Supermassive Black Hole Grows in Early Universe Quasar

Subaru Telescope discovery offers rare window into rapid black hole growth

Published on Feb. 22, 2026

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Using the Subaru Telescope on Mauna Kea, an international team of astronomers has discovered an extraordinary quasar in the early universe that hosts one of the fastest-growing supermassive black holes known at this mass scale. This unexpected combination of rapid black hole accretion and bright X-ray and radio emissions offers a new perspective on how these massive objects form and grow in the early cosmos.

Why it matters

The discovery provides a rare observational window into the rapid growth of supermassive black holes in the early universe, a fundamental puzzle that has raised further questions about how these massive objects assembled so quickly after the Big Bang. Understanding the formation and growth of supermassive black holes is crucial for models of galaxy evolution.

The details

The quasar is undergoing extremely rapid accretion, pulling in surrounding gas at a breakneck pace, while simultaneously shining brightly in X-rays and producing strong radio emission from a jet - features that many theoretical models do not expect to coexist. This unexpected juxtaposition of phenomena offers a new perspective on how supermassive black holes grow in the early universe.

  • The discovery was made using the Subaru Telescope on Mauna Kea in Hawaii.

The players

Waseda University

A Japanese university that led the international collaboration of astronomers who made the discovery.

Tohoku University

A Japanese university that also led the international collaboration of astronomers who made the discovery.

Subaru Telescope

A large optical-infrared telescope located on Mauna Kea in Hawaii, which was used to make the observations.

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What’s next

Further observations and analysis will be needed to fully understand the implications of this discovery for models of supermassive black hole formation and growth in the early universe.

The takeaway

The discovery of this rapidly growing supermassive black hole in a distant quasar provides a rare glimpse into the early stages of black hole assembly, offering new insights into a fundamental puzzle in astrophysics.