Heating and acceleration of minor ions in the solar wind
نویسنده
چکیده
We make use of the results of a one-ion model of McKenzie et al. (1997) to obtain the critical solution describing the acceleration of a two-ion solar wind. The model includes preferential heating of the heavy ion species and the temperature anisotropy expected if the heating is predominantly due to ioncyclotron damping. The relationship of the model to the picture emerging from UVCS/SOHO observations is discussed.
منابع مشابه
Kinetic evolution and acceleration of the solar wind
We investigate the effects of kinetic waveparticle interactions on the solar wind using a global hybrid model. The model follows the evolution of the particle distributions along an inhomogeneous field line under the influence of wave-particle interactions, an ambipolar electric field that is consistent with the particle distributions themselves, and Coulomb collisions. This represents the “fir...
متن کاملThe Heating of Test Particles in Numerical Simulations of Alfvénic Turbulence
We study the heating of charged test particles in three-dimensional numerical simulations of weakly compressible magnetohydrodynamic (MHD) turbulence (“Alfvénic turbulence”); these results are relevant to particle heating and acceleration in the solar wind, solar flares, accretion disks onto black holes, and other astrophysics and heliospheric environments. The physics of particle heating depen...
متن کاملModeling the Effects of Fast Shocks on Solar Wind Minor Ions
Observations show that when a particles and other minor ions in the solar wind plasma encounter fast shocks they are heated more than protons and their bulk motion is decelerated less than protons. These effects have been studied using a three-fluid model, and the model predictions have been compared with observations. The comparison i dicates that for supercritical fast shocks the three-fluid ...
متن کاملWave Modeling of the Solar Wind
The acceleration and heating of the solar wind have been studied for decades using satellite observations and models. However, the exact mechanism that leads to solar wind heating and acceleration is poorly understood. In order to improve the understanding of the physical mechanisms that are involved in these processes a combination of modeling and observational analysis is required. Recent mod...
متن کاملHeating and Acceleration of the Solar Plasma
This tutorial focuses on basic physical concepts relevant to the heating of the corona and acceleration of the solar wind. We begin with a discussion of observations of the solar wind and solar corona and then develop a simple theoretical framework that allows us to explore some implications of the observations. Next we turn to observations of the lower solar atmosphere and their implications f...
متن کامل