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    Black Widow Pulsar tagged posts

    NASA’s Fermi Detects First Gamma-Ray Eclipses from ‘Spider’ Star Systems

    January 27, 2023, Categories  Astronomy/Space

    Streams of material blow off an orange-yellow in the foreground. In the distance, a pulsar rotates like a lighthouse, emitting beams of magenta light. The background is black, purple, and speckled with stars.
    An orbiting star begins to eclipse its partner, a rapidly rotating, superdense stellar remnant called a pulsar, in this illustration. The pulsar emits multiwavelength beams of light that rotate in and out of view and produces outflows that heat the star’s facing side, blowing away material and eroding its partner.
    Credits: NASA/Sonoma State University, Aurore Simonnet

    Scientists have discovered the first gamma-ray eclipses from a special type of binary star system using data from NASA’s Fermi Gamma-ray Space Telescope. These so-called spider systems each contain a pulsar—the superdense, rapidly rotating remains of a star that exploded in a supernova—that slowly erodes its companion.

    An international team of scientists scoured over a decade of Fermi observations to find seven sp...

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    Plasma Lensing discovered in Black Widow Pulsar

    December 31, 2021, Categories  Astronomy/Space

    The upper panel shows the total intensity of pulse emission vs. pulsar spin and orbital phase
    s with the sub-integration of 1 s of PSR J1720-0533. Enlargements of the ingress and egress of the pulsar are shown in the middle left and middle right panels, respectively. The bottom panels show the pulse flux density variations near the eclipse. (Image by XAO)

    Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), a research team led by Dr. Wang Shuangqiang from the Xinjiang Astronomical Observatory (XAO) of the Chinese Academy of Sciences discovered plasma lensing phenomenon in a black widow pulsar PSR J1720-0533.

    Black widow pulsar systems have a low-mass companion star in a compact orbit with a millisecond pulsar...

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