An international team of researchers working in astronomy service The Baryon Oscillation Spectroscopic Survey, found the paradox, which can serve as evidence of the anomalous properties of dark energy. This is indicated by a discrepancy in terms of rate of expansion of the universe, obtained by different methods.
According to information received, the universe is expanding at a rate of 67 kilometers per second per Mpc, with an error of 1.5 percent. These results are consistent with estimates Planck mission, in which the cosmic microwave background radiation, has been studied ancient light that came after 380,000 years after the Big Bang.
However, they are inconsistent with the findings of astrophysicist’s team led by Adam Riess, calculate the Hubble constant based on the determination of distances up to 300 Type Ia supernovae and thousands. Since the brightness of the latter is always the same, they are the standard candles, in other words, there is an inverse relationship between brightness and their distance from Earth.
In the new study, the researchers studied the clustering of galaxies 1.2 million. In the early stages of the universe arose wave compressing the substance in clumps and leaving gaps of empty space between them. The distances between the clusters have allowed astrophysicists to estimate the rate of expansion of the universe. Thus, evidence was obtained that the discrepancy between the results obtained by different methods, are not accidental.
Scientists suggest that the discrepancy can be explained by the presence of an unknown type of particles, such as neutrinos new format that influenced the rate of expansion of the early universe. Another possible reason is that dark energy changes over time and gives it a greater acceleration than predicted. Furthermore, some investigators have questioned the accuracy of the method with standard candles. To verify the reality of differences, astrophysicists propose instead to use Cepheids variable stars of the type RR Lyrae or red giants.
Since its birth the universe is constantly expanding with acceleration. The reason for this process scientists call dark energy that pervades the entire cosmos and causes it to swell faster.