Heating and Acceleration of Minor Ions in the Expanding Solar Wind

Details Heating and Acceleration of Minor Ions in the Expanding Solar Wind Heating and Acceleration of Minor Ions in the Expanding Solar Wind

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh51c0281h&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SH51C-0281

Other

7807 Charged Particle Motion And Acceleration, 7843 Numerical Simulation Studies, 7867 Wave/Particle Interactions, 2149 Mhd Waves And Turbulence, 2164 Solar Wind Plasma

Scientific paper

We present hybrid simulations of the interaction of Alfven waves with protons, alpha particles and a small abundance of oxygen 5+ using the expanding box model. The simulations test the sweeping mechanism of the heating and acceleration of the solar wind by cyclotron resonance with Alfven waves. The numerical simulations indicate that oxygen (and other minor ions) are efficiently heated in perpendicular direction and accelerated but are able to absorb only a limited amount of available energy in the Alfven waves. The presence of oxygen ions has a minimal influence on alpha particles and protons. However, for the parameters used in the simulations the heating and acceleration of alpha particles and protons are not very efficient. We also explore the role of the radial stretching which occurs in the acceleration region of the wind. This amounts to an expansion of the box also in the radial direction and leads to important parallel cooling. The combination of the perpendicular heating by Alfven wave and the parallel cooling induced by the radial expansion leads to the strong temperature anisotropies of oxygen ions. The simulations are discussed within the context of observations and theoretical models of the evolution of MHD turbulence and ion thermodynamics in the outer corona and accelerating solar wind.

Affiliated with

Also associated with

No associations

Rating

Heating and Acceleration of Minor Ions in the Expanding Solar Wind does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Heating and Acceleration of Minor Ions in the Expanding Solar Wind, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heating and Acceleration of Minor Ions in the Expanding Solar Wind will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1463099