New method for estimating the deflection of light by gravity black holes can confirm the presence of extra dimensions in the universe.
Curvature direction of radiation by powerful gravitational field — one of the known effects of General Relativity. These gravitational lenses are actually observed in the universe and are an excellent practical confirmation of the validity of Einstein's calculations — as a rule, they are such massive body, as dense and entire galaxy clusters. For example, the famous Einstein Cross — images of distant quasars, distorted by light passing around lying between it and us galaxy ZW 2237 030. Even more perfect picture of a gravitational lens can be found in our article "The rings, lenses, and a horseshoe."
But the same effect of a gravitational lens should provide and black holes — including a supermassive hole, located in the active center of our galaxy. The corresponding analysis carried American astrophysicist Amitai Bin-Nan (Amitai Bin-Nun), Justin Khoury (Justin Khoury) and Ravi Sheth (Ravi Sheth). Amitai Bin-Nan said: "We found that if our universe is described by the theory, including the extra dimensions, the radiation in the vicinity of a supermassive black hole at the center of the Milky Way will be more intense than in the event that they do not exist."
Researchers assessed the effects of gravity on light liznirovaniya stars, which are located directly around Sagittarius A * — a compact radio source, which is typically associated with a black hole in the center of the Milky Way. The powerful influence of its gravity should make a noticeable distortion in the trajectory of the light from these stars, creating the illusion of multiple images of individual stars — as in the case of the Einstein Cross.
Scientists have calculated the theoretical position and brightness of the "secondary" illusory images of stars. It is shown that the brightness of the image must be a variable, and reach a maximum in those moments when the star is on the line between us and the Sagittarius A * (but, of course, behind a black hole).
In addition, we show that if we describe itself a supermassive black hole in the equations, based on the Randall-Sundrum model, which includes the idea of the five-dimensional structure of the universe, "secondary" image of the star S2, located just in the right region of space by 2018 will 44% brighter than when measuring only four. So, it is enough to prepare and carry out an exact experiment — and we learn, finally, the question of whether our universe with three spatial and one temporal dimension, or not.
All of this is to take only a few caveats. As is usually done in similar, complex from a mathematical point of view, the works, the researchers took a number of simplifications — for example, on the form of the black hole in five-dimensional space — and also threw some confusing picture of the "details" — such as the rotation of the black hole. Anyway, it's hard to say whether our ground-based telescopes, given the huge congestion around the galactic center and the power of the radiation emanating from there, to distinguish at least a secondary image of the star. Not to mention the fact, to separate its brightness nuances of other factors.