Interstellar pickup protons and solar wind heating in the outer heliosphere

Details Interstellar pickup protons and solar wind heating in the outer heliosphere Interstellar pickup protons and solar wind heating in the outer heliosphere

Mar 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006astl...32..206c&link_type=abstract

Astronomy Letters, vol. 32, Issue 3, p.206-213

Astronomy and Astrophysics

Astronomy

11

Pacs Numbers 96.50.Ya - 96.50.Tf - 96.50.Zc

Scientific paper

The ionization of hydrogen atoms that penetrate into the heliosphere from the interstellar medium gives rise to a peculiar population of energetic protons (interstellar pickup protons) in the solar wind. The short-wavelength Alfvènic turbulence in the outer heliosphere is entirely attributable to the source associated with the instability of the initial anisotropic pickup proton velocity distribution. The bulk of the generated turbulent energy is subsequently absorbed by the pickup protons themselves through the cyclotron-resonance particle-wave interaction, and only an insignificant fraction of this energy can be transferred to the solar wind protons and heat them up.

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