These large-scale structures are thought to be formed by the hierarchical clustering of galaxies around primordial density fluctuations (quantum mechanical fluctuations in the density of the Universe in the very first moments following the Big Bang)..
Most are found in groups and clusters which are themselves part of large-scale structures such as sheets and filaments.
These structures contain millions of galaxies and are separated by large voids in which very few galaxies are found..
These massive, thread-like formations can reach 80 megaparsecs h−1 (or of the order of 160 to 260 million light-years) and form the boundaries between voids.
Galaxy filaments form the cosmic web and define the overall structure of the observable universe.
Artist's rendering of two string-like filaments of galaxies..
Cosmic filaments are dense, skinny strands of dark matter and galaxies.
They hold most of the universe's mass.
You can think of filaments as the threads connecting the cosmic web.
As filaments twist, they pull matter in and toward galaxy clusters at each strand's end.Aug 2, 2021.
In cosmology, galaxy filaments are the largest known structures in the universe, consisting of 'walls' of gravitationally bound galactic superclusters.
These massive, thread-like formations can reach 80 megaparsecs h−1 (or of the order of 160 to 260 million light-years) and form the boundaries between voids..
The theory of the Big Bang predicts that variations in the density of matter in the very first moments of the Universe led the bulk of the matter in the cosmos to condense into a web of tangled filaments..
Cosmic filaments are the largest collapsing structure in the Universe.
Recently both observations and simulations inferred that cosmic filaments have coherent angular momenta (spins).
In this work we present a new catalogue of Cosmic Filaments obtained from the latest Sloan Digital Sky Survey (SDSS) public data.
In order to detect filaments, we implement a version of the Subspace-Constrained Mean-Shift algorithm, boosted by Machine Learning techniques.
A computer simulation shows how a cosmic filament twists galaxies and dark matter into a strand of the cosmic web.
Filaments pull matter into rotation and toward clusters at their ends, visualized here with “test particles” shaped like comets.
Cosmic filaments are the universe’s largest known structures and contain most of the universe’s mass ( SN:
