We’ve all had days when we wake up on the wrong side of the bed. But imagine a supermassive black hole having a rough day—well, that’s what’s happening with the one at the center of the galaxy SDSS1335+0728. This black hole, about 300 million light-years away, has surprised astronomers by suddenly bursting with the longest, brightest X-ray flares ever recorded.
For years, this black hole was quiet. Now, it seems to be in a feeding frenzy, experiencing repeated flaring events called quasiperiodic eruptions (QPEs). Researchers have named this active part of the galaxy "Ansky."
Detection of Ansky’s activity began in late 2019. Astronomers used NASA’s Swift X-ray space telescope to observe the black hole’s transformation. By February 2024, they noticed a pattern: Ansky was erupting regularly, which allowed scientists to observe and understand how this massive entity interacts with its environment in real time.
Joheen Chakraborty from MIT remarked that the X-ray bursts from Ansky are ten times longer and brighter than those from typical QPEs. Each flare releases an astonishing amount of energy—one hundred times more than previously seen eruptions. Notably, these events happen every 4.5 days, a record cadence for such phenomena.
Despite these findings, the cause of Ansky’s outbursts remains a mystery. Traditionally, QPEs arise when black holes consume stars, tearing them apart. However, there’s no evidence of star consumption in Ansky’s case. Erwan Quintin, an ESA research fellow, pointed out that even with advanced models, they still need more data to figure out what’s going on. He noted, “These explosive bursts seem to be telling us a different story.”
Interestingly, these bursts are set to provide valuable insights into gravitational waves, which can be detected by future missions like LISA (Laser Interferometer Space Antenna) planned for launch in 2037. Coupling the X-ray observations of Ansky with potential gravitational wave data will be crucial in unraveling the secrets of massive black holes.
This research underscores how much we are still learning about the universe. Each discovery opens new questions, prompting us to rethink what we know about the cosmos.
For more on black holes and related phenomena, you can visit NASA’s page on black hole research here.