Chinese astronomers have found evidences of dynamical dark energy

Almaty. September 13. Silkroadnews – Chinese astronomers have found evidence of dynamical dark energy, China Daily reported.
“An international research team led by Chinese astronomers revealed an evidence of dynamical dark energy,” the report reads.
The discovery, recently published on Nature Astronomy, in the article “News & Views”, written by the world expert in cosmology, showed that the nature of dark energy may not be the cosmological constant introduced by Albert Einstein 100 years ago, which is crucial for the study of dark energy.
The new study, as reported, was supported by the National Natural Science Foundation of China (NSFC), Chinese Academy of Sciences and Royal Society Newton Advanced Fellowship.
“Revealing the nature of dark energy is one of key goals of modern sciences. The physical property of dark energy is represented by its Equation of State (EoS), which is the ratio of pressure and energy density of dark energy,” the publication explains.
It is noted that in the traditional model of the Lambda-Cold Dark Matter (LCDM), the dark energy is essentially a cosmological constant, that is, a vacuum energy, with an EoS-1 constant. In this model, dark energy has no dynamical characteristics.
According to the publication, in 2016, a team of scientists in cooperation with SDSS-III (BOSS) under the guidance of Professor Gong-Bo Zhao from the National Astronomical Observatory of China (NAOC) conducted successful high-precision measurements of baryonic acoustic oscillation (BAO) in several cosmic epochs. Based on this measurement and the method developed by Zhao for dark energy research, Zhao’s team found evidence of the dynamical nature of dark energy at a significance level of 3.5 sigma. This suggests that the nature of dark energy cannot be a vacuum energy, but a kind of dynamic field. According to Zhao, this is “a crucial step towards understanding the nature of dark energy.”
It is reported that the dynamics of dark energy should be confirmed by subsequent astronomical studies using the Dark Energy Spectroscopic Instrument (DESI), designed to create a 3D-space map in 2018.
According to the NAOC press release, in the next five to ten years the world’s largest surveys of galaxies will become those observables that may become a key to uncovering the dark energy secrets.