Dark matter is a substance that can be found in the Universe in enormous amounts. This element offers the necessary gravitational force in order to hold galaxies together.
Now, NASA’s Hubble Space Telescope has confirmed an already accepted theory of the so-called ‘Cold Dark Matter.’
Dark matter is an invisible and untraceable substance that incorporates the majority of the Universe’s mass. Astronomers can only identify dark matter’s existence deviously by calculating the way the enigmatic substance’s gravity impacts stars and galaxies.
Researchers using the NASA Hubble Space Telescope and a new detecting method have found dark matter creates much smaller clusters than earlier believed.
The outcome confirms one of the main predictions of the renowned ‘Cold Dark Matter’ theory. This hypothesis implies that all galaxies generate and are covered within clouds of dark matter.
Dark matter is composed of ‘cold’ particles, which means they move in a slow manner, that combine to form structures differing from hundreds of thousands of times the mass of the Milky Way to relatively tiny clusters the size of a house.
The Hubble Space Telescope data provides scientists with a new comprehension of dark matter’s nature and act.
Professor Tommaso Treu of the University of California and a member of the team that analyzes the substance said: “We made a very compelling observational test for the cold dark matter model and it passes with flying colors.”
There is no Need for an Alternative Theory
Clumps of dark matter have been found around massive and medium-sized galaxies, but until now, tiny clusters of the substance had not been detected. Because the evidence lacked, some scientists have created alternative hypothesizes, such as the one of ‘Warm Dark Matter.’ The ‘Warm’ theory implies the face that dark matter particles are traveling at a faster speed, moving around too fast to be able to combine and form smaller clumps.
The new Hubble data do not support this theory, though, finding that dark matter is colder, and it would have to be the opposite of the ‘Warm Dark Matter’ hypothesis.
Dr. Anna Nierenberg of NASA‘s Jet Propulsion Laboratory (JPL) said: “Dark matter is colder than we knew at smaller scales. Astronomers have carried out other observational tests of Dark Matter theories before, but ours provides the strongest evidence yet for the presence of small clumps of ‘Cold Dark Matter.’
“By combining the latest theoretical predictions, statistical tools, and new Hubble observations, we now have a much more robust result than was previously possible.”
The Hubble research team utilized a new method, which did not ask for observations of the gravitational impact of stars as tracers of dark matter. The scientists used eight powerful and faraway cosmic objects, known as quasars, or pulsars, which are areas surrounding black holes capable of emitting massive quantities of light.
The team then calculated the way the light expelled by oxygen and neon gas rotating around each of the quasars’ black holes is twisted by the gravity of a giant foreground galaxy, posing as a magnifying lens.