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Home Astronomy

“Seeing” the Darkish Matter Net That Surrounds the Coma Cluster

February 11, 2024
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“Seeing” the Darkish Matter Net That Surrounds the Coma Cluster
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In keeping with our predominant cosmological fashions, Darkish Matter makes up the vast majority of mass within the Universe (roughly 85%). Whereas it isn’t detectable in seen mild, its affect might be seen primarily based on the way it causes matter to type large-scale constructions in our Universe. Based mostly on ongoing observations, astronomers have decided that Darkish Matter constructions are filamentary, consisting of lengthy, skinny strands. For the primary time, utilizing the Subaru Telescope, a workforce of astronomers directly detected Dark Matter filaments in an enormous galaxy cluster, offering new proof to check theories concerning the evolution of the Universe.

The workforce consisted of astronomers from the Division of Astronomy and the Center for Galaxy Evolution Research (CGER) at Yonsei College and the Division of Physics and Astronomy on the College of California Davis (UC Davis). Their outcomes appeared in a paper, “Weak-lensing detection of intracluster filaments in the Coma cluster,” on January fifth, 2024, in Nature Astronomy. Because the workforce defined, Subaru revealed the terminal ends of darkish matter filaments within the Coma Cluster spanning tens of millions of sunshine years.

abell 611 and its galaxies and dark matter
Hubble Area Telescope presents a cosmic cobweb of galaxies and invisible darkish matter within the cluster Abell 611. Credit score: ESA/Hubble, NASA, P. Kelly, M. Postman, J. Richard, S. Allen

Our accepted cosmological fashions predict that galaxy clusters develop on the intersection of Darkish Matter filaments that make up the large-scale construction of the Universe (“cosmic internet”) and lengthen for tens of tens of millions of light-years. Whereas this speculation is supported by observations of the distribution of galaxies and fuel (i.e., baryonic or “seen” matter) within the Universe, there have been no direct detections of the darkish matter part of intracluster filaments (ICFs) till now. Utilizing the Subaru Telescope, the Yonsei-led workforce looked for indicators of darkish matter filaments within the Coma Cluster.

This cluster is positioned 321 million light-years away within the course of the constellation Coma Berenices and incorporates over 1,000 recognized galaxies. It’s also one of many largest and closest galaxy clusters, which makes it candidate for in search of faint indicators of Darkish Matter. Nevertheless, its proximity additionally makes it tough to watch your complete cluster. However due to the Subaru Telescope’s mixture of excessive sensitivity, excessive decision, and vast subject of view, the workforce was capable of detect weak-lensing results that indicated the presence of ICFs within the Coma Cluster.

In brief, the workforce noticed how mild was amplified by Darkish Matter strands that stretched for tens of millions of sunshine years. That is the primary time these strands have been confirmed immediately, offering new proof for Darkish Matter and a way of testing cosmological theories.

Additional Studying: Subaru Telescope

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