Waves coming from space.. How do scientists explain them?

Researchers from the Canadian University of “McGill” monitored a radio signal from the most distant galaxy known to date, and such signals help explain more about waves coming from space.

According to a statement issued by the university, the signal has a specific wavelength called the 21 cm line, and contributes to answering questions about the emergence of the universe.

The researchers received the radio signal via the Giant Metrowave telescope in India, coming from the galaxy known as SDSSJ0826+5630.

star collapse

The mentioned signal is not the first, as it was preceded by dozens of signals over previous years, including what came from depth The space.

In January 2017, astronomers were able to investigate the source of the fast flashes of radio waves, according to the journal Nature.

The prevailing interpretation at the time contradicts the research of McGill University, as one of the interpretations said that these rapid bursts of radio waves may result from the phenomenon of star destruction.

According to a report published by the BBC, scientists believed at the time that these rapid jets were triggered by high-energy pulsars, which are described astronomically as dead stars rotating on their axis, causing them to emit continuous non-stop electromagnetic radiation before fading into one of the black holes.

star collision

Another explanation received from scientists about those sounds coming from the sky, we say that it is the result of strong emissions that were pushed out as a result of the collision of small neutron stars.

Keith Bannister, an astronomer at the Commonwealth Scientific and Industrial Research Organization in Australia, said that the occurrence of a cosmic explosion requires the emission of huge amounts of energy, but the surprising thing is that the search for any explosion through telescopes It yields nothing.

He explains that this theory does not reach a logical explanation for these radio waves.

The theory of the origin of the universe

Researchers at McGill University and the Indian Institute of Science studied the signal, and found that it was emitted when the universe was 4.9 billion years old.

“It’s the equivalent of looking back at a time of 8.8 billion years,” said researcher Arnab Chakraborty, a postdoctoral researcher at McGill.

The researchers said the telescope was able to pick up the distant signal because it was bent by another galaxy between the signal and the telescope.

“This effectively results in the signal being amplified by a factor of 30 times, allowing the telescope to pick it up,” explained Nirupam Roy, co-author of the study and associate professor at the Indian Institute of Science.

This bending of the signal is called gravitational lensing, and it could help researchers monitor distant galaxies and the cosmic evolution of stars, according to a report on CBS.

“A galaxy emits different types of radio signals,” Chakraborty said. Until now, it was only possible to pick up this particular signal from a nearby galaxy, which limits our knowledge of those galaxies closest to Earth, but thanks to the help of a phenomenon.

Naturally occurring called gravitational lensing, we can pick up a faint signal from a record distance, and this will help us understand galaxy formation at much greater distances from Earth.”

The researchers were able to determine that the atomic mass of hydrogen gas in SDSSJ0826+5630 is roughly twice the mass of stars visible to us.

The researchers wrote in the study that hydrogen gas “provides the basic fuel for the formation of stars in the galaxy,” and understanding the evolution of galaxies through cosmic time requires knowledge of the cosmic evolution of this neutral gas.

The research shows that scientists may be able to investigate the cosmic evolution of neutral gas using low-frequency radio telescopes in the near future.


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