An astrophysicist at the University of California, in collaboration with an international research team, released a report saying that they used X-rays to detect part of the universe ’s missing matter. These are ordinary matter in the “missing family†of the universe and consist of conventional atoms. New observation data shows that it is very consistent with the standard model of cosmology.
5% of the cosmic matter is composed of baryons, the remaining 23% is elusive dark matter, and the other 72% is darker energy that is more elusive. Of just such a small percentage of baryons, half are still missing. Observing the atomic hydrogen between galaxies at one tenth of the age of the universe (that is, when the galaxy was just formed), it can be estimated that the amount of baryon matter at that time was much greater than the current amount, and other baryon matter was lost. The total value of all visible stars, galaxies and gases is actually smaller than half of this loss. The objects observed in this study belong to this missing part.
Fluid dynamics simulations of galaxy formation show that large amounts of baryon material may exist in warm intergalactic matter (WHIM) at temperatures between hundreds of thousands of degrees Celsius and 1 million degrees Celsius, rather than in stars or galaxies. But this gas cloud is hot and extremely rare, and even if it is detected, the evidence is vague.
An effective method is to detect the high ionization absorption line of elements heavier than helium. The O5 +, O6 +, and O7 + ions of oxygen (astronomers call them O-â…¥, O-â…¦, and O-â…§) are very important candidates. The spectrum of these oxygen ions can only be detected in the ultraviolet and X-ray bands. Observed. NASA's "Chandra" X-ray space telescope and the European Space Agency's "XMM-Newton" X-ray space telescope have made these observations possible. Using O-â…§ between X-rays and galaxies, astronomers ended up at 400 million. Part of the lost material was captured in a large galaxy just light years away.
Researchers are currently actively analyzing relevant data. In theory, more lost matter in the universe can be recovered by this method. Perhaps any previous theoretical estimation of the density of the universe is unreliable, and now it is finally expected to be clear step by step, and astronomers can also use this observation to infer the evolutionary history of the universe.
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