Early supermassive black holes grew with extreme speed in the infant universe
In short: A review of quasar observations from the first billion years of cosmic history found that billion-solar-mass black holes already existed when the universe was less than 700 million years old. These massive objects grew so rapidly that they required both large initial seeds and highly efficient, sustained feeding from surrounding matter.
This research helps explain how the universe's largest structures formed during the epoch of reionization. By studying the light from distant quasars, scientists can map how the intergalactic medium was ionized and enriched with heavy elements.
The review synthesizes data from hundreds of discovered quasars. However, because it is a review of existing observations, it relies on the current limits of telescope sensitivity and the specific environments of the quasars studied.
Why it matters: The existence of massive black holes so early in time challenges our understanding of how quickly matter can organize in the universe.
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Sources
- Source: Research: Fan et al. (2023). Quasars and the Intergalactic Medium at Cosmic Dawn. Annual Review of Astronomy and Astrophysics. · cc-by
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