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1 results

  • Sub-THz emission from stellar flares and energy release diagnostics

  • Yuriy T. Tsap, Alexander V. Stepanov, Victor F. Melnikov
  • Journal:
    Proceedings of the International Astronomical Union / Volume 19 / Issue S365 / December 2023
    Published online by Cambridge University Press:
    23 December 2024, pp. 409-413
    Print publication:
    December 2023
    • Article
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  • A comparative analysis of sub-THz emission of stellar flares from red dwarfs has been carried out. ALMA observations indicate that the sub-THz emission flux from stellar flares with a duration of 10 s is an order of magnitude greater than for solar flares. The sub-THz emission is linearly polarized and decreases with frequency. The degree of polarization can reach tens of percent. We show that these types of spectrum slopes and linear polarization can be caused by the synchrotron emission of ultrarelativistic electrons. The origin of the observed relationships between sub-THz, low frequency radio, and X-ray emissions of stellar flares are discussed.