Webb spots unusual black hole at ‘cosmic dawn’ (Snapshots)
James Webb Space Telescope observations are reported to show a supermassive black hole about 660 million years after the Big Bang during “cosmic dawn,” with signs of a dense, hydrogen-rich envelope.
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What happened: JWST observations are reported to detect an early supermassive black hole during cosmic dawn
A science item reports that the James Webb Space Telescope (JWST) detected a supermassive black hole shortly after the Big Bang, at an age of about 660 million years. The reported epoch is described as “cosmic dawn.”
Environment: the black hole is surrounded by a dense, hydrogen-rich envelope.Light behaviour: the observed light behaviour is described as consistent with scattering that can make the black hole appear heavier than its true mass.
Background and earlier position: why black hole mass estimates depend on the surrounding gas
Black hole mass estimates in the distant universe rely on models that connect what telescopes measure—light—to physical properties such as mass. Radiation near a black hole can interact with surrounding gas, so the same black hole can show different observed signatures depending on local conditions.
