How Galaxies 'Simmered' Metals in the Cosmic Noon Era ⚡ экспресс
The James Webb Telescope allowed us to peek at the chemical makeup of galaxies from the 'cosmic noon' era, when the universe was just 2–3 billion years old. It turns out they have fewer heavy elements than models predicted. It's like a stellar 'soup' recipe that's missing salt—and we still don't know which spice we forgot. Maybe galaxies 'hide' their metals in a different way?
Galaxies are like giant kitchens where, in stellar cores, light atoms are fused into heavy ones — much like flour and water becoming bread. When a star dies, it spills its accumulated riches into the interstellar gas, seasoning it with 'spices': oxygen, carbon, iron. The James Webb Telescope caught the faint glow of heated oxygen in 34 galaxies shining 3 billion years after the Big Bang. By measuring the brightness of this light, like gauging a flame's temperature, astronomers calculated the oxygen abundance — breaking light into its colors works more precisely than a kitchen thermometer here.
It turned out: the heavier the galaxy, the more oxygen it holds — a relationship nearly identical to that of today's nearby galaxies. But computer simulations of the universe's evolution couldn't reproduce this consistency. Back in the era of cosmic expansion 10 billion years ago, stars were born much faster, yet the recipe for metal enrichment never wavered — as if a chef cooking ten times faster never missed a gram of seasoning.
🎯 The oxygen in our breath was once hurled out by an exploding massive star — we inhale the ashes of supernovae.