In a theoretical study, physicists suggest using orbital disturbances near supermassive black holes to detect wormholes captivated the imagination of science fiction fans: wormholes, the one Forming passage between two separate regions of space-time.
Such paths could connect one area of our Universe with another time and / or place in our Universe, or with another Universe as a whole.
Whether there are wormholes is up for debate. In an article published in Physical Review D on October 1
The method focuses on detecting a wormhole around Sagittarius A *, an object thought to be a supermassive Black Hole in the heart of the Milky Way . While there is no evidence of a wormhole, it is a good place to look for it, as wormholes require extreme gravitational conditions, such as those found in supermassive black holes.
In the new work, scientists write that it is a wormhole exists in Sagittarius A *, nearby stars would be affected by the gravity of the stars at the other end of the passage. As a result, the presence of a wormhole could be determined by searching for small deviations in the expected orbit of stars near Sagittarius A *.
"If you have two stars on each side of the wormhole, the star on our side should feel the star's gravitational influence on the other side. The gravitational flux will flow through the wormhole, "says Dejan Stojkovic, Cosmologist and Professor of Physics at the University of Buffalo at College of Arts and Sciences. "If you map the expected orbit of a star around Sagittarius A *, you should see deviations from this orbit if there is a wormhole with a star on the other side."
Stojkovic conducted the study with the first author of the study. Chang Dai, Ph.D., from Yangzhou University in China and Case Western Reserve University.
A close look at S2, a star orbiting Sagittarius A * This will be the kind of science fiction often imagines.
"Even if a wormhole can be crossed, humans and spaceships will most likely not pass," he says. "Realistically, you would need a negative source of energy to keep the wormhole open, and we do not know how to do it." Creating a huge wormhole that's stable requires some magic. "While there's no experimental evidence, that these passages exist, they are – according to the theory – possible. As Stojkovic explains, wormholes are "a legitimate solution to Einstein's equations."
The research in Physical Review D focuses on how scientists can search for a wormhole by looking for faults on the way from S2, a star, to the astronomers at the orbit of Sagittarius A * have observed.
While the current surveillance techniques are not yet accurate enough to detect the presence of a wormhole, Stojkovic collects data on S2 over a longer period of time or develops techniques to track his movement more accurately would make such a determination possible. These advances are not too far away and could occur within a decade or two.
Stojkovic warns, however, that the new method of detecting a wormhole could be used if one exists, but this is not necessarily the case proving that there is a wormhole.
"If we achieve the precision required in our observations, we may be able to say that a wormhole is the most likely explanation when we detect disturbances in the orbit of S2," he says. "But we can not say:" Yeah, that's definitely a wormhole. "There could be another explanation, something else on our side bothers the movement of that star." The outlines could indicate the presence of a traversable or non-traversable wormhole, says Stojkovic. Because gravity is the curvature of space-time, the effects of gravity on either side of a wormhole are felt, regardless of whether objects can pass or not.
Reference: "Observation of a Wormhole" by De-Chhang Dai and Dejan Stojkovic, October 10, 2019, Physical Review D .
DOI: 10.1103 / PhysRevD.100.083513
Dais work was supported by the National Science Foundation of China, National Basic Research Program, supported by China and the Shanghai Academic / Technology Research Leader Program, as well as Stojkovics work by the US National Science Foundation.