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Suprathermal electron loss cone distributions in the solar wind: Ulysses observations

Description: We present observations by the Ulysses solar wind plasma experiment of a new class of suprathermal electron signatures. At low solar latitudes and heliocentric distances beyond 3.37 AU Ulysses encountered seven intervals, ranging in duration from 1 hour to 22 hours, in which the suprathermal distributions included an antisunward field-aligned beam and a return population with a flux dropout typically spanning {plus_minus}60 ft from the sunward field-aligned direction. All events occurred betwee… more
Date: September 1, 1995
Creator: Phillips, J. L.; Feldman, W. C.; Gosling, J. T.; Hammond, C. M. & Forsyth, R. J.
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Partner: UNT Libraries Government Documents Department
open access

He abundance variations in the solar wind: Observations from Ulysses

Description: The Ulysses mission is providing the first opportunity to observe variations in solar wind plasma parameters at heliographic latitudes far removed from the ecliptic plane. We present an overview of the solar wind speed and the variability in helium abundance, [He] data on [He] in six high latitude coronal mass ejections (CMEs), and a superposed epoch analysis of [He] variations at the seven heliospheric current sheet (HCS) crossings made during the rapid-latitude-scan portion of the mission. Th… more
Date: September 1, 1995
Creator: Barraclough, Bruce L.; Gosling, John T.; Phillips, John L.; McComas, David J.; Feldman, William C. & Goldstein, Bruce E.
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Partner: UNT Libraries Government Documents Department
open access

A collisionless shock wave experiment

Description: Collisionless shock waves are a very important heating mechanism for plasmas and are commonly found in space and astrophysical environments. Collisionless shocks were studied in the laboratory more than 20 years ago, and more recently in space via in situ satellite measurements. The authors propose a new laboratory shock wave experiment to address unresolved issues related to the differences in the partition of plasma heating between electrons and ions in space and laboratory plasmas, which can… more
Date: April 1, 1995
Creator: Winske, D.; Jones, M.E.; Sgro, A.G. & Thomas, V.A.
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Partner: UNT Libraries Government Documents Department
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Long term behavior of trapped relativistic electrons and their correlation with solar wind speed

Description: We examine Los Alamos energetic electron data from 1979 through the present to show long term trends in the trapped relativistic electron populations at geosynchronous Earth orbit. Such populations are thought to be associated with high-speed solar wind structures typically present near solar minimum. We will show that high-energy electron fluxes, E > 1.4 MeV, displayed a solar-like cycle of about 10.5 years, but that the behavior is out of phase with the sunspot cycle. We will also compare rel… more
Date: December 1995
Creator: Belian, R. D.; Cayton, T. E.; Christensen, R. A.; Ingraham, J. C. & Reeves, G. D.
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Partner: UNT Libraries Government Documents Department
open access

Ulysses solar wind plasma observations from peak southerly latitude through perihelion and beyond

Description: We present Ulysses solar wind plasma data from the peak southerly latitude of {minus}80.2{degrees} through +64.9{degrees} latitude on June 7, 1995. Ulysses encountered fast wind throughout this time except for a 43{degrees} band centered on the solar equator. Median mass flux was nearly constant with latitude, while speed and density had positive and negative poleward gradients, respectively. Solar wind momentum flux was highest at high latitudes, suggesting a latitudinal asymmetry in the helio… more
Date: September 1, 1995
Creator: Phillips, J.L.; Bame, S.J.; Feldman, W.C.; Gosling, J.T.; McComas, D.J.; Goldstein, B.E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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