By mapping the movement of galaxies of giant filaments that connect the cosmic network, Leibniz astrophysics Potsdam (AIP) astronomers, in collaboration with Chinese and Estonian scientists, have these long galaxy tendrils I found it to rotate on a scale of hundreds. Millions of light years. Rotation on such a huge scale has never been seen before.Results published in Nature Astronomy This means that angular momentum can be generated on an unprecedented scale.
Cosmic filaments are giant bridges between clusters of galaxies and dark matter that interconnect galaxy clusters. They pour the galaxy into and into the large clusters at its edge. “By using the Sloan Digital Sky Survey (a survey of hundreds of thousands of galaxies) to map the movement of galaxies on these giant space ultra-highways, we discovered the amazing properties of these filaments. Rotates, ”says Peng Wang, the lead author of currently published research and AIP astronomer.
“Despite being a thin cylinder with pencil-like dimensions, it’s hundreds of millions of light-years long, but only millions of light-years in diameter, but the tendrils of these wonderful materials rotate.” , Noam Libeskind, the starter of the AIP project, adds. “On these scales, the galaxies within them are themselves just dust specs. They move in orbit like a spiral or cork bottle opener and orbit the center of the filament as they move along the filament. Such spins have never been seen on such a huge scale, and there must be an unknown physical mechanism that causes these objects to be torqued. Means. “
How the angular momentum that causes rotation is generated in the context of cosmology is one of the important unsolved problems of cosmology. In the standard model of structure formation, the small overdensity that exists in the early universe grows through gravitational instability as matter flows from below into overcrowded regions. Such potential currents are non-rotating or curled. There is no primitive rotation in the early universe. Therefore, the rotation must be generated when the structure is formed.
In general, the cosmic web, especially filaments, is closely associated with galaxy formation and evolution. They also have a strong influence on the spin of the galaxy, often adjusting the direction of how the galaxy and its dark matter halo rotate. However, it is unclear whether the current understanding of structure formation predicts that the filament itself, an uncollapsed quasi-linear object, should rotate.
“Inspired by the theorist Dr. Mark Neylink’s suggestion that filaments can rotate, we looked for filament rotations and looked at the observed distribution of galaxies,” says Noam Libeskind. “It’s great to see this confirmation that intergalactic filaments rotate in real space and computer simulations.” Using sophisticated mapping methods, the observed galactic distribution was split into filaments. Each filament was approximated by a cylinder.
The galaxy in it was divided into two regions (projections) on either side of the filament spine, and the average red shift difference between the two regions was carefully measured. The average redshift difference is a substitute for the velocity difference (Doppler shift) between the receding and approaching galaxies of the filament tube. Therefore, the rotation of the filament can be measured.
This study suggests that depending on the viewing angle and the mass at the end point, the filaments of the universe show a clear signal that coincides with rotation.
See: “Possibilities of Observational Evidence of Space Filament Spins” by Peng Wang, Noam I. Libeskind, Elmo Tempel, Xi Kang, Quan Guo, June 14, 2021 Nature Astronomy..
DOI: 10.1038 / s41550-021-01380-6
https://scitechdaily.com/largest-rotating-structures-in-the-universe-discovered-fantastic-cosmic-filaments-where-galaxies-are-relatively-just-specs-of-dust/ The Largest Rotating Structure in the Universe Discovered – A Fantastic Cosmic Filament Where the Galaxy is a Relatively Just Dust Spec