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Structure, luminosity, and dynamics of the Venus thermosphere
Bougher, S. W.; Fox, J. L.
We review here observations and models related to the chemical and thermal structures, airglow and auroral emissions and dynamics of the Venus thermosphere, and compare empirical models of the neutral densities based in large part on in situ measurements obtained by the Pioneer Venus spacecraft. Observations of the intensities of emissions are imp…
The Organic Matter of Comet Halley as Inferred by Joint Gas Phase and Solid Phase Analyses
Korth, A.; Kissel, J.; Krueger, F. R.
During encounters with comet Halley, the experiment PICCA onboard GIOTTO measured the gas phase organic ion composition of the coma and the experiment PUMA onboard VEGA-1 measured the dust composition. Joining both results, we obtain a consistent picture of the parent organic matter from which dust and gas is produced. One recognizes a complex uns…
The Cataclysmic Variable Ss-Cygni
Giovannelli, F.; Martinez-Pais, I. G.
In this work we will try to give the most general panorama, comparatively with the conciseness, on SS Cygni which is the brightest dwarf nova. The dwarf novae form a sub-class of the more vaste panorama of the Cataclysmic Variables (CVs). For this reason firstly we will describe in general the CVs and the current theories which attempt to describe…
A Note on the Statistical Evaluation of Compressed Mass Spectra Obtained from Dust Particles in the Coma of Comet Halley
Jessberger, E. K.; Fomenkova, M.; Mukhin, L. +4 more
A weighing factor for individual dust grains based on an independent determination of the particle mass (rather than summing up the total number of ions of an element measured in all spectra) is established for the calculation of the average dust composition. The ion ratio distribution obtained from particles with different masses independent of c…