2023-12-15 09:39:31
Astronomers found that the frequency of the central core of the “FRB 20220912A” burst dropped significantly, like a “sliding whistle” of a celestial body. Picture: taken from Twitter @scienceworld224
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According to a report by CNN, astronomers published a study in the Monthly Notices of the Royal Astronomical Society on the 13th, saying that they discovered a newly discovered fast radio burst (FRB) signal. A strange pattern they had never seen before made them very curious regarding the cause of this pattern.
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Fast radio bursts (FRBs) are one of the many microwave and radio signals in the universe. They contain powerful energy and the duration of each burst is extremely short.
Researchers used the Allen Telescope Array (ATA) of the SETI Institute in California to detect this FRB signal burst. The team detected 35 FRBs numbered “FRB 20220912A” from the same source within two months. ” FRB signal.
At first, “FRB 20220912A” appeared to be similar to other known FRB signals, with each detected burst shifting from higher to lower frequencies. But later researchers found that the core frequency of the “FRB 20220912A” explosion dropped significantly, like a celestial body’s “sliding whistle.” The researchers then converted the FRB signal into xylophone notes and found that the drop would be more obvious, with high notes corresponding to the beginning of the burst and low notes corresponding to the end.
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The researchers compared “FRB 20220912A” with other FRB signals, but were unable to find the exact same pattern as “FRB 20220912A” in other signals. Lead researcher Dr. Sofia Sheikh said in a statement, “This work is exciting because it (FRB 20220912A) not only confirms the properties of the known FRB signal, but also discovers new properties on top of them. .
Astronomers suspect that some FRB signals may come from “magnetars,” the strongly magnetized cores of “Death Stars.” But other research suggests that collisions between compact neutron stars, or dead stars called white dwarfs, might also be responsible. “We are narrowing down the sources of FRBs to extreme objects such as magnetars, but no existing model can explain all the properties observed so far,” Dr Sheikh said.
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