JWST Finds 3 Supermassive Black Holes in 12.5-Billion-Year-Distant Galaxy, Pointing to Early Mergers
Updated
Updated · Space.com · Aug 17
JWST Finds 3 Supermassive Black Holes in 12.5-Billion-Year-Distant Galaxy, Pointing to Early Mergers
3 articles · Updated · Space.com · Aug 17
Summary
Scientists identified three active supermassive black holes in galaxy J0148-4214, seen 12.5 billion light-years away, marking the first such evidence in the distant universe.
JWST could not image the black holes directly, so researchers used NIRSpec to track fast-moving hydrogen gas around each accretion disk and estimate their masses and growth rates.
Two black holes sit near the galaxy’s center just 620 light-years apart, with masses of 80 million and 600,000 suns; a third, about 2 million solar masses, lies 5,500 light-years out.
The smaller central black hole is accreting faster than the Eddington limit, while the outer black hole may not merge at all and could instead be flung out by a three-body interaction.
The finding supports the idea that mergers helped black holes bulk up quickly less than 1.3 billion years after the Big Bang and points to future tests by ESA’s planned LISA observatory in the mid-2030s.
How did these early universe black holes grow so massive when they seemingly outsize the very galaxies hosting them?
Could hidden spectral fingerprints in JWST data reveal that the early universe was dominated by black holes rather than stars?
If the third black hole is violently ejected from its galaxy, what happens to this rogue monster wandering the cosmos?
Triple Supermassive Black Holes Found in J0148-4214: A 12.5-Billion-Year-Old Glimpse into Early Galaxy Mergers and Black Hole Evolution
Overview
Astronomers used JWST’s advanced spectrograph to reveal three actively feeding supermassive black holes in the distant galaxy J0148-4214, a discovery made possible by disentangling overlapping hydrogen signals. This rare triple system likely formed from frequent galaxy mergers in the early universe, where each merging galaxy brought its own black hole. When two black holes stall in their merger, a third can trigger chaotic interactions that help them finally combine. These violent mergers funnel gas to the center, fueling black holes and starbursts, but also drive outflows that quench star formation. Future observatories like LISA are expected to detect the gravitational waves from such cosmic collisions.