Solar-wind acceleration by energetic particles

Details Solar-wind acceleration by energetic particles Solar-wind acceleration by energetic particles

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2383f&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 19, p. 2383-2386

Physics

2

Interplanetary Physics: Energetic Particles, Solar, Interplanetary Physics: Cosmic Rays

Scientific paper

We present results from a two-fluid model of the solar wind which includes the thermal gas and a non-thermal particle population. Low-energy solar cosmic rays (10 to 100 keV) can help accelerate the wind by transferring some of their momentum to comoving magnetic irregularities. We find that increases in the wind velocity of the order of 100 km/s are not uncommon when a small amount (approximately 0.01 of the total pressure at the Sun) of cosmic rays is added in the solar corona. We discuss possible cosmic ray spectra and interplanetary diffusion ranges necessary to produce this effect. Cosmic ray spectra obtained from our model are consistent with experimental data at the 1 AU distance.

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