The universe is expanding so fast, so the astronomers might require applying physics to understand the activity of cosmos, according to a new study. A new study revealed the growth rate of the Universe is ten percent faster than the previous prediction. According to the new study, the expansion of the universe is in the accelerating stage. The disparity is now one in 100,000 from one in 3,000. It is different from what the astronomers have observed and predicted previously. The lead author of the study- Adam Riess stated that there is a huge mismatch between prediction and reality.
Adam Riess is the professor of physics and astronomy in the University of Johns Hopkins in Baltimore, also the owner of Nobel Prize in the year 2011 for mathematics. It is known that the universe is expanding from the 1990s, but the reason behind the faster expansion is not cleared. Some astronomers believed that the sudden expansion might be due to a repulsive force- dark energy. Araucaria project by a collaboration of the scientists of the USA, Chile, and Europe, has observed the universe’s expansion. The scientists involved in that project have studied the star system.
LMC binary Star System was studied by imagining the dimming happened when a star passed by facing the neighbor star. However, the study carried out by the team of Riess has used the observations that are resulted in Araucaria project. The theory that is used by the astronomers is Cepheids’ brightness, known as a kind of standard candle that enables the scientists to measure the distance. The study team has incorporated the theory for better measurement of the distance. The scientists have calculated the current expansion rate of the universe and the value proposed is called Hubble constant. Hubble’s constant is named after Edwin Hubble- the American astronomer. The current number is over 46 km per megaparsec per second. One megaparsec is calculated about 3.26 million light years.
The percentage of the universe’s expansion was five percent is 2009. If the previously observed information to be believed, the percentage is 1.9. There is a huge difference in the value calculated by the theory and the actual value. One is the prediction based on the theories of physics on an earlier world; another is the measurement of the expansion of the universe currently.
According to the study, if both values are not matching with each other then, something very big is being missed from the calculation. A new cosmological model should be incorporated to understand how fast the universe is expanding. The predicted growth rate should be 67.4 kilometers per megaparsec per second, but the value differs. That means there is something that is miscalculated. The two observations, which are carried out are not different though; the result comes by the experiments are different. The new study by the researchers was published in the Astrophysical Journal on 25th April. The universe is expanding rapidly; there are much of studies to be carried out to understand the facts.