Canadian scientists using the Canadian Canadian Hydrogen Intensity Mapping Experiment found 13 FRBs (Fast Radio Bursts), including the second largest repeater. And they think they will find even more.
CHIME is an innovative radio telescope in the Okanagan Valley region of British Columbia, Canada. It was completed in 2017 and its mission is to act as a kind of time machine. CHIME will help astronomers understand the shape, structure and fate of the universe by measuring the composition of dark energy.
The unique design of CHIME also makes it suitable for detecting fast radio bursts.
Fast radio bursts are high-energy events in space that we detect as a transient pulse of radio waves. They usually last only a few milliseconds. Scientists are not sure what their origin is, even if it is definitely outside the Milky Way. Some of the suggested sources are black holes or neutron stars that rotate rapidly.
"We have not solved the problem, but there are many more pieces in the puzzle."
Tom Landecker, member of the CHIME Team, National Research Council
"Until now, there was only one repeated note FRB.knowing that there is another suggests there could be more there And with more repeaters and more sources available for study, we might be able to understand these cosmic puzzles ̵
The CHIME observatory has a unique design, unlike other telescopes, equipped with mobile supports that allow them to reposition and study specific objects in space, CHIME is static IME remains motionless while the sky is moving overhead. Map the entire northern hemisphere every day, which means it will probably detect more of these phenomena.
CHIME consists of 1024 cell phone receivers adapted into four 100-meter semi-cylinders, or "half-pipes", which all work together as a large interferometer. They are connected to a supercomputer that processes all the data.
The scales think that CHIME will find more repeating FRBs. Once they have been found, other telescopes can examine where they come from to find clues about their nature.
"With the CHIME mapping the entire northern hemisphere every day, we are bound to find more repeaters over time," said Stairs. "Knowing where they are will allow scientists to point their telescopes at them, creating an opportunity to study these mysterious signals in detail."
The origin of fast radio blasts is not yet known. While some scientists suggest that they are caused by catastrophic events, the discovery of repeated FRBs seems to eliminate that idea.
"We are really excited to see what CHIME can do when it runs at full capacity."
Deborah Good, PhD student at UBC, a member of the CHIME FRB team.
The rarity of FRB makes them difficult to study. They are also very transient and last only a few milliseconds. The exciting thing about this discovery is that CHIME is not yet functioning at full capacity. Once it is at speed, it will discover many more, perhaps every day of operation, and the data flow ports will open up on these intriguing phenomena.
"We are very excited to see what CHIME can do when it works at full capacity," said Deborah Good, a doctoral student in physics and astronomy at UBC who is a part of the CHIME FRB team. "At the end of the year we may have found another 1,000 bursts. Our data will interrupt some of the mysteries of the FRBs."
The first FRB was detected in 2007 by scientists who were looking for data via pulsars. Most of the fast radio explosions last for a brief moment and then they are gone, even if with this last CHIME discovery, now we know two that have been repeated. The first repeated FRB called FRB 121102 was detected in 2012, and its source was extragalactic in the direction of the Auriga constellation.
What are the wavelengths that tell us about fast radio gusts
The wave length of the FRB can help scientists understand where they came from and what kind of matter they went through to reach us. But FRB of longer wave length tells them more.
"The FRB environment has a much larger effect on the shape of signals at long wavelengths."
Deborah Good, UBC / CHIME
While most of the previous fast radios have been detected at wave lengths of a few centimeters, this last lot had wavelengths of a few meters. This is an advantage for the CHIME team, which states that longer wavelengths open new lines of inquiry.
"The FRB environment has a much larger effect on the shape of long-wavelength signals," said Good. "Seeing these explosions with CHIME will give us a good idea of how the FRBs are and where they come from, showing us more about how their brightness changes at different frequencies and what is happening to the signal on its way to Earth," he added.
Tom Landecker, a member of the CHIME team, from the National Research Council, says these barrages of newly discovered fast radios will help solve the puzzle in the end where the FRBs originate.
"[We now know] sources can produce bass Radio frequency waves and low frequency waves can escape their environment and are not too dispersed to be detected from the moment they reach the Earth. and the sources: We have not solved the problem, but there are many other pieces in the puzzle, "he said.
Whenever there is a discovery of fast radio bursts, or some other phenomenon of uncertain origins, the Internet glows with talk of aliens and extraterrestrial intelligence. We can not seem to help ourselves. But in most of these cases, and most likely also this, there is a natural explanation. Scientists have not found it yet.
But when they find the source of FRB, CHIME can play a major role in finding it.
The CHIME was only being put into service when it detected these gusts. It did not work at full capacity. Once it is, there will be some interesting times, especially if it can detect another 1,000 fast radio bursts, as Good suggests.
"The results are only the beginning of CHIME's findings," added Stairs, the UBC astrophysicist. "In the next phase, we plan to capture the full high-resolution data stream from the brighter gusts, which will allow us to better understand their positions, characteristics and magnetic environments." The coming years will be very exciting. "
detection of fast radio bursts was presented at the winter meeting of the American Astronomical Society.
These new discoveries are also explained in two scientific articles, both published in Nature online on January 9, 2019. The first document is titled "
Observations of fast radio bursts at frequencies up to 400 megahertz." The second is "A second source of repeated bursts of fast radios."
Sources:  Like this: