Astrophysicists may have to flip the script on how the universe's "monsters" are born. Using the James Webb Space Telescope, an international team has found strong evidence that at least some supermassive black holes appear to have been "born big," instead of slowly growing from dead stars inside galaxies, per NASA. Research published in the journals Nature and Monthly Notices of the Royal Astronomical Society, based on observations of an object known as Abell2744-QSO1, or QSO1, suggests that black holes in the early universe may have formed first and only later built galaxies around them. One researcher calls it a "paradigm shift" in how these objects are thought to form and grow.
QSO1 is a tiny, distant "Little Red Dot" whose light has traveled more than 13 billion years, from a time just 700 million years after the big bang. Gravitational lensing by a galaxy cluster magnifies and triples its image, giving astronomers a better look. Using Webb's NIRSpec instrument, the team tracked how hydrogen gas moves around QSO1 and found it in Keplerian orbits—motion dominated by a single, compact mass, not by a spread-out collection of stars.
From those orbital speeds, scientists directly calculated the central black hole's heft at about 50 million times the mass of the sun, at least two-thirds of QSO1's entire mass and thousands of times the black-hole-to-galaxy ratio seen in neighboring galaxies. Composition maps also show the gas is almost pure hydrogen and helium, with less than 0.5% of the sun's "metallicity," meaning there's little sign of recycled stellar material. Together, the data point to a black hole that didn't slowly bulk up on generations of stars, but instead formed through a "direct collapse" of primordial gas or as a "heavy seed" shortly after the big bang.
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