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    Cosmic rays tagged posts

    Researchers Capture First Images of a Radio ‘Ring of Fire’ Solar Eclipse

    October 25, 2023, Categories  Astronomy/Space

    Upper row: Radio images of the 2023 Oct. 14 solar eclipse observed by the Long Wavelength Array at the Owens Valley Radio Observatory Bottom row: Schematic representation of what visible images of the eclipse looked like at the same time Credit: Sijie Yu

    Researchers at New Jersey Institute of Technology’s Center for Solar-Terrestrial Research (NJIT-CSTR) have captured the Oct. 14 solar eclipse in a way never seen before — recording the first radio images of an annular eclipse’s famous “ring of fire” effect.

    The eclipse was partially visible to much of the continental U.S. for several hours that Saturday, though the full “ring of fire” effect was only visible for less than five minutes, and only for those within its 125-mile-wide path of annularity.

    However, the new observations o...

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    A Neutrino Portrait of our Galaxy reveals High-Energy Particles from within the Milky Way

    July 4, 2023, Categories  Astronomy/Space

    Five views of the Milky Way: the top two bands show visible light and gamma rays, while the lower three show expected and real neutrino results, plus a measure of the significance of neutrino events detected by IceCube. IceCube Collaboration

    Our Milky Way galaxy is an awe-inspiring feature of the night sky, viewable with the naked eye as a hazy band of stars stretching from horizon to horizon.

    For the first time, the IceCube Neutrino Observatory in Antarctica has produced an image of the Milky Way using neutrinos—tiny, ghost-like astronomical messengers.

    In research published June 29 in the journal Science, the IceCube Collaboration—an international group of more than 350 scientists—presents evidence of high-energy neutrino emission coming from the Milky Way.

    We have not...

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    Astronomers find Cosmic Rays driving Galaxy’s Winds

    October 26, 2022, Categories  Astronomy/Space

    Credit: Institute for Research in Fundamental Sciences- IPM & European Southern Observatory (ESO)

    Astronomers using the National Science Foundation’s Karl G. Jansky Very Large Array (VLA) have discovered an important new clue about how galaxies put the brakes on vigorous episodes of star formation. Their new study of the neighboring galaxy M33 indicates that fast-moving cosmicray electrons can drive winds that blow away the gas needed to form new stars.

    Such winds are responsible for slowing the rate of star formation as galaxies evolve over time. However, shock waves from supernova explosions and energetic, black hole-powered jets of material coming from galactic cores have been considered the primary drivers of those winds...

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    Astronomers confirm Star Wreck as Source of Extreme Cosmic Particles

    August 15, 2022, Categories  Astronomy/Space

    This sequence compares Fermi results in three energy ranges. Pulsar J2229+6114 is the brilliant source at the top, the northern tip of supernova remnant G106.3+2.7 (outlined in green). In each energy range, the sequence first shows the number of gamma rays and then the excess amounts compared with expectations from a model of the background. Brighter colors indicate greater numbers of gamma rays or excess amounts. At the highest energies, a new source of gamma rays emerges, produced when protons accelerated by the supernova’s shock wave strike a nearby gas cloud.
    Credit: NASA/Fermi/Fang et al. 2022

    Astronomers have long sought the launch sites for some of the highest-energy protons in our galaxy...

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