in paper Published in Journal of Cosmology and Astroparticle PhysicsScientists have considered theoretical and observational cases of “cosmic glitches” in the universe's gravity.
Wen other. Specifically, we develop a model that modifies general relativity on a cosmological scale by introducing a "glitch" in the gravitational constant between the cosmological (superhorizon) and Newtonian (subhorizon) regions. Research. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics.
For the past 100 years, physicists have relied on Albert Einstein's theory of general relativity to explain how gravity acts throughout the universe.
General relativity, proven accurate by countless experiments and observations, suggests that gravity affects not just the third physical dimension, but also a fourth dimension: time. Masu.
“This gravity model has been essential to everything from theorizing the Big Bang to photographing black holes,” said Robin Wen, a researcher at the California Institute of Technology.
“But when we try to understand gravity at the cosmic scale, beyond galaxy clusters, we run into clear contradictions with the predictions of general relativity.”
“It's as if gravity itself is no longer fully consistent with Einstein's theory.”
“We call this contradiction a 'cosmic glitch.' When dealing with distances of billions of light years, gravity weakens by about 1%.”
For more than 20 years, researchers have been trying to create a mathematical model to explain the apparent contradictions in general relativity.
“Almost a century ago, astronomers discovered that the universe was expanding,” said Professor Nyaesh Afsholdi of the University of Waterloo.
“The further away a galaxy is, the faster it is moving, so much so that it appears to be moving at a speed close to the maximum speed of light allowed by Einstein's theory.”
“Our findings suggest that at precisely that scale, Einstein's theory may also be inadequate.”
The research team's “cosmic glitch” model modifies and extends Einstein's formula in a way that resolves some discrepancies in cosmological measurements without affecting existing successful uses of general relativity. This is what I did.
“Think of this as a footnote to Einstein's theory,” Wen says.
“Once we reach the cosmic scale, terms and conditions apply.”
“This new model may be the first clue to the cosmic puzzles we are beginning to solve across time and space,” Professor Afshodi said.
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Robin Y. Wen other. 2024. Anomalies in the gravity of the universe. JCAP 03:045; doi: 10.1088/1475-7516/2024/03/045
Source: www.sci.news
