[ad_1]
According to modern theoretical models, in old galaxies, there should be less dark matter than in modern ones. However, the discovery of an ancient galaxy 9 billion light years from Earth could lead to rethinking these models.
In a new study published in the Astrophysical Journal, astronomers from the University of Texas at Austin describe an unusual galaxy filled with dark matter, UkrMedia informs.
Black matter – a substance that does not reflect light, but is recorded by its gravitational influence on ordinary matter. It was first discovered in the 1970s when spiral galaxies were being studied whose outer regions were spinning too fast to be exposed to visible stars and gases alone. Astronomers have come to the conclusion that there should be an invisible mass. A decade of observation for galaxies has shown that almost all galaxies contain huge amounts of this "dark matter": moreover, in the universe, it is five times more than visible matter ordinary.
Most astrophysicists think that it is only in the early stages. The development of a dark matter galaxy is not much. It is thought that galaxies begin to accumulate dark matter only through an unknown process until now.
New observations made at the McDonald Observatory in Texas showed something opposite, the oldest galaxy filled with dark matter. light years from Earth. In other words, its light reaches our planet for nine billion years. It is safe to call it a look into the distant past of our universe.
Unlike other ancient galaxies, the DSFG850.95 is literally filled with dark matter, according to observations from the McDonald's Observatory.
This contradicts the basic theory that the ancient galaxies are fundamentally different from the modern universe.
"The galaxy we have discovered clearly contradicts this belief: it seems that dark matter behaves as usual, as in today's world," say scientists.
Source link
