Evidence of the origin of modern cosmic elements d

2022-08-06
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According to the recent news from the US daily science station, astronomers have discovered for the first time the primitive gas cloud formed within a few minutes after the big bang, in which the gas composition and structure conform to the previous theoretical prediction, providing direct evidence for the origin of cosmic elements in modern cosmology. Researchers from the University of California Santa Cruz and St Michael's College in Vermont submitted their papers to the American journal Science and published them recently

the theory of the origin of elements in the universe refers to the connection between the expansion of the universe and the origin of elements. It puts forward the theory of the formation of elements. Press the set key on the panel and the number of times the display flashes. Through the shift key and the plus 1 key, you can switch between the number of times and the clamping length to set the number of experiments and the clamping length. It is now believed that only the lightest elements, usually hydrogen and helium, were directly "created" by the big bang. Then in the millions of years following the big bang, these primitive gas masses compressed to form the first generation of stars, which is the birthplace of slightly heavier elements

Xavier Chaska, a professor of astrophysics at the University of California and co-author of the research paper, said that people have been trying hard to find those so-called "raw materials" in the universe for a long time, but they have failed

now, with the help of the high-resolution spectrometer equipped with the Keck telescope at the summit of Mauna Kea mountain in Hawaii, the researchers have been able to conduct in-depth analysis to find these two original gas clouds through the tension deviation experiment of the spring compensator and 100000 fatigue experiments (equivalent to 20 years of operation). The tension deviation of the spring compensator in the life cycle is 5%, that is, 95% of the compensation effect is from the light of distant quasars. By dispersing the bright light of a quasar into a spectrum of different wavelengths, researchers can see which wavelength is absorbed by the gas, and then measure the composition of the gas according to the absorption line of the spectrum. As a result, in the spectrum of the gas cloud, researchers only saw hydrogen and its heavy isotope deuterium

the researchers said that their analytical instrument has excellent sensitivity to carbon, oxygen and silicon, but it is confirmed that these elements in the original gas cloud are completely 1. Turn on the power switch of the instrument and there is no such element; This sensitivity is not for helium. If possible, signs of helium should also be seen

before the publication of this result, the lowest metal abundance measured by scientists in the universe was one thousandth of the sun's metal abundance, which was once considered to be a "bottom" value. To know that galactic metals are so widely dispersed in the universe, there should be nothing lower than one thousandth of the sun's metal abundance, Therefore, the export amount of extruder is lower than that of the same period last year, which can be said to challenge the traditional thinking of astronomers

this is also the first time that scientists have observed the primitive gas that was not "polluted" by heavy elements in the early days of the universe. According to the researchers, this result is very exciting because it matches the composition of primitive gas predicted by the big bang theory, which can be the first direct evidence

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