The Hubble telescope found a protective screen in two galaxies: it extends for 100 thousand light years

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The Hubble telescope found a protective screen in two galaxies: it extends for 100 thousand light years

Astronomers have found the answer to the question of how the two satellite galaxies of the Milky Way still remain intact despite the interaction with our galaxy.

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For billions of years, the two largest satellite galaxies of the Milky Way have been attracted by our galaxy. As a result, these objects lose their gas, but at the same time they remain intact and new stars continue to appear in them. But how can this happen if the gas leak from these galaxies is large enough? Using data from the Hubble Space Telescope, a group of American astronomers have finally found the answer to this riddle, writes Phys.

According to the author of the new study, Dhanesh Krishnarao from Colorado College, USA, many scientists have tried to explain this state of affairs in these galaxies. But only now Krishnarao and his colleagues have found the answer. They believe that the Milky Way's satellite galaxies, the Large and Small Magellanic Clouds, which are part of the Magellanic system, are surrounded by a corona or protective screen of hot gas.

The Hubble telescope found a protective screen in two galaxies: it extends for 100 thousand light years

The Hubble telescope found a protective shield in two galaxies screen: it spans 100,000 light years

This shield protects galaxies from gas leaking into the Milky Way and thus allows new stars to continue to form. The fact that such a protective screen may exist has already been shown by previous simulations. But only now, thanks to data from the Hubble Space Telescope, this has been confirmed. Scientists believe that the protective corona extends over 100,000 light-years from the Magellanic Clouds, but it is actually invisible.

The Hubble telescope found a protective screen in two galaxies: it extends for 100 thousand light years

The Hubble telescope found a protective shield in two galaxies screen: it spans 100,000 light years

According to Krishnarao, this corona of gas is a remnant of the primordial gas cloud from which these galaxies formed billions of years ago. Although scientists have already noticed such coronas around other dwarf galaxies, astronomers have never been able to study them in such detail as now.

“These two galaxies are nearby, unlike other distant dwarf galaxies, which are generally very difficult This makes it an ideal opportunity to study such protective shields and the evolution of dwarf galaxies in general,” says Krishnarao.

The Hubble telescope found a protective screen in two galaxies: it extends for 100 thousand light years

The Hubble telescope found a protective screen in two galaxies: it extends for 100 thousand light years

To detect a protective corona around two galaxies, scientists studied archived data from the Hubble Space Telescope. In particular, this concerned observations of quasars that are billions of light years away.

Quasars are very bright galactic nuclei that contain massive active black holes. The scientists decided that although the corona would be too faint to see, it should be visible as a kind of fog that absorbs the bright light from the quasars in the background.

 The Hubble telescope found a protective screen in two galaxies: it extends for 100 thousand light years

The Hubble telescope found a protective screen in two galaxies: it extends for 100,000 km. light-years

Thus, scientists were able to confirm its presence around two dwarf galaxies that are in our neighborhood. Scientists have found that the gaseous corona is composed of carbon, oxygen and silicon.

Focus has already written about the new image of a distant spiral galaxy, which was taken by the Webb Space Telescope and it is strikingly different from the same image taken by the Hubble telescope.