Astronomers have found new objects in the center of the Milky Way galaxy. There are not only accumulations of hot gas from a supermassive black hole in its center, but also superdense cold clouds of unknown origin. The results of their work were published in the scientific journal Nature.
By measuring the speed of movement of carbon monoxide molecules in them, astronomers came to the conclusion that these clouds did not fall on the Milky Way, as one might expect from observing other spiral galaxies, but were thrown out of its central regions and moved towards intergalactic space.
This form of emissions is not predicted by modern astrophysical theories. At the same time, they potentially play an important role in how star formation stops in various galaxies.
Active star formation over the past 50 million years could be one of the possible causes of gas emissions, but models suggest that such clouds have a rather short lifespan and cannot survive under high acceleration.
According to an alternative version, a fast-moving cold gas could have formed directly in the stream by mixing slow cool clouds and fast hot winds. However, modern models are not yet able to reproduce this process.
Scientists hope that subsequent observations and discoveries of new clusters of cold gas inside the “ears” of the Milky Way will reveal more about the origin of such clouds of hydrogen and help to understand whether similar emissions occur in other galaxies and what role they play in their evolution.