Elastic collisions of solar wind protons with interstellar neutrals (H and He) inside the heliosphere - A new approach

Details Elastic collisions of solar wind protons with interstellar neutrals (H and He) inside the heliosphere - A new approach Elastic collisions of solar wind protons with interstellar neutrals (H and He) inside the heliosphere - A new approach

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...169..298c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 169, no. 1-2, Nov. 1986, p. 298-304.

Astronomy and Astrophysics

Astrophysics

12

Atomic Collisions, Heliosphere, Interstellar Gas, Plasma Interactions, Solar Protons, Solar Wind, Elastic Scattering, Helium, Hydrogen, Stellar Temperature

Scientific paper

Using adequate interatomic potentials for H(+) + H and H(+) + He collisional systems, the deflection angle of the interstellar neutral is calculated as a function of the impact parameter in an elastic collision with a solar wind proton (at 1 keV energy). Most of the momentum transfer occurs in a few collisions with a very small impact parameter and a high angle deflection, and that small angle deflection collisions are negligible. Total cross sections for elastic collisions with a 1 keV proton are found for H and He. Classically, the temperature of interstellar helium is derived from the measured width of the cone of gravitationally focused helium in the solar system. With the new value of the cross section, the approach yields a very small broadening of the cone by elastic collisions.

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