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Scientists have detected a "strange and persistent" radio signal that sounds like a heartbeat in a distant galaxy

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  • Scientists have detected a "strange and persistent" radio signal that sounds like a heartbeat in a distant galaxy

    Scientists have detected a "strange and persistent" radio signal that sounds like a heartbeat in a distant galaxy


    Scientists have discovered a "strange and persistent" radio signal from a far-off galaxy that sounded like a heartbeat. Astronomers at the Massachusetts Institute of Technology and elsewhere detected the signal, which is classified as a fast radio burst, or FRB — but lasted much longer.

    A typical FRB, which is a strong burst of radio waves, lasts a few milliseconds. The new signal lasted up to three seconds – about 1,000 times longer than average, according to a news release. The astrophysical origins of FRBs are unknown.

    The signal repeated over .02 seconds in a clear pattern, almost like a heartbeat.

    "It was unusual," said Daniele Michilli, a postdoc in MIT's Kavli Institute for Astrophysics and Space Research. "Not only was it very long, lasting about three seconds, but there were periodic peaks that were remarkably precise, emitting every fraction of a second — boom, boom, boom — like a heartbeat. This is the first time the signal itself is periodic."

    The signal came from a distant galaxy, several billion light-years from Earth. Researchers from MIT and McGill University in Canada, who published a study on the signal, have named it FRB 20191221A. It is currently the longest-lasting FRB with the clearest periodic pattern detected to date.

    The first FRB was discovered in 2007 and hundreds of similar radio flashes have been detected in space since.

    The Canadian Hydrogen Intensity Mapping Experiment, or CHIME, is an interferometric radio telescope that continuously observes the sky and is sensitive to fast radio bursts.

    Most FRBs are one-offs and last a few milliseconds before ending. But a signal that repeated every 16 days was recently discovered, although the signal was more random than periodic.

    But in December 2019, CHIME detected the periodic, heartbeat-like signal. Michilli was scanning the incoming data at the time. "There are not many things in the universe that emit strictly periodic signals," Michilli said.

    The source of the new FRB remains a mystery, but scientists think it could emanate from a radio pulsar or magnetar, which are neutron stars. These are dense, rapidly spinning collapsed cores of giant stars.

    "CHIME has now detected many FRBs with different properties," said Michilli. "We've seen some that live inside clouds that are very turbulent, while others look like they're in clean environments. From the properties of this new signal, we can say that around this source, there's a cloud of plasma that must be extremely turbulent."

    They hope to catch more bursts from FRB 20191221A. The detection could help them as they study the universe and neutron stars.

    "This detection raises the question of what could cause this extreme signal that we've never seen before, and how can we use this signal to study the universe," said Michilli. "Future telescopes promise to discover thousands of FRBs a month, and at that point we may find many more of these periodic signals."

    More periodic signals from this source could be used as an astrophysical clock. "For instance, the frequency of the bursts, and how they change as the source moves away from Earth, could be used to measure the rate at which the universe is expanding," the press release reads


    May we raise children who love the unloved things - the dandelion, the worm, the spiderlings.
    Children who sense the rose needs the thorn and run into rainswept days the same way they turn towards the sun...
    And when they're grown and someone has to speak for those who have no voice,
    may they draw upon that wilder bond, those days of tending tender things and be the one.

  • #2
    Fascinating. Someday we will know more.
    Not where I breathe, but where I love, I live...
    Robert Southwell, S.J.

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    • #3
      Pulsar?
      It's been ten years since that lonely day I left you
      In the morning rain, smoking gun in hand
      Ten lonely years but how my heart, it still remembers
      Pray for me, momma, I'm a gypsy now

      Comment


      • #4
        Subwoofer in Musk's launched Tesla
        If it pays, it stays

        Comment


        • #5
          Gene Krupa from the beyond.
          "Since the historic ruling, the Lovings have become icons for equality. Mildred released a statement on the 40th anniversary of the ruling in 2007: 'I am proud that Richard’s and my name is on a court case that can help reinforce the love, the commitment, the fairness, and the family that so many people, Black or white, young or old, gay or straight, seek in life. I support the freedom to marry for all. That’s what Loving, and loving, are all about.'." - Mildred Loving (Loving v. Virginia)

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          • #6
            Originally posted by Celeste Chalfonte View Post
            Gene Krupa from the beyond.
            The master

            If it pays, it stays

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            • #7
              Plural...

              We are so fucked.

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