In 1920's Edwin Hubble, an American astronomer, showed that the recessional velocity of a galaxy increases with its distance from the earth, known as Hubble's law. Hubble's law is taken as the first observational basis for the expansion of the Universe, and provides strong evidence for the Big Bang model. The value of the expansion rate is called the Hubble constant. Hubble constant is a critical parameter in cosmology and the measurement of Hubble constant is a key task for the astrophysicists and cosmologists.
Recently a Chinese team leaded by Prof. Qing-Guo Huang from the institute of theoretical physics at Chinese Academy of Sciences proposed to utilize the Baryon Acoustic Oscillation (BAO) datasets to accurately determine the Hubble constant. Their work, entitled "An accurate determination of the Hubble constant from baryon acoustic oscillation datasets", was published in Sci China-Phys Mech Astron 2015, Vol. 58 No. 9.
To read more, click here.