes in the sur…
Upstream and downstream propagating waves generated by pickup ions near comet Halley
Glassmeier, K. -H.; Neubauer, F. M.; Krauklis, I. +3 more
It is well known that most of the Alfvén waves generated in the solar wind by cometary ion pickup are propagating upstream in the solar wind reference frame. However, the magnitude of the small proportion propagating downstream is extremely important because it controls the amount of ion acceleration driven by the second order Fermi process. The v…
Solar cycle dependence of the solar wind dynamics: Pioneer, Voyager, and Ulysses from 1 to 5 AU
Smith, Edward J.; Américo González-Esparza, J.
Magnetic field structure in the comet Grigg-Skjellerup pileup region
Coates, A. J.; Neubauer, F. M.; Israelevich, P. L. +1 more
The position of the Giotto spacecraft relative to comet Grigg-Skjellerup is found from the draping geometry based on the vector magnetic field data. It is shown that Giotto passed the cometary nucleus on the nightside. The behavior of the magnetic field vectors exhibits two different types in the pileup region. In the outer pileup region, the magn…
Low-energy particle oscillations and correlations with hydromagnetic waves in the Jovian magnetosphere: Ulysses measurements
Krupp, N.; Tsurutani, B. T.; Lanzerotti, L. J. +1 more
We report on measurements of energetic particle modulations (ions and electrons with energies E>50 keV) observed by the heliosphere instrument for spectra, composition, and anisotropy at low energies (HI-SCALE) aboard the Ulysses spacecraft that were associated with the only hydromagnetic (HM) wave event measured inside the Jovian magnetosphere…
Ulysses observations of corotation lags in the dayside Jovian magnetosphere: An evaluation of the hinged magnetodisc and magnetic anomaly models
Dougherty, Michele K.; Phillips, John L.; Hoogeveen, Gary W.
Ulysses observations during the inbound leg of the February 1992 encounter with Jupiter offer the opportunity to evaluate both the hinged magnetodisc and the magnetic anomaly models currently used to describe the Jovian magnetospheric corotation lag. Particle and field detectors on board Ulysses measure signatures of the current and plasma sheets.…