Astronomers spotted a galaxy dying after a major collision. It's bleeding out 10,000 suns' worth of gas each year. - Yahoo News
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Summary
The finding suggests that major collisions can leave galaxies leaking vital gases into space, a process that eventually starves them and halts star formation, thereby killing them."This is the first time we have observed a typical massive star-forming galaxy in the distant universe about to 'die' because of a massive cold-gas ejection," Annagrazia Puglisi, the study's lead author and a researcher at Durham University in England, said in a press release.As stars form, they produce winds. Astronomers think that these winds from stars and black holes carry star-forming material into distant space, eventually causing galaxies to die.But the discovery of ID2299's gas-leaking tail reveals a new path to galactic death."Our study suggests that gas ejections can be produced by mergers, and that winds and tidal tails can appear very similar," Emanuele Daddi, a co-author of the study and an astrophysicist at the Saclay Nuclear Research Center in France, said in the release.
As said here by Morgan McFall-Johnsen