Tau.Neutrino said:
Dark matter may be fuzzier than we thought
Dark matter has a profound effect on our universe, shaping galaxies and even leaving its fingerprints on the energy left over from the Big Bang. Despite its relevance, dark matter is also extremely hard to detect — rather than observe it directly, astronomers instead look for clues based on its gravitational interaction with normal matter (the protons, electrons, and neutrons that make up everything we see and touch). Recent observations made with NASA’s Chandra X-ray Observatory have hinted that dark matter may be “fuzzier” than previously thought.
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“The authors use observations of the hot gas that permeates galaxy clusters to estimate the amount and distribution of dark matter”
Bad choice. The distribution of hot gas does not closely match the distribution of dark matter.
“dark matter should clump together in the centers of galaxies.”
Yes. This problem has been known since at least the year 1980. Various hypotheses have been developed to get around the problem. One hypothesis is that dark matter is a Majorana particle which allows self annihilation, but that is false because the gamma rays from such annihilation have never been observed.
“fuzzy dark matter is a model in which dark matter has a mass about 10 thousand trillion trillion times smaller than an electron.”
Axions again, proposed back in about 1983. That doesn’t work as an explanation for dark matter because they would influence the Sun’s output and no such modification has been observed.
“dark matter occupying several quantum states at once”
A hierarchy of axions. No. For same reasons as above.
