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Physicist The new "Hubble Constant" indicates that the universe is expanding rapidly – BBC News BBC Thailand



The Hubble Space Telescope reveals some images of a peanut nebula (N11) that are about two hundred thousand light years from Earth.Image copyright
NASA / ESA / HUBBLE

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The Hubble Space Telescope reveals some images of a peanut nebula (N11) that are about two hundred thousand light years from Earth.

Astrophysicists can measure the growth rate of the universe. Did you call "Hubble constant" this past year? Discovering that our universe grew at a higher speed than ever before Expert suggestion to review current physics principles Because it could not explain this phenomenon

The latest results of Hubble's ongoing measurements at the Astrophysical Journal were reported by a team of researchers led by Professor Adam Rees of the United States University of Johns Hopkins. Has used the Hubble Space Telescope to help evaluate these values ​​with new, more accurate methods. That way, there are only a hundred thousand errors.

Professor Rees's team used Cepheid's variable Magellanic Cloud star. Whether this is the distance measurement principle and the calculation of universe growth rate With stars transforming lighter than hundreds of thousands As a standard candle or universe light Use of astronomers as the main measurement uses light and flashing light at their precise frequencies To accurately calculate the distance in space

The results showed that the universe is expanding with the latest acceleration speed of 74.03 kilometers per second on MegaParsec. This means that the universe increases by 74.03 kilometers per second in every 3.26 million light years we look at from the world

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NASA / ESA / A.RIESS

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Stellar Clusters in the Great Magellanic Cloud What is the dwarf galaxy and the Milky Way galaxy satellite There is a celestial variable that is used to measure distance in the universe.

Such numbers increase from the same research group that was used to calculate and calculate last year, which is 73.5 kilometers per second for MegaParsec. It is also a figure of up to 9% compared to the original Hubble constant, which is calculated using data from a cosmic microwave background (CMB) that scientists consider to be such a condition. From the universe, when it appeared, about 380,000 years after the Big Bang incident

Professor Rees, who owns the Nobel Prize in Physics in 2011, said that "Hubble's Constant Calculated at the Beginning of the Universe With the latest Hubble Constant Conflict Pay attention to new issues in the most exciting cosmology of decades. The difference between these two figures may increase As long as it did not reach the point that it was not caused by an accident or measurement error

Prof. Rees pointed out that this phenomenon can be the result of dark energy, which accounts for 70% of all material and energy in the universe. This dark energy can act differently than we understood it. For example, a more frequent or darker substance may have a more serious interaction with a normal substance than before. All these factors have a significant impact on the growth rate of the universe

"We Have Cosmological Models Can't Explain It We may need to find a new approach to physics. Who can connect two different datasets at two different times together," said Prof. Reese.


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