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UV Studies and the Solar Wind
Bertaux, J. L.; Lallement, R.; Quemeelais, E.
The solar wind carves a cavity in the flow of interstellar H atoms through the solar system by charge-exchange ionization. The resulting Ly-α sky pattern depends on the latitude distribution of the solar wind flux and velocity. We review how the solar wind characteristics (mass flux latitude distribution) can be retrieved from Ly-α observations, y…
Gamma-Ray Bursts and Very High Energy Gamma-Ray Astronomy
Hurley, K.
The current status of gamma-ray burst astronomy is reviewed briefly, with emphasis on experiments which might determine the burster distance scale. Recent observations by the EGRET experiment aboard the Compton Observatory, indicating the presence of delayed, high energy emission, are summarized. It is shown that searches for TeV emission from bur…
A Summary of Solar Wind Observations at High Latitudes: ULYSSES
Marsden, R. G.
The Ulysses mission has provided the first in-situ observations of the solar wind covering all solar latitudes from the equator to the poles in both hemispheres. The measurements from the first polar passes, made at near-minimum solar activity conditions, have confirmed the basic picture established on the basis of remote sensing techniques: the h…
The Heliospheric Magnetic Field
Balogh, André
The heliospheric magnetic field (HMF) is an important component of the heliospheric medium. It has been the subject of extensive studies for the past thirty five years. There is a very large observational data base, mostly from the vantage point of the ecliptic plane, but now also from the solar polar regions, from the Ulysses mission. This review…
Local Clouds : Distribution, Density and Kinematics Through Ground-Based and HST Spectroscopy
Gry, Cecile
The distribution, kinematics and physical properties of the interstellar matter surrounding the Sun can be inferred from ground-based and UV spectroscopic observations. On a 200 pc scale the local interstellar matter appears inhomogeneous and asymmetric. Although it generally flows towards the lower density region, it is composed of numerous small…