Dynamics of millicharged dark matter in supernova remnants

Understand

Dark matter could have a small electromagnetic charge, provided the charge-to-mass ratio is much less than that of electrons or protons.

• This candidate, commonly known as millicharged dark matter (mDM), would form a plasma and interact with the interstellar medium and electromagnetic fields within galaxies.
• In general, understanding the dynamics of mDM requires consideration of collective plasma effects.
• It has been proposed that mDM can be accelerated in supernova remnants, forming a dark cosmic ray population that would leave distinct experimental signatures.