Upon closer inspection of a mysterious galaxy 12 million light-years away, scientists received a strange impression of Teja Woo.
Frequent flash flashes, also known as fast radio bursts (FRB), look just as amazing as the flashes on the Grab Nebula. The Crab Nebula is the remnant of an ancient star eruption, or SupernovaObserved by humans in 1054 AD and recorded by many different cultures. The researchers said the colorful remnants showed bright, brilliant flashes similar to the newly discovered FRBs found in galaxy M81.
“Some of the signals we measure are very short and strong, just like some of the signals from the cancer pulsar,” said Kinsey Nemo, Ph.D. Study of astronomy at the Netherlands Institute of Radio Astronomy and at the University of Amsterdam in the Netherlands; Thus he said in the statement.
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The eruption took place in what is now known as the Grab Nebula Recorded On July 4, 1054, Chinese astronomers spotted a new or “guest” star above the southern horn of Taurus. Astronomers recorded that the “guest” shone in the sky for 23 days and was 6 times brighter than Venus. It was visible about two years after the eruption and was recorded by Arab and Japanese astronomers.
The rest are clearly visible through a telescope, meaning that the remaining nebula was first observed in 1731 by the British astronomer John Beavis. French astronomer Charles Messier 27 years later he independently observed it, describing the nebula as Messier 1 or M1, and added it to the list of now popular Messier objects.
It was not until the 1960s that astronomers noticed that an oscillating radio source matched the location of the Crab Nebula, eventually concluding that the signal had arrived. PulsarA type of neutron star (the densest stellar body left by a supernova) has a strong magnetic field.
But despite the known cause of the eruptions of the Crab Nebula and their similarities with those found on M81, astronomers are still unsure of what is happening on M81. These FRBs first came in January 2020 from the direction of the galaxy Ursa Major, the Great Tipper.
So far, FRBs are mostly found in galaxies inhabited by young stars, but M81 views are an exception because the network of dozens of radio sources has very clearly identified the source of the signal for an ancient galaxy called the Global Cluster. . .
A candidate for describing FRBs, these bright flashes come from Magnetism The most powerful magnet in the universe and another type of supernova remnant. This explanation makes sense where young stars are common, but the researchers said it could be more challenging when it comes to the M81.
“We expect magnetic stars to be bright and new, and certainly not surrounded by old stars,” Jason Hessels of the University of Amsterdam and Astron said in a statement. “If what we see here is really a magnet, it could not have formed from the eruption of a young star. There must be another way.”
One possible explanation might be that file White dwarf (Cooling core of a large burning star) It extracts gas from the unfortunate neighboring star. Over time, researchers believe, the extra mass may have caused the white dwarf to slide into a magnet.
Finally, although scientists do not know what the signal is or why it looks like it is coming out of a crab nebula, their answer is something unusual – whether it is an abnormal magnet, an extraordinary pulsar, or another celestial phenomenon.
The research was published in two papers on Wednesday (February 23): One Natural astronomy Led by Nemo et al Natural It was chaired by Franz Kirsten of Salmers University of Technology and the Netherlands Institute of Radio Astronomy.
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