A brilliant flash from the depths of space has captivated astronomers, marking the brightest black hole flare ever recorded. This extraordinary event, witnessed by researchers, occurred in a distant galaxy, approximately 10 billion light-years away. The black hole, named J2245+3743, is estimated to have a mass of around 500 million Suns, making it a true behemoth in the cosmic arena.
In 2018, this supermassive black hole underwent a dramatic transformation, brightening 40-fold and becoming 30 times more intense than any similar observed event. At its peak, it radiated the power of 10 trillion Suns, a spectacle that left scientists in awe. This phenomenon, known as a Tidal Disruption Event (TDE), occurs when a star ventures too close to a black hole, succumbing to its immense gravitational pull and being torn apart.
The physics behind this process is intricate, but imagine a star being stretched and shredded into a stream of gas. A portion of this gas is flung away, while the rest spirals into the black hole, generating intense heat and brilliance. This is the source of the flares that astronomers detect.
The energy released during this event was a staggering 10^54 ergs, equivalent to converting the entire mass of the Sun into pure energy. This is millions of times more energy than a typical supernova. The brightness and distance of this event are remarkable; the light traveled 10 billion years to reach us, offering a glimpse into the early universe, when it was only one-third of its current age.
This black hole flare occurred within an Active Galactic Nucleus (AGN), a galaxy core already glowing due to its central black hole feeding on gas. The existence of such massive stars within the disk of an AGN challenges our understanding, as these stars can grow larger due to the matter dumped onto them from the disk. The energetics of this event suggest a great distance and brilliance, unlike any AGN observed before.
TDEs in AGNs are rare, as their brightness often masks these flares. The duration of this event, lasting over six Earth-years, is also noteworthy, considering the effects of cosmological time dilation. This discovery sets a new record for the most luminous black-hole-related flare, offering valuable insights into the behavior of black holes and the existence of very massive stars within AGNs.
