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Astronomers Detect Mysterious Radio Wave Far Away From Milky Way

CHIME is composed of four, 100-meter long half-pipe cylinders of metal mesh, which reconstruct images of the sky by processing the radio signals recorded by more than a thousand antennas.

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Space, astronomers
Part of a 64-dish radio telescope system is seen during an official unveiling ceremony, July 13, 2018, in Carnarvon, South Africa. A Canadian radio telescope has detected repeating radio waves from deep space. VOA

Astronomers in Canada have detected a mysterious volley of radio waves from far outside our galaxy, according to two studies published Wednesday in Nature.

What corner of the universe these powerful waves come from and the forces that produced them remain unknown.

The so-called repeating fast radio bursts were identified during the trial run last summer of a built-for-purpose telescope running at only a fraction of its capacity.

Known by its acronym CHIME, the world’s most powerful radio telescope, spread across an area as big as a football pitch, is poised to detect many more of the enigmatic pulses now that it is fully operational.

“At the end of the year, we may have found 1,000 bursts,” said Deborah Good, a PhD student at the University of British Columbia and one of 50 scientists from five institutions involved in the research.

 

Saraswati, astronomers
Earth is part of the Milky way galaxy. Wikimed

 

High energy bursts

Fast radio bursts (FRBs) flash only for a micro-instant, but can emit as much energy as the sun does in 10,000 years.

Exactly what causes these high-energy surges of long waves at the far end of the electromagnetic spectrum remains the subject of intense debate.

More than 60 bursts have been cataloged since 2007, but only one other, observed in 2012 at the Arecibo Observatory in Puerto Rico, was a repeater.

“FRBs, it seems, are likely generated in dense, turbulent regions of host galaxies,” Shriharsh Tendulkar, a corresponding author for both studies and an astronomer at McGill University, told AFP.

Cosmic convulsions created by the turbulent gas clouds that give rise to stars, or stellar explosions such a supernovae, are both possible incubators.

But consecutive radio bursts are a special case.

Space, Astronomers
The world’s largest single-dish radio telescope at the Arecibo Observatory in Arecibo, Puerto Rico, photographed July 13, 2016. Dwindling funds from the U.S. government and construction of bigger, more powerful telescopes are threatening this telescope’s future. VOA

No little green men

“The fact that the bursts are repeated rules out any cataclysmic models in which the source is destroyed while generating the burst,” Tendulkar added.

“An FRB emitted from a merger of two neutron stars, or a neutron star and a black hole, for example, cannot repeat.”

It is not yet clear whether the breeding grounds of repeating bursts are different from those that produce only a single radio pulse.

Significantly, the 2012 and 2018 “repeaters” have strikingly similar properties.

CHIME (Canadian Hydrogen Intensity Mapping Experiment) also spotted a dozen single burst radio waves, but with an unusual profile.

Most FRBs spotted so far have wavelengths of a few centimeters, but these had intervals of nearly a meter, opening up a whole new line of inquiry for astronomers.

Could these enigmatic radio pulses point to intelligence elsewhere in the Universe? Might they be messages in a bottle?

SpaceX, Astronomers
The night sky is lit up above Vandenberg Air Force Base, California, during the launch of a SpaceX rocket carrying an Argentine Earth-observation satellite. VOA

“It is extremely, extremely unlikely,” Tendulkar said.

“As a scientist I can’t rule it out 100 percent. But intelligent life is not on the minds of any astronomer as a source of these FRBs.”

Constructed in British Columbia, CHIME is composed of four, 100-meter long half-pipe cylinders of metal mesh, which reconstruct images of the sky by processing the radio signals recorded by more than a thousand antennas.

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“This signal processing system is the largest of any telescope on Earth,” the researchers said in a communique.

The other institutions with leading roles are the University of Toronto, the National Research Council of Canada, and the Perimeter Institute. (VOA)

Next Story

India’s Space Agency Locates Lunar Probe that Was Feared Lost as It Was Making its Final Approach

The Vikram lander was just two kilometers above the moon's South Pole Saturday when ground controllers lost contact with the spacecraft

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India, Space, Agency
Indian Space Research Organization (ISRO) employees react as they listen to an announcement by organizations's chief Kailasavadivoo Sivan at its Telemetry, Tracking and Command Network facility in Bangalore, India, Saturday, Sept. 7, 2019. VOA

India’s space agency says it has located the lunar probe that was feared lost as it was making its final approach towards the surface last weekend.

The Vikram lander was just two kilometers above the moon’s South Pole Saturday when ground controllers lost contact with the spacecraft. The Indian Space Research Organization said Tuesday the Chandrayaan-2 probe has discovered the lander on the surface, but had not yet established communications with Vikram, named after Vikram Sarabhai, the scientist regarded as the “father” of India’s space program.

If the probe landed intact, India will join the United States, Russia and China as the only nations to achieve a soft landing of a spacecraft on the moon. It will also become the first nation to attempt a controlled landing on the moon’s South Pole.

India, Space, Agency
India’s space agency says it has located the lunar probe that was feared lost as it was making its final approach towards the surface last weekend. Pixabay

The $141 million Chandrayaan-2 mothership entered lunar orbit nearly a month after it was launched aboard India’s powerful Geosynchronous Satellite Launch Vehicle Mark Three rocket.  The Vikram lander was designed to release a small rover that will roam the moon’s surface in search for signs of water, and to assess its topography and geology.

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Chandrayaan-2 was a huge step up from India’s previous space explorations, such as its first moon mission in 2008 and a mission to Mars in 2013 that involved sending a spacecraft to the Red Planet. (VOA)