Mordred
Science Advisor
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I agree with you Phinds. I can find no reason why the cosmological horizon would have any of the following, Hawking radiation, blackbody radiation or Unruh effect. The cosmological horizon is an observational limit of what we can see and measure. The only possibility of how it would have any of the previous is that we would never be able to measure beyond that point. In that case I can see one particle going beyond that limit, the other staying where we can measure. In that case the models could describe it as one of the aforementioned. However that is the only possibility I can see. In the case of a BH event horizon, that event horizon exists for a different reason in that outside the event horizon particles and light can still escape. I've looked for papers that described any of the mentioned radiations and have yet to find one that justified the cosmological horizon portion of the articles.