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Primordial black holes as a dark matter candidate has been ruled out - http://www.nature.com/news/search-for-primordial-black-holes-called-off-1.14551
The discussion centers on the status of primordial black holes (PBHs) as a candidate for dark matter, exploring theoretical constraints, potential formation mechanisms, and the implications of recent research findings. Participants examine the validity of claims regarding the abundance and existence of PBHs, as well as their role in the context of dark matter theories.
Participants express disagreement regarding the interpretation of recent findings on PBHs, with some asserting that they have not been definitively ruled out while others maintain that their role as a significant dark matter component is constrained. The discussion remains unresolved with multiple competing views present.
Participants note limitations in the current understanding of PBH formation mechanisms, the lack of precise models, and the challenges associated with numerical calculations in the context of gravitational collapse. These factors contribute to the ongoing uncertainty in the discussion.
This discussion may be of interest to researchers and students in astrophysics, cosmology, and theoretical physics, particularly those focused on dark matter candidates and the early universe.
Haelfix said:Is it possible there is a single PBH somewhere within our Hubble sphere? Yes,...
Fair enough, the Nature article was not unclear about this. The thread title, not so much. I accept the flogging.marcus said:... In sum, it's obviously legit to look for evidence of PBH in certain types of GRB events, and smart reputable people do it. Nothing that has come up, referred to in this thread (or elsewhere as far as I know) has ruled out the existence of PBH. So how about we make that clear?