I understand that it is very unlikely that neutrinos may form gravitationally clumped structures given the current age of the universe, but I was rather asking about far future scenarios (where neutrinos would not move fast)... Couldn't they cluster as they have a non-zero mass (once they have...
So it is just utterly impossible that neutrino halos may form? Even considering the links from #10 post?
Is it physically impossible (or not known) that neutrinos that will lose enough kinetic energy in the future bounding and clustering in structures (even if diffuse ones)?
if I read it correctly it indicates that hot dark matter (standard model neutrinos) cannot be the dominant form of dark matter, in the sense that it could be part of it, but not the majority of it. Dark matter would be mostly formed then by non-standard neutrinos, or put in another way, that...
Perhaps I'm misuing the word "structure". Let's see if I can clarify what I mean...
I don't necessarily mean compact structures like a "neutrino star", but more like diffuse halos surrounding large scale structures (I asked about halos surrounding galaxies before, but it's true that if we are...
Sorry I didn't mean to argue a position without further discussion, I just tried to point out that the article that I referenced indicated that standard model neutrinos could form structures corresponding to hot dark matter (which would in turn be a part of the total dark matter content, which...
Sorry, I didn't mean to lecture anyone. I just wanted to point out that there are studies that indicate that even with standard model neutrinos, some structures could be formed (perhaps in form of neutrino halos or as "hot" dark matter) in contrast to what post #2 seems to suggest (that it's...
Even at enormous future scales? Also, perhaps I didn't make it clear in the question, but I'm not claiming that these structures would be common or significantly abundant. Just asking if they are possible, even if they would be rather rare
According to this paper...
But eventually neutrinos would lose their kinetic energy in the future. Couldn't they be attracted by gravity to form structures then? Also, right handed neutrinos are a candidate for dark matter. So, couldn't left-handed neutrinos also form similar structures?
Would it be possible to eventually have structures made from neutrinos somewhere in the universe, as it is indicated in this question (https://physics.stackexchange.com/questions/80390/are-neutrino-stars-theoretically-possible), like halos of neutrino gas surrounding the center of galaxies...
My question would be:
Is there any way that would be based on known physics (that is, one way that would not be overly speculative or that requires anything outside the current knowledge about black holes) that could possibly trap all the radiation of a black hole so that it would not be...
A very massive charged black hole could reach a near-extremal state in the right conditions supressing the rate of emission of Hawking radiation (https://physics.stackexchange.com/questions/490524/evaporation-of-large-charged-black-holes)
Meanwhile, the radiation emitted by a black hole can be...
I was wondering whether the decay of neutrons and protons (if they happen to be able to decay, as it is predicted by some GUTs) could be avoided in some cases.
Let's begin with neutrons:
In principle neutrons have a very short time when they are isolated (around 10 minutes) and they suffer...
I was thinking about this paper (https://arxiv.org/abs/1405.0298) where the authors argue that there wouldn't be dynamical quantum fluctuations in a De Sitter space as fluctuations would be static once all perturbative radiation escapes the horizon (in the case that the Universe has a finite...