Subject: What specific process gives rise to blackbody photons?

What specific process gives rise to the photons that comprise
a continuum blackbody spectrum?
What gives up energy to generate such a photon,
and how is the photon produced?
What charges are accelerated?

I majored in physics and math but can't resolve
this with any of my various texts in physics or astronomy.

thanks very much,
tony colosi

Re: What specific process gives rise to blackbody photons?