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01 / astronomy

JWST and ALMA Detect Dusty, Fast-Accreting Quasar in the Early Universe

Observations combining James Webb Space Telescope spectroscopy and Atacama Large Millimeter/submillimeter Array data have identified a dust-reddened quasar designated J1440+0019 at a redshift of 6.5488, less than a billion years after the Big Bang. The object hosts a supermassive black hole with an estimated mass of 1.1 billion solar masses radiating at roughly 80 percent of its Eddington luminosity. The host galaxy contains approximately 400 million solar masses of dust and exhibits high-ionization absorption systems moving at up to 3,600 kilometers per second, indicating fast nuclear outflows during the epoch of cosmic reionization.

Source: Phys.org Reported 26 Oct 2026

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