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Author Topic: Scientists Detect Mysterious Radio Signals From Deep Space  (Read 240 times)

Offline zorgon

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Scientists Detect Mysterious Radio Signals From Deep Space
« on: August 31, 2017, 01:40:28 AM »
FRBs: Repeating Radio Signals Coming from Distant Galaxy Detected by Astronomers
Hannah Osborne
NewsweekAugust 30, 2017


Quote



FRBs: Repeating Radio Signals Coming from Distant Galaxy Detected by Astronomers

Repeating radio signals from a mysterious source in a dwarf galaxy 3 billion light-years away have been detected by astronomers.

Using the Green Bank Telescope in West Virginia, scientists with the Breakthrough Listen initiative—a massive project dedicated to finding signs of intelligent alien life—recorded 15 repeating fast radio bursts (FRBs) on August 26. The discovery was announced as an Astronomer's Telegram and will be described in further detail in a forthcoming scientific article, according to a statement from Breakthrough Listen.

FRBs last just a few milliseconds and appear to be coming from deep space. Because FRBs have an extremely short duration, and because scientists usually find them in data only after the event has taken place, pinpointing their origin has not been possible.

Since their discovery over 15 years ago, almost two dozen FRBs have been recorded. Most often, they are one-off events, but in 2016 scientists announced in the journal Naturethat they had found a repeating radio signal—FRB 121102. By monitoring and tracking this repeating burst, they were able to trace it back to a dwarf galaxy 3 billion light-years away. Still, the source remained elusive. Nothing that we know of in that region of space could be producing these signals.

Now the Breakthrough Listen team has detected 15 more busts coming from FRB 121102. Vishal Gajjar, a postdoctoral researcher at the University of California, Berkeley, where Breakthrough Listen is based, observed the new bursts during a monitoring effort run. Over five hours of observation, he and his colleagues collected 400 terabytes of data over the 4 to 8 GHz frequency band, or C-band, which is mostly used for satellite communications transmissions.


FRBs: Repeating Radio Signals Coming from Distant Galaxy Detected by Astronomers
View photos

Analysis of the data revealed the new repeating pulses and showed that the source is in a “heightened activity state,” the Astronomers Telegram said. “Follow-on observations are encouraged, particularly at higher radio frequencies,” the team added.

Initial results indicate that FRBs emit at higher frequencies than previously observed. This discovery that should help scientists determine the source producing the bursts.

Several explanations for FRBs have been suggested. One is a cataclysmic event, such as a neutron star collapsing into a black hole. But such an event would produce only one burst and therefore does not explain the repeating pattern of FRB 121102. Another possible explanation is that they are coming from a young, highly magnetized neutron star, but so far nothing like this has been detected in this region of space.

Despite widespread speculation, the possibility of the signals coming from an advanced alien civilization has been largely ruled out.

https://www.yahoo.com/news/frbs-repeating-radio-signals-coming-180300017.html#comments

Offline zorgon

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Re: Scientists Detect Mysterious Radio Signals From Deep Space
« Reply #1 on: September 02, 2017, 04:02:11 AM »
Scientists Detect Mysterious Radio Signals From Deep Space
Strange bursts are coming from 3 billion light years away.
By Ed Mazza

Quote
An initiative set up to find signs of intelligent life in the universe has detected a series of mysterious radio signals from a dwarf galaxy 3 billion light years away.

Scientists with Breakthrough Listen say they’ve found 15 fast radio bursts, or FRBs, from a deep space “repeater” called FRB 121102.

The numbers indicate when the first signal was discovered, on Nov. 2, 2012.

While a few other FRBs have been detected, what makes this one unique is that it was heard again in 2015, and its location pinpointed a year later.


Gemini Observatory/AURA/NSF/NRC
Mysterious radio bursts were detected from a dwarf galaxy 3 billion light years away.

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Breakthrough Listen used instruments at the Green Bank Telescope in West Virginia to observe that location over 5 hours on Saturday, detecting 15 bursts over the entire 4 to 8 GHz frequency band, the organization said in a news release. 

“It’s very funky how the individual bursts can pop up anywhere in this wide range of frequencies, even though each individual burst has a relatively narrow frequency coverage,” Peter Williams of Harvard University told New Scientist. “I have yet to see anyone offer up a good explanation for how that might happen.”

Breakthrough Listen created a GIF showing 14 of the 15 signals in succession:



An earlier clip demonstrates just what FRB 121102 sounds like:



Quote
“Possible explanations for FRBs range from outbursts from rotating neutron stars with extremely strong magnetic fields, to more speculative ideas that they are directed energy sources used by extraterrestrial civilizations to power spacecraft,” the organization said.

http://www.huffingtonpost.com/entry/deep-space-radio-bursts_us_59a7bbcbe4b07e81d35530b7


Offline zorgon

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Re: Scientists Detect Mysterious Radio Signals From Deep Space
« Reply #2 on: September 02, 2017, 05:26:41 PM »
Bump....

Offline The Seeker

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Re: Scientists Detect Mysterious Radio Signals From Deep Space
« Reply #3 on: September 02, 2017, 06:06:55 PM »
Question: if the system pinpointed as the source is 3 billion light years away, then these FRB's are 3 billion years old, correct?
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