A new look at dark matter halos

A new look at dark matter halos

Artistic vision of the Milky Way. Blue halo material around the galaxy indicates the expected distribution of mysterious dark matter

Dark matter is a mysterious form of matter, covering approximately 80% of the universal mass. For several decades, she has been shying away from direct observation. The substance is not in contact with the light, but existence is assumed due to the effect on galaxies and clusters.

This substance extends far beyond the reach of the most distant stars in galaxies, forming a halo of dark matter. If the stars in the territories of galaxies rotate on an organized disk, then the particles of dark matter move in a chaotic swarm.

Previous studies have shown that the dark matter halo around galactic clusters is endowed with a “burst” effect. It causes a slowdown of the material and occurs in many different directions. This leads to the accumulation of matter on the edge of the halo and a sharp fall beyond. The original study focused on the information of the Sloan digital celestial survey, examining the distribution of galaxies in clusters. Further analyzes were based on data from the first year of studying dark energy using the gravitational lensing method. This allows you to calculate the mass profile and its distribution in the galaxy.

This method more clearly reflects the behavior of halo particles, and the results are generally consistent with those observed in the first study. The review by gravitational lensing really fixed the edge. But do not forget that it leaves a lot of room for error. Scientists plan to conduct a series of tests and observational companies in order to accurately reflect the situation with the “surge”.

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