The blast lasted for three years and is over ten times as powerful as the brightest supernova .
die. And whereas supernova explosions only last a few months, this explosive event has been raging for at least three years.
AT2021lwx was first spotted by the Zwicky Transient Facility in California in 2020 and was then picked up by the Asteroid Terrestrial-impact Last Alert System based in Hawaii. Both of these systems are designed to survey the night sky for astronomical events that rapidly change in brightness over time, also known as"transients." This change in brightness can indicate a supernova or a gamma-ray burst deep in the universe or something much closer to home like a comet or an asteroid.
Wiseman and the team of astronomers think that AT2021lwx may be the result of a black hole violently disrupting a cloud of gas with a mass thousands of times greater than. As it did so, the black hole swallowed fragments of the gas cloud, sending shockwaves into both what remains of the gas and into a wider donut-shaped torus of dust surrounding it, causing them to emit bright electromagnetic radiation.
Following these observations, the researchers took the spectrum of light that was emitted from the event and split it down into its constituent wavelengths, measuring how light was emitted and absorbed around the event. This allowed the researchers to calculate the distance to the source of AT2021lwx.
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