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Showing 1–5 of 5 results
Advanced filters: Author: V. A. Acciari Clear advanced filters

  • A multi-frequency observing campaign of the γ-ray burst GRB 190114C reveals a broadband double-peaked spectral energy distribution, and the teraelectronvolt emission could be attributed to inverse Compton scattering.

    • V. A. Acciari
    • S. Ansoldi
    • D. R. Young
    Research
    Nature
    Volume: 575, P: 459-463

  • Detection of the 2021 outburst of the nova RS Oph in very-high-energy gamma rays by the MAGIC telescopes is reported. Investigation of the gamma-ray emission provides evidence for acceleration of protons within the nova shock, which then propagate outwards to create bubbles of enhanced cosmic ray density.

    • V. A. Acciari
    • S. Ansoldi
    • P. Valisa
    Research
    Nature Astronomy
    Volume: 6, P: 689-697

  • Observations of teraelectronvolt-energy γ-rays starting about one minute after the γ-ray burst GRB 190114C reveal a distinct component of the afterglow emission with power comparable to the synchrotron emission.

    • V. A. Acciari
    • S. Ansoldi
    • L. Nava
    Research
    Nature
    Volume: 575, P: 455-458

  • Cosmic rays are believed to be mainly accelerated by the winds and supernovae of massive stars, although definite evidence for this is lacking. The active regions of starburst galaxies have exceptionally high rates of star formation, and therefore should produce cosmic rays that interact with interstellar gas and radiation to produce diffuse γ-rays. The detection and analysis of >700-GeV γ-rays from M82, the prototype small starburst galaxy, now links cosmic-ray acceleration to star formation activity.

    • V. A. Acciari
    • E. Aliu
    • B. Zitzer
    Research
    Nature
    Volume: 462, P: 770-772