So all objects composed of matter emit black body radiation, which is photons of various frequencies. Is there an equivalent of black body radiation for other processes? Is there gluon black body radiation? Is there black body radiation in the form of gravitational waves?
In a related question, black holes can emit black body radiation due to their interaction with the electromagnetic field at the event horizon. Can this same kind of interaction happen with other fields, generating a similar type of radiation of other particles?