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Decoding how 9 billion light years old Radio signal changes everything

Shikhar Tripathi by Shikhar Tripathi
22 January 2023
in Trending
Decoding how 9 billion light years old Radio signal changes everything
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Scientists have long sought to uncover the secrets of the universe’s origin. The Big Bang Theory is the predominant theory of the universe’s beginnings and suggests that all matter was created in a single, massive explosion. Furthermore, these radio signals, which are estimated to be 9 billion light years old, provide evidence of the universe’s age and further support this theory.

In the last century, advancements in technology, science, and mathematics have allowed for more detailed studies of the universe’s origin and, consequently, more accurate theories. As research continues, more and more secrets of the universe’s origins will be uncovered, providing invaluable insight into the mysteries of the cosmos.

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How India captured this signal

An exciting discovery has been made by scientists after detecting a particular type of radio signal from a galaxy situated around 8.8 billion light-years from Earth.

Astronomers have discovered a new galaxy that is emitting a radio signal with a specific wavelength called the ‘21 cm line,’ also known as the hydrogen line. This signal is a result of naturally occurring hydrogen atoms located in the galaxy and is used by astronomers to locate the galaxy in the universe. The galaxy is officially known as SDSSJ0826+5630.

Researchers in India and Montreal have captured a radio signal using the Giant Metrewave Radio Telescope. Their discovery was reported this week in the Monthly Notices of the Royal Astronomical Society journal. This remarkable detection of a radio signal from such a great distance away gives scientists a unique opportunity to explore the mysteries of the formation of the earliest stars and galaxies.

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Arnab Chakraborty, author and McGill University Department of Physics post-doctoral cosmologist, said in a statement this week that “it’s the equivalent of a look-back in time of 8.8 billion years.” The signal was emitted from the galaxy when the universe was just 4.9 billion years old.

He further added, “A galaxy emits different kinds of radio signals. Until now, it’s only been possible to capture this particular signal from a galaxy nearby, limiting our knowledge to those galaxies closer to Earth.” Scientists used the gravitational lensing method to detect this signal.

Gravitational lensing

Gravitational lensing, a natural phenomenon, enabled the detection of this faint signal from a record-breaking distance.

Gravitational lensing occurs when the light from a distant object is bent and magnified by the gravity of a massive object, such as another galaxy. This bending of light allows us to observe objects that would otherwise be too faint to detect.

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By using this phenomenon, astronomers were able to learn more about the universe beyond our own. The researchers were able to measure the gas composition of a distant galaxy by using the signal that was emitted from it.

The findings suggest that the atomic mass of the gas content of this galaxy is twice as high as the stars visible to us, and that it could be the key to unlocking the mysteries of how galaxies and stars form and evolve. This could lead to a better understanding of the structure and evolution of galaxies in the universe.

It is important to remember that the signal was not sent by aliens but was naturally emitted from the galaxy, which is responsible for the formation of stars.

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Tags: AstronomersDark matterGalaxyGiant Metrewave Radio TelescopeGravitational lensingHydrogen LineMontrealRadio SignalRoyal Astronomical Society journaluniverse
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