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Email Astronomers and cosmologists have an inventory problem: There are the longstanding challenges with pinpointing dark energy and dark matter, two invisible components that together make up more than 95 percent of the cosmos. But there is also the lesser-known problem of missing baryon particles.
When astronomers observe the universe, they find just 10 percent of normal baryonic matter as easily observable matter in stars and nebulae, and another 40 percent has been found in diffuse clouds within galaxies.
It has been theorized that the remaining regular matter must exist as a diffuse gas between galaxies. And now the two new research papers indicate that baryonic matter does indeed exist in the form of filaments of gas between galaxies, making up the missing percentage.
The left panel shows how the same patch of the sky, along the line of sight to a galaxy cluster, appears when observed through various frequency channels, after careful removal of the dominant signals due to the Cosmic Microwave Background CMB and to the emission from our Galaxy.
The right panel shows a graph displaying the corresponding frequency channel along the electromagnetic spectrum.
The interaction, which only the Planck satellite so far has been able to detect, allows astronomers to spot the presence of matter, even if it is very faint at high redshifts.
InPlanck data was used to create a map of this effect throughout the observable universe. They stacked the Planck data to look in the areas between the galaxies.
Both teams found conclusive evidence of the baryonic gas filaments between the galaxies. Tanimura said the results between the two groups are consistent within margins.
It means that we can now start to make an entire map of the universe, including filaments as well as galaxies. We estimate the distribution and physical states of the missing baryons. By comparing the result which was unknown with current models such as cosmological simulations, we can make [a] more precise picture of the current universe and constrain the evolution of the universe.
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Sep 07, · An artist's impression of KIC , a mysterious star more than 1, light-years away. NASA/JPL-Caltech. At the end of August, two new papers were published looking at the dimming from KIC.
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The Mystery of the Universe's Missing ‘Normal’ Matter Has Begun to Unravel Previously undetected matter was found in the form of gas filaments between galaxies, which is a major step toward explaining the structure of the cosmos. These universes differ in a variety of physical properties, featuring multiple Big Bangs, space bubbles and maybe even an alternate version of you who is reading this article in a world run by slugs.
The Beginning of the Universe. Alexander Vilenkin. Low-energy regions appear as microscopic bubbles and immediately start to grow at a rate rapidly approaching the speed of light.
The bubbles are then driven apart by inflationary expansion, making room for more bubbles. An Unaddressable Mystery.
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