Determine the size of the galaxy through dark matter

Dark matter is a mysterious energy that accounts for most of the universe's mass, yet scientists still have not realized its nature. Researchers have succeeded in estimating the percentage of dark matter in the universe and describing the processes involved in the existence of this type of matter. But so far, no one has ever set up the distribution and activity of dark matter in a galaxy.

Astronomers from the Department of Theoretical Physics and Cosmology, University of Granada, under the direction of Eduardo Battaner, collaborated with researchers in the Department of Applied Mathematics, achieved important advances. : establishing the distribution and operation of dark matter in a galaxy.

New calculations for dark matter describe its density from which to understand the change of dark matter in a galaxy. This has not yet been put into practice. So far, the expression or activity of dark matter is only estimated and calculated through simulations, but the method of mathematical description is based on equations and functions describing each property of matter. dark makes these results more reliable.

Specifically, this new discovery provides a more accurate understanding of the true size of a galaxy. Collaboration between astronomers and mathematicians allowed the development of a dense function of dark matter in a galaxy, describing the distribution of dark matter from the galaxy's center to the lateral regions. out. When observing a galaxy to study dark matter, it can be seen that a galaxy size is much larger than the size measured from observing the visible radiation. The scientists also concluded that the density of dark matter is highest in the center of the galaxy and gradually decreases in outer regions , but significantly increases the total size of the galaxy.

Round dark matter.(Photo: Andalucía Innova)

Dark matter is a key component of the universe, but has not been observed directly. In fact, it is the component that makes up most of the mass of the universe . This concept was first used by Fritz Zwicky in 1933. He concluded that the existence of a considerable amount of material could not be observed, but must exist as an explanation of galactic movement. . Currently, the ratio of dark matter in the Universe is a common knowledge: 23% of dark matter, only 4% more visible matter, the rest is mysterious dark energy. Despite the fact that we know very well the percentage of dark matter as well as its activity; The nature of dark matter is still unknown. That is one of the most important challenges for cosmology.

Eduardo Battaner said: ' With these results, we still do not know the nature of dark matter, but we have determined its activity, and we have information that can help understand the properties Its other properties, such as temperature '.

Starting from the vast knowledge of a group of astronomers about galaxies, and applying that knowledge through mathematical models, a number of complex representation functions have been developed. Professor Juan Soler, of Granda University, runs the research related to mathematical models.