Magnetic diffusion in solar atmosphere produces measurable electric fields

Area of Science:

• Plasma Physics
• Solar Physics
• Astrophysics

Background:

• Magnetic energy release in astrophysical plasmas, like solar flares, is crucial for understanding space weather.
• Magnetic diffusion, driven by electric fields, is a proposed mechanism for this energy release.
• Direct measurement of electric fields at energy release sites in the solar atmosphere has been lacking.

Purpose of the Study:

• To detect and measure electric fields associated with magnetic diffusion in the solar atmosphere.
• To provide observational evidence for magnetic diffusion as a mechanism for energy release during solar events.
• To open new avenues for quantitative studies of magnetic diffusion in space plasmas.

Main Methods:

• Utilized the Daniel K. Inouye Solar Telescope for observations of an energetic solar event.
• Measured linear and circular polarization of the hydrogen Hε Balmer line (397 nm).
• Employed spectro-polarimetric modeling to interpret observed polarization signals.

Main Results:

• Detected polarization signatures indicative of electric fields at the site of a solar brightening.
• Spectro-polarimetric modeling confirmed that electric fields are necessary to explain the observed signals.
• Provided the first direct evidence of electric fields driving magnetic diffusion in the solar atmosphere.

Conclusions:

• The observations provide conclusive evidence for magnetic diffusion occurring in the solar atmosphere.
• The study demonstrates the capability to detect electric fields associated with magnetic energy release.
• This work establishes a new method for quantitatively studying magnetic diffusion in astrophysical plasmas.