Space Weather Around Distant Stars Could Distort Extraterrestrial Radio Signals, Study Finds

To the point

Gajjar and Brown show that space weather from stars—stellar winds and coronal mass ejections—can distort and broaden radio signals from distant civilizations, with about 70% of sun-like stars widening signals by more than 1 Hz and 30% by more than 10 Hz at 1 GHz (red dwarfs being more affected), and CMEs potentially broadening by over 1000 Hz, so SETI searches should account for dispersion and Doppler drift and could be aided by instruments and projects such as the Allen Telescope Array and SETI@home.