Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...123...93s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 123, no. 1, June 1983, p. 93-97. Research supported by the Consiglio Nazionale
Astronomy and Astrophysics
Astrophysics
16
Chemical Reactions, Comet Nuclei, Cosmic Rays, Ionic Collisions, Molecular Gases, Solar Wind, Chemical Bonds, Helium Ions, Hydrogen Ions, Liquefied Gases, Oxygen, Physical Properties, Temperature Dependence, Water, Comets, Ions, Energetic Particles, Physical Properties, Chemistry
Scientific paper
Some experimental results on the modifications induced in condensed gases by bombardment with fast ions are described. These results are interesting for cometary physics because they simulate, to some extent, the effects of the long irradiation of the cometary nucleus by cosmic rays or the effects of solar wind particles flowing onto cometary nuclei, comae and grains. It is shown that at distances greater than 5-6 AU fast ions become the most important agents of erosion and this can contribute to an understanding of the activity of some comets at large distances from the Sun. The production of some molecules (H2, O2, H2O) via such a process is also shown as a function of the solar distance.
Foti G.
Pirronello Valerio
Strazzulla Giovanni
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