Published: Wed, October 11, 2017
Science | By Hubert Green

The scientists finally detect the 'missing matter' of the Universe

The scientists finally detect the 'missing matter' of the Universe

Scientists have been faced with this cosmological problem for many years-there is a huge imbalance between how much we see and how much our models say should be there.

It is reported that the universe is over than 95 percent consists of dark matter and dark energy. This mismatch is known as the "missing baryon problem".

With a total of 260,000 pairs of such galaxies already explored, it turned out that in filamentary structures between them, baryonic matter is several times denser than elsewhere in the universe. Two teams of researchers have now claimed to have resolved this issue.

The community of scientist has always been hunting for a link to the missing matter of universe that is mysterious thing throughout the planet and gravitational pull. Both teams of researchers used the Sunyaev-Zel'dovich effect concept and used data on pairs of galaxies taken from catalogs in the Sloan Digital Sky Survey.

The scientists analyzed data obtained by the orbiting observatory Planck, created to study the cosmic microwave background (CMB), which remained after the Universe became transparent to thermal radiation. As the light travels, some of it scatters off the electrons in the gas, leaving a dim patch in the cosmic microwave background - our snapshot of the remnants from the birth of the cosmos. Because the tendrils of gas between galaxies are so diffuse, the dim blotches they cause are far too slight to be seen directly on Planck's map. One group found them to be three times as dense as the mean of observable matter, the other group six times-a difference that was expected, the groups explain, due to differences in distances from the galaxies that were studied.

Hideki Tanimura is from the Institute of Space Astrophysics in Orsay; France led one of the teams. "If this factor is included, our findings are very consistent with the other group".

Ralph Kraft, from the Harvard-Smithsonian Center for Astrophysics in MA, said the findings help align the discrepancy between observations and simulations of the universe.

So the two groups had to find another way to definitively show that these threads of gas are really there. He said the studies go "a long way" in showing that many of our fundamental ideas about space appear to be right.

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