We know how to define the Temperature of a neutron star, as answered in this question. After watching the Sixty Symbols video about Forging Weapons from Neutron Stars, where the temperature and resulting black body radiation is a crucial element, I wondered how objects made (almost) entirely of neutral particles can radiate electromagnetic waves, since radiation is caused by acceleration of charged particles (at least in classical physics).
I can imagine a few possible answers, but I would like the expert's statement:
- Neutrons can be excited and radiate when relaxing
- Neutron stars aren't entirely neutral. The tiny fraction of protons and electrons radiate
- Neutrons are made up of charged quarks, and the quarks radiate
I believe this question is different from "Are neutron stars transparent" because I'm asking about the generation of black body radiation, not the lack of absorption of any radiation.