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Astronomers observe the death of a distant galaxy for the first time



Astronomers witnessed the death of a distant galaxy for the first time, and they described it as a “true extreme event.”

When all the stars in the Milky Way die and no new stars are formed, the Milky Way itself will no longer exist. This happens when all the galaxy gas is ejected, making it impossible for new stars to form.

According to a study published in the journal Nature Astronomy on Monday, scientists are very happy to be able to capture this rare phenomenon using Chile’s Atacama Large Millimeter/Submillimeter Array Telescope.

It takes approximately 9 billion years for the light from the explosion galaxy ID2299 to reach the earth. Therefore, when astronomers accidentally observed it, they witnessed the universe that existed only 4.5 billion years ago.

Astronomers say that the value of natural gas lost by ID2299 every year is 1

0,000 suns-quickly exhausting the fuel needed to form new stars. This amazing release of gas appears to be the result of two galaxies violently colliding and merging together to create ID2299.

Currently, the Milky Way is forming stars hundreds of times faster than the Milky Way-depleting its remaining precious gas supply. Therefore, ID2299 is expected to die within tens of thousands of years.

galaxy.jpg
The artist’s impression of ID2299 indicates that the galaxy is the product of the Milky Way collision. Due to the merger, some of its gas is ejected by the “tidal tail”. New observations with ALMA have captured the earliest stages of the eruption, until the gas reached the very large proportion depicted in the painter’s impression.

European Southern Observatory


The lead author Annagrazia Puglisi said in a statement: “This is the first time we have observed a typical giant star-forming galaxy in the distant universe, which is caused by a large amount of cold gas ejection. To’die’.

Astronomers believe that this phenomenon is the result of galaxy mergers, because they can see rare “tidal tails” that are usually not seen in distant galaxies. Astronomers believe that this elongated star and gas stream is a direct result of the merger of the Milky Way.

They only observed the Milky Way for a few minutes, but it was enough to spot the elusive tidal tail.

Research co-author Emanuele Daddi (Emanuele Daddi) said: “Our research shows that mergers can produce gas jets, wind and tidal tails look very similar.” “This may make us change the “death” of galaxies. Understanding.”

If astronomers correctly believe that the merger resulted in a huge loss of gas, they will need to reconsider previous theories about how galaxies form and evolve and how they die. Other theories suggest that winds caused by active black holes or strong star formation are responsible for such deaths.

Co-author Dr. Jeremy Fensch (Dr. Jeremy Fensch) said: “The study of this single case reveals that this kind of event may not be rare at all, and that many galaxies have suffered from this possibility of’gravitational gas removal’, including Misunderstanding of past observations.”

“This may have a huge impact on our understanding of what really shapes the evolution of galaxies.”


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