Seems like a reasonably professional paper by real authors, but the abstract seems suspiciously handwavy while the content is a bit thick for me. Can we get a

Seems like a reasonably professional paper by real authors, but the abstract seems suspiciously handwavy while the content is a bit thick for me. Can we get a BS check from the physicists here? Is this a good area for inquiry or just mining a giant data set for confirmation of a wonky idea? Also: what's the "heating" mechanism proposed? Dark matter infall would pick up energy I guess, but if it's expected to interact only with gravity that doesn't seem likely to do anything meaningful vs. the same cloud contracting on its own? What's being heated?