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New galactic test clarifies the existence of dark matter



June 25 (UPI) – New computer models designed to simulate the distribution of dwarf axes surrounding Milky Way have clarified the presence of dark matter.

The models helped scientists to simulate "radial acceleration relationship" or RAR, caused the relationship between the satellite galaxies drawing the drag between galactic matter.

RAR considers the galaxic observed circular acceleration and acceleration to be explained by the galaxy's distribution of common matter.

The new models stand for acceleration caused by dark matter.

"We have now simulated, for the first time, RAR of dwarf axes with the assumption that dark matter exists", Cristiano Porciani, a researcher at the Argelander Institute for Astronomy at the University of Bonn, said in a press release. "It turned out they act like scaled-down versions of larger galaxies".

Simulations also allowed scientists to decide how satellite galaxies would probably occur in the absence of dark matter. Models showed, without a dark matter, that a satellite galaxy's RAR would be affected more directly by its distance from the mother galaxy.

The European Space Agency's Gaia spacecraft is currently gathering detailed details about the magnitude, the path and the speed of millions of stars, including stars inside the many dwarf axes surrounding the Milky Way.

Researchers hope that Gaia data can be used to test the predictions of the newest RAR models with the galactic observations. However, astronomers can wait for sufficient amounts of data.

"Individual measurements are not enough to test the small differences we found in our simulations," said Bonn doctoral student Enrico Garaldi. "But repeatedly looking at the same stars improves the measurements every time. Sooner or later it should be possible to determine whether the dwarf axes behave like in a dark matter universe ̵

1; or not."

The presence of dark matter is implied by its gravity, but it has not yet been discovered immediately. Most astronauts agree that dark matter exists. The presence of dark matter solves a variety of astrophysical problems.

However, some researchers have argued that alternative theories of gravity could connect some of the same theoretical gaps, making a new test for the existing dark matter needed.

Astronomer detailed the latest proposal test in the journal Physical Review Letters.


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