- Astronomers can see that a distant galaxy is dying because it discharges cold air into space.
- This gas is essential for the formation of stars. When the galaxy can no longer die, they will die.
- This galaxy was formed by the merger of two galaxies into one collision. The remaining “tail” reduces the value of gasoline by 10,000 suns each year.
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For the first time, astronomers can clearly see that galaxies are beginning to die.
At a distance of nine billion light-years away, the galaxy ID2299 is losing the critical cold air that helps create new stars. Every year, it loses enough gas to produce 1
At this speed, the galaxy will soon run out of excess gas and cannot create new stars. For a galaxy, that is death.
The team of researchers who discovered ID2299 and its imminent demise published their findings in the journal Nature Astronomy on Monday.
They believe that ID2299 was formed after two galaxies collided and merged, thus forming a new galaxy. The resulting galaxy has a story-telling “tidal tail” from which stars and interstellar material flows into space.
When the outer layers of galaxies are stripped off when they merge, they tend to form tidal tails. Although they have been found in hundreds of galaxies, such tails in distant galaxies are usually too dark to be seen by astronomers on Earth. Researchers discovered it when it first began to extend into space. That is where all the gas escapes.
The discovery suggests that major collisions may cause galaxies to leak vital gas into space, a process that will eventually starve them to death and prevent star formation, thereby killing them.
“This is the first time we have observed a typical huge star-forming galaxy in the distant universe. This is caused by a large amount of cold gas jetting and causing’death’,” the lead author of the study, Anna, a researcher at Durham University in the United Kingdom Grazia Puglisi (Annagrazia Puglisi), said in the press release.
More than one way of “death”
As stars form, they generate wind. Scientists believe that there is a black hole in the center of every huge galaxy, and when it swallows matter that falls into its gravity, it also produces wind. Astronomers believe that these winds from stars and black holes bring star-forming matter into distant space, eventually leading to the death of galaxies.
But the discovery of ID2299’s leaky tail reveals a new way to the death of the Milky Way.
The co-author of the study, astrophysicist Emanuele Daddi of the French Saclay Nuclear Research Center, said in the report: “Our research shows that mergers can produce gas jets, wind and tidal tails. It may look very similar.” Post. “This may change our understanding of the “death” of galaxies.”
This discovery may also hint at the direction of our own galaxy. The Milky Way sprays its own cold air into the void and is expected to collide with the Andromeda Galaxy in about 4 billion years.
University College London (University College London) research and research co-author Chiara Circosta said in a press release: “Witnessing such a large-scale destruction has added an important link to the complex puzzle of galaxy evolution.”
When researchers used the Atacama Large Millimeter/Submillimeter Array (ALMA) in the Chilean desert to study the cold gas in 100 distant galaxies, they stumbled upon this doomed galaxy.
Puglisi said: “I am eager to learn more about this strange object, because I firmly believe that there are some important lessons to be learned to understand how distant galaxies have evolved.