Small-scale filament eruptions as the driver of X-ray jets in solar coronal holes

摘要: A study of the formation X-ray jets in solar coronal holes suggests that this process does not follow popular ‘emerging-flux’ model, but instead results from a minifilament eruption akin to larger-scale filament eruptions drive larger flares and mass ejections. Transient, jetting structures are common Sun's atmosphere. The hottest these corona, which widely thought occur when new compact magnetic bipoles emerge below surface reconnect with an ambient, nearly radial field. In test 'emerging-flux' Alphonse Sterling et al. report high-resolution extreme-ultraviolet observations 20 randomly selected polar holes. They find each jet, contrary emerging-flux jet-producing reconnection is driven by minifilaments resembling filaments flares. Solar be made burst closed field at base jet ambient open field1,2. accepted version such occurs plasma current sheet between emerging field, also forms localized brightening usually observed edge jet’s base1,3. Here we form Sun’s poles. miniature initiate ejections4,5,6,7 drives reconnection. bright point ‘legs’ minifilament-carrying erupting analogous eruptions. Previous have found some base-field eruptions8,9,10,11, only one study, provisionally questioned model12. Our support view formed fundamental explosive on vast range scales, biggest ejections flare down jets, perhaps even smaller may power heating10,13,14. similar scenario has previously been suggested, was inferred different based origin minifilament15.