Estimates of alpha particle heating in the solar wind inside 0.3 AU

Details Estimates of alpha particle heating in the solar wind inside 0.3 AU Estimates of alpha particle heating in the solar wind inside 0.3 AU

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.2673t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, March 1, 1989, p. 2673-2676.

Physics

7

Alpha Particles, Heliosphere, Helium Ions, Solar Wind, Space Plasmas, Interplanetary Medium, Magnetohydrodynamic Waves, Solar Corona, Temperature Distribution, Temperature Gradients

Scientific paper

Observations from the Helios plasma experiment (Rosenbauer et al., 1977) are used to determine the average temperature gradients of protons and alpha particles in the solar wind between 0.3 and 1 AU. It is found that He(2+) ions cool more slowly than adiabatically. The radial gradients of T(alpha) inside 0.3 AU are estimated. Evidence is found for continuous interplanetary alpha particle heating, supporting theories of extended ion heating by waves in the outer solar corona.

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