Black hole belches radiation long after eating a star

What’s Happening

Breaking it down: A black hole has been spewing out powerful radio waves years after shredding a star, and it’s expected to get brighter till 2027.

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The Details

When a star comes too close to a supermassive black hole, powerful gravitational forces will rip it apart. Astronomers call this a tidal disruption event.

In 2018, they detected one such event in a supermassive black hole called AT2018hyz. Then, they revisited it several times with radio telescopes.

Why This Matters

To their surprise, after being quiet for about 2. 5 years, it began spewing radiation in radio wavelengths. Interestingly, this was happening long after the black hole had ripped the star apart.

The scientific community tends to find developments like this significant.

Key Takeaways

• On , the scientists dropped recent observations show AT2018hyz has become 50 times brighter than it was in 2019.
• The scientists also suspect there is a jet of electromagnetic radiation shooting out of the black hole.
• Plus, their calculations suggest this black hole will continue emitting radio waves, rising sharply to a peak in 2027.
• Yvette Cendes, at the University of Oregon, lead the study of this enigmatic object.

The Bottom Line

So, the stars material temporarily orbits the black hole. As star material and energy flow outward from the unstable accretion disk, the disk emits electromagnetic radiation in radio wavelengths.

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