How massive is the most massive known structure — the Great Attractor — and how much mass will it get?
Answers
So I asked a question about dark flow in which I inquired whether we were moving towards the "great attractor" and asking if there was visualizations of what that meant. While I received no answer, turns out while poking around on the internet I found that ironically a major new study had been published around the same time, which had precisely what I was looking for. It turns out yes we are moving towards the Shapely attractor, as is everything else in our neighborhood... Shapely Attractor My new question (with that settled) is that per the current understanding how dense is this "overdense" region estimated to be? (Or put slightly differently "How much mass is estimated to be concentrated in the densest region of the great attractor?") Secondly, assuming that our local group and the surrounding matter that appears on course to merge with the Shapely Attractor stays the course, and all that combined mass collapses into an ultramassive black hole or comparable ultra-massive object, how much mass can that monstrous singularity be estimated to have in the end? I think these questions bear some intrigue in a "most massive object in the known universe" sense. Perhaps it is somewhere in the study text, but I didn't see that exact figure.