The electric field strength of the Sun is approximately 750 Volts per meter, with a power density of about 1.4 kW/m² at Earth's surface. This electric field exists within the solar plasma, comprising free nuclei, electrons, and ions, and is theorized to influence solar wind dynamics. However, the prevailing view in solar physics suggests that the solar wind is primarily driven by thermal pressure gradients rather than electric fields. The complexities of the solar wind's behavior, including high-speed (800 km/sec) and slow-speed (400 km/sec) components, challenge existing models and indicate a need for further research.
PREREQUISITESAstrophysicists, solar physicists, and researchers interested in solar dynamics and plasma physics will benefit from this discussion.
DiamondGeezer said:I suppose what I'm asking for is the Electric field strength of the Sun as measured from the Earth. I assume that this electric field both accelerates and maintains the solar wind.
heliotrope said:There should be an electric field in the corona/heliosphere, owing the fact that electrons and protons have a much different mass. But, this field is too small to measure.
There are some theories that the solar wind dynamics are related to this field, the 'exospheric theory'. But, most in the field don't consider that the wind is driven by the electric field. One thing to consider is that the wind is quasineutral, so that the net force from a large scale field is zero.
The standard model of the solar wind posits that it is drived by thermal pressure gradients, analogous to fluid flow from a nozzle. but, this can't explain the observations. I side with those who believe wave-particle and/or diamagnetic effects drive the high-speed (800 km/sec) wind and explosive events drive the slow speed (400 km/sec) wind.
Pumblechook said:About 750 Volts / Metre or 1.4 KW / sq metre over all wavelengths.