3.4 billion light-years away, astronomers found a rapidly growing supermassive black hole, H1821+643, with unexpectedly low activity and higher gas density.

Astronomers discovered a rapidly growing supermassive black hole, H1821+643, 3.4 billion light-years away, which is not living up to expectations. Using NASA's Chandra X-ray Observatory and the Very Large Array, researchers found that the quasar has less influence on its surroundings than many giant black holes in other clusters. The analysis revealed a higher density of gas near the black hole at the galaxy's center, with lower temperatures than expected.

March 21, 2024
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