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    millisecond pulsar tagged posts

    Lightest Black Hole or Heaviest Neutron Star? MeerKAT Uncovers a Mysterious Object in Milky Way

    January 23, 2024, Categories  Astronomy/Space

    An artist’s impression of the system assuming that the massive companion star is a black hole. The brightest background star is its orbital companion, the radio pulsar PSR J0514-4002E. The two stars are separated by 8 million km and circle each other every 7 days.
    Credit: Daniëlle Futselaar (artsource.nl)

    An international team of astronomers have found a new and unknown object in the Milky Way that is heavier than the heaviest neutron stars known and yet simultaneously lighter than the lightest black holes known.

    Using the MeerKAT Radio Telescope, astronomers from a number of institutions including The University of Manchester and the Max Planck Institute for Radio Astronomy in Germany found an object in orbit around a rapidly spinning millisecond pulsar located around 40,000 ligh...

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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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