Exotic 'Einstein ring' suggests that mysterious dark matter interacts with itself

Feb 6, 2020
Visit site
Cold molecular hydrogen is easily ruled out in local galaxies and clusters—and Dark Matter preferred—because CMH is not betrayed by its characteristic absorption spectra.

In the case at hand there is little chance to obtain absorption spectra. Given the extreme antiquity, I would like to suggest that this massive galaxy is still in possession of a sort of embryonic neutral hydrogen 'yolk-sac', if you will, that it has only started to deplete, that is masquerading in the attributes we would normally ascribe to DM.