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    Quasi-Periodic Pulsations tagged posts

    Microwave Imaging of Quasi-Periodic Pulsations at Flare Current Sheet

    January 5, 2023, Categories  Astronomy/Space

     Microwave emissions from the flare. The upper group is from flaring loops, and the lower group extends along reconnection current sheet. The background is an EUV image at 211 A. The gold curve represents the temporal variation curve of current sheet source at 8.4 GHz.

    Quasi-periodic pulsations (QPPs; also known as quasi-periodic oscillations, i.e., QPOs) are electromagnetic emission phenomena that vary quasi-periodically with time. They appear in celestial transient events with different temporal/spatial scales, such as stellar flares, gamma ray bursts and fast radio bursts.

    The sun, an ordinary star closest to us, is a place where flares with QPPs appear frequently...

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