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    Fast Radio Bursts tagged posts

    Astronomers Shed New Light on Formation of Mysterious Fast Radio Bursts

    July 31, 2023, Categories  Astronomy/Space

    China's FAST radio telescope

    More than 15 years after the discovery of fast radio bursts (FRBs)—millisecond-long, deep-space cosmic explosions of electromagnetic radiation—astronomers worldwide have been combing the universe to uncover clues about how and why they form.

    Nearly all FRBs identified have originated in deep space outside our Milky Way galaxy. That is until April 2020, when the first Galactic FRB, named FRB 20200428, was detected. This FRB was produced by a magnetar (SGR J1935+2154), a dense, city-sized neutron star with an incredibly powerful magnetic field.

    This groundbreaking discovery led some to believe that FRBs identified at cosmological distances outside our galaxy may also be produced by magnetars...

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    Astronomers find Evidence for most Powerful Pulsar in Distant Galaxy

    June 16, 2022, Categories  Astronomy/Space

    Version Without Labels — Top Left: A giant blue star, much more massive than our Sun, has consumed, through nuclear fusion at its center, all its hydrogen, helium, and heavier elements up to iron. It now has a small iron core (red dot) at its center. Unlike the earlier stages of fusion, the fusion of iron atoms absorbs, rather than releases, energy. The fusion-released energy that has held up the star against its own weight now is gone, and the star will quickly collapse, triggering a supernova explosion. Top Right: The collapse has begun, producing a superdense neutron star with a strong magnetic field at its center (inset). The neutron star, though containing about 1.5 times the mass of the Sun, is only about the size of Manhattan...
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    Nature of Fast Radio Bursts Clarified

    August 27, 2021, Categories  Astronomy/Space

    Periodic fast radio burst found bare, unobscured by strong binary wind
    Westerbork dishes (left) detected a periodic, short fast radio burst in the blue, high-frequency radio sky. Time passed, the steady background stars turned into trails. Only much later did the same source emit in the red, low-frequency radio sky. The LOFAR telescope (right) now detected these for the first time. This chromatic behaviour shows the bursts are not periodically blocked by binary star winds. Credit: Joeri van Leeuwen

    By connecting two of the biggest radio telescopes in the world, astronomers have discovered that a simple binary wind cannot cause the puzzling periodicity of a fast radio burst after all. The bursts may come from a highly magnetized, isolated neutron star...

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    Fast Radio Bursts shown to include Lower Frequency Radio waves than previously detected

    April 21, 2021, Categories  Astronomy/Space

    Fast radio bursts shown to include lower frequency radio waves than previously detected

    A team of researchers has established that fast radio bursts (FRBs) include radio waves at frequencies lower than ever detected before, a discovery that redraws the boundaries for theoretical astrophysicists trying to put their finger on the source of FRBs.

    Since fast radio bursts (FRBs) were first discovered over a decade ago, scientists have puzzled over what could be generating these intense flashes of radio waves from outside of our galaxy. In a gradual process of elimination, the field of possible explanations has narrowed as new pieces of information are gathered about FRBs — how long they last, the frequencies of the radio waves detected, and so on.

    Now, a team led by McGill University ...

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