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Low Energy Interplanetary Particles at Northern Solar Latitudes

Pick, M.; Krimigis, S. M.; Lanzerotti, L. J. +3 more

Numerical Determination of Mean Free Paths from Ulysses Data as a Function of Helio-Latitude and Upstream of a Reverse Shock

Smith, E. J.; Quenby, J. J.; Drolias, B. +1 more

Understanding Elemental and Isotopic Abundance Anomalies in the Galactic Cosmic Ray

Du Vernois, M. A.

New Insights on Late-A and Early-F Star Activity

Talavera, A.; Freire Ferrero, R.; Bruhweiler, F. +3 more

The onset of chromospheric activity in late-A and early-F stars is here discussed. The detection of Ly- emission core in several A and F atars with the IUE satellite, gives evidence for the presence of chromospheric layers in these stars up to B - V = 0m.19 (Marilli et al., 1996). Semiempirical chromospheric models for Altair allowed us (Freire Fe…

Inferences on Coronal Magnetic Fields from SOHO UVCS Observations

Romoli, M.; Wu, S. T.; Poletto, G. +2 more

The characteristics of the magnetic field ubiquitously permeating the coronal plasma are still largely unknown. In this paper we analyze some aspects of coronal physics, related to the magnetic field behavior, which forthcoming SOHO UVCS observations can help better understand. To this end, three coronal structures will be examined: streamers, cor…

Observations of the solar atmosphere from the Solar and Heliospheric Observatory (SOHO).

Schühle, U.

The Solar and Heliospheric Observatory (SOHO) spacecraft was launched on December 2, 1995, into a halo orbit around the first Lagrangian Point L1 between Sun and Earth, carrying into space a payload of twelve Sun observing instruments. Among them is a set of four complementary telescope/spectrometers to study phenomena and dynamics of the Sun's at…

Oblique Emission of Whistler-Mode Waves around Interplanetary Shocks

Balogh, A.; Forsyth, R. J.; Scime, E. E. +4 more

We present a study of whistler-mode wave generation and wave particle interaction in the vicinity of interplanetary shocks as observed by the Ulysses spacecraft. Generally the whistler-mode waves (measured in the frequency range 0.22-448 Hz) are observed downstream of the shocks where they persist for some hours. From the electron distribution fun…

Extremely Low Fluxes of Energetic Charged Particles in the High Latitude Heliosphere

Keppler, E.

Confinement of Electrons, Accelerated at Distant High Latitude Corotating Interaction Regions, to the Inner Heliosphere

Simnett, G. M.; Roelof, E. C.; Decker, R. B.

The Source of Anomalous He Acceleration and the Determination of the Interplanetary Transport Coefficient

Savopulos, M.