Stellar Wind Turbulence and Orbital Modulation Blur Narrowband Technosignatures, Highlighting the Need for Broader Detection Strategies

To the point

A narrow radio signal from an exoplanet would be distorted as it passes through a star’s turbulent wind—especially around active M dwarfs—turning a clean spike into a broader, weaker feature that can fall below detection thresholds or resemble background noise, with detectability further modulated by the transmitter’s orbit and space weather events like coronal mass ejections, so many searches may miss real technosignatures that aren’t ultra-narrow.