The new simulation shows exactly what dark matter looks like if we can see it

The new simulation shows exactly what dark matter looks like if we can see it

How do you study something invisible? This is a challenge facing astronomers who study dark matter. Although the dark matter in the universe is 85%, it does not correspond to light. This can only be seen by the gravitational effect on the published and other cases. To make matters worse, attempts to locate dark matter directly on Earth have so far failed.

Despite the bad qualities of dark matter, we have learned many things about it. We know it’s not just dark, it’s cold. As a result, they climb together and form the seeds of the galaxy cluster. It also often forms a halo around galaxies, making up most of the galaxy. However, there are still many unresolved questions about dark matter, so astronomers often develop new models for dark matter, comparing them to their observations to test their accuracy.

One way to do this is through the best computer simulators. Recently, a team from the Harvard and Smithsonian Center for Astrophysics conducted a detailed simulation of the dark matter universe, and it produced some surprising results.

In Antarctica, the ICUBNT Trino detector has searched for WIMPs. Credit: IceCube Support / NSF

The accuracy of any dark matter simulation depends on the assumptions you make about dark matter. In this case, the team assumes that darkness is the case Interacting poorly With 100 times larger than a proton. WIMP is one of the most popular theories for dark matter. Computer simulations of WIMP Dark Matter have already been performed. However, it was too much in resolution, mimicking the scale and features in the thirty commands of intensity.

In this simulation, galaxies form halo objects around, as we see. But interestingly, it has been found that haloes evolved from mass planets to galaxy halos, to large cheeks that form in galaxy clusters, on a mass scale. This is the same structure as the halo, where they are very dense towards their center and spread further along their edges. The fact that it occurs on all scales makes it an obvious feature of dark matter.

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The simulation shows dark matter halos on all scales. Credit: If. Wang; S. Bose / Center for Astrophysics

Although small scale halva are very small that can be detected by their gravitational effect on light, they can tell us how dark matter is active in itself. One idea about dark matter is that when dark matter particles collide with each other, they emit gamma radiation. Some gamma-ray observations The center of our galaxy receives more gamma rays, which may be due to dark matter. In this particular model, most of the gamma radiation produced by the dark matter comes from small haloes. Because the scale of a halo will affect the spectral spectrum of gamma rays, this sample makes special predictions about the amount of gamma-rays we should see in galaxies and other galaxies.

Dark matter is one of the biggest unsolved problems in modern astronomy. Although we would like to explore this directly, unless it does, such simulations are our most effective means of better understanding the issue of darkness.

Reference: Wang, J., Bose, S., Frank, CS et al. “The global structure of dark matter is in a vast set of 20 commandsNature 585.7823 (2020): 39-42.

Raven Weber

About the author: Raven Weber

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