Electron temperature of the solar wind.Solar wind provides an example of a weakly collisional plasma expanding from a thermal source in the presence of spatially diverging magnetic-field lines.  Observations show that in the inner heliosphere, the electron temperature declines with the distance approximately as [Formula: see text], which is significantly slower than the adiabatic expansion law [Formula: see text] Motivated by such observations, we propose a kinetic theory that addresses the nonadiabatic evolution of a nearly collisionless plasma expanding from a central thermal source. 
THERM
Electron temperature of the solar wind.Solar wind provides an example of a weakly collisional plasma expanding from a thermal source in the presence of spatially diverging magnetic-field lines.  Observations show that in the inner heliosphere, the electron temperature declines with the distance approximately as [Formula: see text], which is significantly slower than the adiabatic expansion law [Formula: see text] Motivated by such observations, we propose a kinetic theory that addresses the nonadiabatic evolution of a nearly collisionless plasma expanding from a central thermal source. 
THERM
Electron temperature of the solar wind.Solar wind provides an example of a weakly collisional plasma expanding from a thermal source in the presence of spatially diverging magnetic-field lines.  Observations show that in the inner heliosphere, the electron temperature declines with the distance approximately as [Formula: see text], which is significantly slower than the adiabatic expansion law [Formula: see text] Motivated by such observations, we propose a kinetic theory that addresses the nonadiabatic evolution of a nearly collisionless plasma expanding from a central thermal source. 
THERM
Electron temperature of the solar wind.Solar wind provides an example of a weakly collisional plasma expanding from a thermal source in the presence of spatially diverging magnetic-field lines.  Observations show that in the inner heliosphere, the electron temperature declines with the distance approximately as [Formula: see text], which is significantly slower than the adiabatic expansion law [Formula: see text] Motivated by such observations, we propose a kinetic theory that addresses the nonadiabatic evolution of a nearly collisionless plasma expanding from a central thermal source. 
THERM