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Home / Science / “The hidden matter of the universe” – Is its signal buried in 20-year-old space telescope data? (Weekend Features)

“The hidden matter of the universe” – Is its signal buried in 20-year-old space telescope data? (Weekend Features)



A new theory, physicist Michio Kaku says, is that the universe̵

7;s undiscovered dark matter could be the normal matter that makes up stars, planets and galaxies in a parallel universe. “If a galaxy was hovering above in another dimension, we wouldn’t be able to see it,” Kaku said. It will be invisible, but we will feel its gravity. Hence, it can explain dark matter. “

Hidden in the Web Universe

A new, less speculative discovery by scientists at the Institut d’Astrophysique Spatiale (CNRS / Université Paris-Saclay), shows that dark matter remains undetected, concealed as hot gas in the lattice. complex universe. For the first time, possible signals of hidden matter have been detected in thin fibers of a space network that conceal 20-year-old spacecraft data through an innovative statistical analysis.

Earlier, a 2019 study from RIKEN Cluster for Pioneering Research and the University of Tokyo, strongly showed that the gas falling along the giant strands under the action of gravity in the early universe triggered the formation of starbursts and supermassive black holes, creating the cosmic structure we see today.

Frantic search for dark matter cues – “Where are they hiding?”

Weak signal

The CNRS findings show that “galaxies are distributed throughout the universe as a complex network of nodes connected by strands, which in turn are separated by gaps. This is called a space network. These fibers are thought to contain almost all of the cosmic common matter (known as the baryonic) in the form of a hot, diffuse gas. However, the signal emitted by this diffuse gas is so weak that in practice 40 to 50% of the baryon is undetected.

X-ray emission from hot Baryons

These are the missing baryons, as reported by the Institut d’Astrophysique Spatiale (IAS) hidden in the fibrous structure of the cosmic lattice, that Nabila Aghanim, Research Director at IAS and Hideki Tanimura, a postdoctoral researcher , along with their peers, are trying to find out. In the new study, they present a statistical analysis showing for the first time X-ray emissions from hot baryons in filaments.

“Huge Movies” – Supermassive black hole action movies in the early universe

This finding is based on the stacked X-ray signal, in the ROSAT2 survey data, from about 15,000 large-scale cosmic fibers identified in the SDSS3 galaxy survey. The team used the spatial correlation between the position of the fibers and the associated X-ray emission to provide evidence of the presence of hot gas in the cosmic lattice and measure its temperature for the first time. .

“Lost” – Can dark matter become a light source in the universe?

These findings confirm previous analyzes by the same team, based on indirect detection of hot gas in the cosmic lattice through its effect on the cosmic microwave background. This paves the way for more detailed studies, using better quality data, to examine gas evolution in the fiber structure of the cosmic lattice.

Source: H. T Tanimura et al. Discovered for the first time stacked X-ray emissions from space lattice fibers, Astronomy & Astrophysics (2020). DOI: 10.1051 / 0004-6361 / 202038521

The Daily Galaxy, Max Goldberg, via CNRS

Image credit: top, Shutterstock License; Text image of cosmic web fibers ,: CERN




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