A new study led by the University of California, Irvine, addresses a fundamental debate in astrophysics: the existence of invisible dark matter is necessary to explain how the universe works. Is there an observation, or can physicists explain how things work based only on matter that we can know directly?
Dark photons are hypothetical dark sector particles that have been proposed as force carriers, similar to electromagnetic photons but potentially related to dark matter. Image credit: University of Adelaide.
“Our paper shows how a real-world observed relationship can be used as a basis for testing two different models for describing the universe,” said Dr. One Dr. Francisco Mercado said:
“We conducted robust tests to distinguish between the two models.”
“This test required us to run computer simulations using both types of matter, normal matter and dark matter, to account for the presence of interesting features measured in real galaxies.”
“The features we discovered in galaxies would be expected to appear in a universe with dark matter, but would be difficult to explain in a universe without dark matter.”
“We have shown that such features appear in observations of many real galaxies. If we take these data at face value, the dark matter model is the one that best explains the universe we live in. It is reconfirmed that.”
These features explain patterns in the movement of stars and gas within galaxies that appear to be possible only in a universe with dark matter.
“The observed galaxies appear to follow a close relationship between the matter we see and the dark matter we inferred to detect, hence what we call dark matter. Some have even suggested that this is actually evidence that our theory of gravity is wrong,'' New York University said. Professor James Block of Irvine, California;
“What we have shown is that dark matter not only predicts that relationship, but for many galaxies it can explain what we see more naturally than modified gravity.”
“I am even more convinced that dark matter is the correct model.”
This feature has also appeared in observations by proponents of a dark matter-free universe.
“The observations we looked at, the very observations that discovered these features, were made by proponents of the no-dark-matter theory,” said Dr. Jorge Moreno, a researcher at Pomona College. Ta.
“Despite their obvious existence, there has been little analysis of these functions by the community.”
“We needed scientists like us who work with both ordinary matter and dark matter to start the conversation.”
“We hope that this study will spark a debate within our research community, but such features can only be found in our planet if both dark matter and normal matter are present on Earth.” We also found that it appears in simulations, so there may be room for commonalities in the universe. “
“When stars are born and die, they explode into supernovae, which can form the centers of galaxies, providing a natural explanation for the existence of these features.”
“Simply put, the features we investigated in our observations require both the presence of dark matter and the incorporation of normal matter physics.”
Now that the dark matter model of the universe appears to be a promising model, the next step is to see whether it remains consistent across the dark matter universe.
“It will be interesting to see if this same relationship can even be used to distinguish between different dark matter models,” Dr. Mercado said.
“Understanding how this relationship changes under individual dark matter models could help constrain the properties of dark matter itself.”
of paper Published online on Royal Astronomical Society Monthly Notices.
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Francisco J. Mercado other. Hooks and bends in the radial acceleration relationship: Discrimination test between dark matter and MOND. MNRAS 530 (2): 1349-1362; doi: 10.1093/mnras/stae819
Source: www.sci.news
