There is an incredibly bright object billions of light years away that challenges the limits of energy in physics. It's a massive ball of hot gas shining brighter than billions of suns. It's hard to imagine something so dazzling. Astronomers have a few theories but are not entirely sure what it is.
One idea is that it could be an extremely rare and powerful type of supernova called a magnetar. If it is indeed a magnetar, it would be the most powerful supernova ever observed. This object is so radiant that astronomers are struggling to find words to describe it. Professor Krzysztof Stanek from Ohio State University humorously compared it to turning everything we know about magnetars up to the maximum level.
The object was initially detected by a network of telescopes called ASAS-SN (All Sky Automated Survey of Supernovae). Despite its incredible brightness, it cannot be seen without telescopic aid because it is located 3.8 billion light years away.
ASAS-SN has discovered around 250 supernovae since it began in 2014, but this particular discovery, named ASASSN-15lh, stands out due to its extraordinary brightness. It is 200 times more powerful than the average supernova, 570 billion times brighter than the sun, and 20 times brighter than all the stars in our Milky Way galaxy combined.
The energy source behind this extreme brightness raises intriguing questions for scientists. Todd Thompson, an astronomy professor at Ohio State, proposes that the supernova might have given birth to an exceptionally rare kind of star known as a millisecond magnetar. These magnetars are rapidly spinning and densely packed stars with incredibly strong magnetic fields.
To shine as brilliantly as observed, this magnetar would have to spin at a mind-boggling rate of at least 1,000 times per second and efficiently convert all its rotational energy into light, making it the most extreme magnetar known to be physically possible.
Considering these limitations, Thompson suggests that we may never witness anything more luminous than this if it truly is a magnetar.
In the following months, the Hubble Space Telescope will be employed to unravel this mystery by allowing astronomers to observe the galaxy surrounding the object. It is possible that the bright object lies in the center of a large galaxy, indicating that it may not be a magnetar but rather evidence of a supermassive black hole. If that is the case, it would imply an entirely new kind of event occurring at the core of a galaxy, a phenomenon never observed before.
Whether it turns out to be a magnetar, a supermassive black hole, or something entirely different, these findings are likely to challenge our current understanding of how objects form in the vast expanse of the universe.
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