The Structure of Supervoids -- I: Void Hierarchy in the Northern Local Supervoid — mentioned by jdnier

Sun, 19 Sep 2021 04:18:09 GMT

Mentioned his one of several fascinating comments in a recent HN post (source: https://news.ycombinator.com/item?id=28574406). > It's been known since the 1990s (https://arxiv.org/abs/astro-ph/9503044 ) that cosmic voids & supervoids aren't strictly speaking empty at the largest scales. More recently sky surveys have found evidence that we are probably in a supervoid: https://en.wikipedia.org/wiki/KBC_Void

Paper and discussion history. A mention is not an endorsement.

The Structure of Supervoids -- I: Void Hierarchy in the Northern Local Supervoid — mentioned by raattgift

Sat, 18 Sep 2021 07:35:22 GMT

> Galaxy filaments are thinning As far as I know there is no evidence that this is the case. Voids are reasonably well explained by Baryon Acoustic Oscillations (BAO) in the very early universe. There is a sketch of the process here: https://en.wikipedia.org/wiki/Baryon_acoustic_oscillations#C... The tl;dr is that the implosion of early dense baryon clouds created shockwaves which threw most of the matter (including dark matter) out of the regions that later became cosmic voids. Few voids are outright surrounded by denser parts of the cosmic web, and there are many "invasions" of dense…

Paper and discussion history. A mention is not an endorsement.

The Structure of Supervoids -- I: Void Hierarchy in the Northern Local Supervoid · HackerPapers discussions

The Structure of Supervoids -- I: Void Hierarchy in the Northern Local Supervoid — mentioned by jdnier

The Structure of Supervoids -- I: Void Hierarchy in the Northern Local Supervoid — mentioned by raattgift