Astronomers utilizing NASA/ESA/CSA’s James Webb Space Telescope have made a groundbreaking discovery of a massive black hole in the early universe, which intriguingly appears to be older than its host galaxy. This revelation raises significant questions about the formation of the universe’s first supermassive black holes.
This Webb/NIRCam image captures the small red dot Abell2744-QSO1, magnified and triple-imaged by the galaxy cluster Abell 2744. Image credits: NASA / ESA / CSA / Lukas Furtak, Ben-Gurion University / Alyssa Pagan, STScI.
Abel 2744-QSO1 (commonly referred to as QSO1) is a typical “little red dot” existing just 700 million years post-Big Bang.
Though QSO1 spans only 1,300 light-years and its light has traveled over 13 billion years, it offers a more accessible study compared to other small red dots due to its gravitational lensing by the galaxy cluster Abel 2744.
QSO1 is uniquely magnified and appears in three locations in the sky, thanks to this lensing effect.
Dr. Roberto Maiorino from the University of Cambridge stated, “This is a remarkable discovery that represents a paradigm shift in understanding black hole formation and growth.”
Initial studies suggest QSO1 may consist of a cloud of glowing hydrogen and helium gas orbiting a supermassive black hole approximately 40 million times the mass of our Sun.
However, uncertainty lingered regarding the true scale of this black hole, similar to other early black holes discovered by Webb.
Dr. Francesco Deugenio of the University of Cambridge remarked, “Until now, measurements of black hole masses in the early universe have been indirect, based on established knowledge of local black holes.”
Researchers have employed the Integral Field Unit (IFU) of Webb’s NIRSpec instrument to effectively map the movement of hydrogen gas around this black hole.
They observed that gas exhibited Keplerian motion, indicating it orbits a central point much like planets orbit the Sun in our solar system.
Ignas Giouojuvaris, a graduate student at the University of Cambridge, added, “This finding indicates that most of QSO1’s mass is concentrated in the central black hole.” If the mass were dispersed like many stars, the gas wouldn’t exhibit such precise Keplerian rotation.
Using these gravity-driven Keplerian motions, researchers could directly calculate the black hole’s mass through gas velocity measurements, a feat previously unattainable.
The black hole was found to be around 50 million solar masses, astonishingly accounting for two-thirds of QSO1’s total mass—thousands of times larger than proportions found in nearby galaxies, where supermassive black holes typically comprise only a small fraction of their host galaxies.
The IFU configuration map supported these observations, revealing that QSO1’s gas is primarily hydrogen and helium, with minimal heavy elements like oxygen, expected in a star-rich galaxy.
With less than 0.5% of the Sun’s metallicity, QSO1 stands as one of the most pristine galactic environments ever analyzed.
Dr. Cosimo Marconcini, an astronomer at the University of Florence, proclaimed, “This is an extraordinary result—marking the first direct measurement of a black hole’s mass within the first billion years post-Big Bang, aligning with prior indirect measurements.”
The extraordinary mass of QSO1 relative to its host galaxy implies it could not have formed gradually through the merging and feeding of smaller stellar-mass black holes.
Giouojuvaris noted, “We might be witnessing a black hole that lacks a substantial host galaxy and predates stellar processes.” This offers compelling evidence for the existence of primordial black holes and direct collapse black holes, concepts previously theorized but not substantiated.
Whether the black hole in QSO1 originated as a massive seed shortly after the Big Bang or emerged later from the collapse of a giant gas cloud, it likely formed large and may be in the initial stages of cultivating a galaxy around it.
These findings are documented in two research papers: the journal Nature and Royal Astronomical Society Monthly Notices.
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I. Juojubaris et al. 2026. Direct measurements of black hole masses in small red dots at high redshifts. Nature 653, 1017-1021; doi: 10.1038/s41586-026-10579-4
Roberto Maiorino et al. 2026. A black hole in a nearly primordial galaxy 700 million years post-Big Bang. MNRAS 548 (1): staf2109;doi: 10.1093/mnras/staf2109
Source: www.sci.news
