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First Energetic Particle Events Observed by the ERNE Instrument

Laitinen, T.; Vainio, R.; Valtonen, E. +6 more

The energetic particle instrument ERNE on-board SOHO started its observations on December 15, 1995. The low-energy sensor of ERNE, LED, is capable of measuring particles in the energy range from 1 to 10 MeV nucl^-1. From the beginning of the year 1996 until May 22, 1996, LED-observations included four energetic particle events above thre…

Galactic Cosmic Ray Confinement Time: Ulysses HET Measurements of the Secondary Radio - Nuclide ¹⁰Be

Connell, J.

Low energy charged particles in the high latitude heliosphere

Lanzerotti, L. J.; Armstrong, T. P.; Gold, R. E. +3 more

Low energy ion and electron measurements made over the south and north polar regions of the sun by the HI-SCALE instrument on the Ulysses spacecraft during its solar minimum polar passages are summarized. The polar flux levels were considerably reduced in comparison to fluxes in the vicinity of the heliospheric current sheet. Flux variations with …

The Bonn contribution to the extragalactic link of the HIPPARCOS proper motion system.

Tucholke, H. -J.; Brosche, P.; Odenkirchen, M.

In order to calibrate the proper motions of the Hipparcos astrometry satellite, our group has measured accurate absolute proper motions of Hipparcos stars in small fields around optically bright extragalactic radio sources or bright galaxies with star-like features. In addition, we also use fields where relative proper motions are calibrated by me…

Astrometric positions of stars with high proper motions in the Southern Hemisphere

Rousseau, J. M.; Perie, J. P.

Several stars with large proper motions, cited by W.J. Luyten, were included in the preliminary programme for the HIPPARCOS mission. When performing preparatory measurements of plates, difficulties were encountered in identifying certain of these stars when relying only on published coordinates. We have taken advantage of this work which relates t…

IUE observations of star formation in a cooling flow

Hansen, L.; JØrgensen, H. E.; NØrgaard-Nielsen, H. U.

Star formation in cooling flows is usually found to have an initial mass function deficient in massive stars, but the center of the cooling flow in Hydra A has been shown to contain a significant number of early type stars. Here we use UV-spectra obtained with the IUE satellite together with ground based data to constrain the nature of this young …

High resolution solar ultraviolet measurements

Vial, J. -C.; Wilhelm, K.; Curdt, W. +6 more

The increase of our understanding of the processes acting in the solar corona and maintaining it is strongly dependent on the quality of the data that are obtained to check theories. The fine structure of the solar atmosphere seen from the photosphere and extending to the hottest parts of the corona requires data with high resolution in all parame…

European Network for the Numerical Simulation of Space Plasmas

Roux, A.; Chanteur, G.

Energetic Particle Acceleration at Corotating Interaction Regions: Ulysses Results

Balogh, A.; Forsyth, R. J.; Desai, M. I. +3 more

Plasma wave observations from the ULYSSES spacecraft's fast heliographic latitude scan

MacDowall, R. J.; Lin, N.; Hess, R. A. +1 more

Plasma wave observations obtained by the Ulysses spacecraft in 1994 and 1995 over a heliographic latitude range of -70 to +70 deg show significantly different wave characteristics inside and outside the streamer belt. Langmuir wave bursts are most commonly found in magnetic holes, especially in fast solar wind. The intensities of ion-acoustic-like…