Webb finds more elements than predicted too soon after the Big Bang
The uncertainty of science: Using the Webb Space Telescope, scientists have now detected a whole range of elements only 500 million years after the Big Bang, elements not expected to have been created by stellar evolution until much much later.
When the universe was still in its infancy – only 500 million years after the Big Bang or about 3% of its current age – some of the universe’s earliest stars and galaxies had already formed. Astronomers have long predicted that much of the gas surrounding these young galaxies must have remained rather pristine, composed of mostly hydrogen and helium, the primordial ingredients available in the newborn cosmos.
According to a study published by astronomers at the University of Arizona in Nature Astronomy, this picture likely is not correct. Instead, galaxies were already seeding the cosmos with heavy elements, such as oxygen and carbon, much earlier than astronomers expected. “We observed that heavy elements escaped from galaxies very, very early in cosmic time,” said Yongda Zhu, first author of the paper and postdoctoral researcher at the U of A Department of Astronomy and Steward Observatory. “Not only were the galaxies producing these elements, but they were also dispersing them, possibly seeding other galaxies.”
You can read the paper here [pdf]. Based on the data, these early galaxies are remarkably similar in make-up to galaxies in our own time, something that all cosmological theories had said could not happen. It was expected to take billions of years to produce these heavier elements.
The researchers attempt to account for this contradiction between theory and data by proposing that some of the first stars could evolve and die much faster than expected, thus seeding space with these heavier elements sooner.
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The key to understanding that paper, and deep-time papers generally, is redshift denoted z.
Before z=15 (that is, where z>15.1), galaxies simply don’t exist. This is called cosmic dawn. Rather, daybreak: https://arxiv.org/abs/2609.28257
The epoch handled in Zhu et al. here is a trio of elder galaxies at 7.2 < z < 9.3. Midpoint of reionisation is 7<z<8, 650-750 My. Seeing heavy "metals" (lithium, oxygen etc etc) at the z=9.31 galaxy is… wild.
Hamlet act like, scene 5,
“There are more things in Heaven and Earth than are dreamt of in your philosophy.”
I remember the first Hubble Deep Space images. The astronomers chose a small, relatively empty portion of the space, and kept Hubble aimed at it for some time. The huuge amount of galaxies in this “empty” area altered our perceptions.
Will the Webb Space Telescope someday concentrate on one area, and find a lot more stuff that “should not be there?”
What is beyond the limits of Webb? We shall “see.”
The most interesting part is how often Webb now seems to discover something that arrived earlier than theory had arranged for it.
Galaxies are too mature, elements appear too soon, structures form too quickly.
At some point the universe begins to look less premature than the timetable.
Nature has always been poor at reading models. 🦌
“”Nature has always been poor at reading models.””
I do not know what today’s prize is, but you have just won it with the above quote.
Maybe the big bang was really nothing more than a giant singularity.
Its acting like one.
I agree with Magnus that Bock’s quote gets the prize!!!!