Wind Power as a Technosignature on M-dwarf Planets

TL;DR

This paper proposes that large-scale wind turbines on M-dwarf planets could generate detectable technosignatures through infrared emissions and shock waves, serving as indicators of extraterrestrial technological activity.

Contribution

It introduces the novel idea that wind turbine deployment in hypersonic planetary atmospheres could produce observable technosignatures, expanding the scope of extraterrestrial detection methods.

Findings

Wind turbines could produce infrared radiation detectable from afar.

Shock waves from turbines could serve as technosignatures.

Hypersonic wind environments on exoplanets may host detectable technological activity.

Abstract

We suggest that the large-scale deployment of wind turbines on an M-dwarf planet could produce observable technosignatures. Motivated by observations of hypersonic wind velocities on WASP-127 b, we note that the atmospheres of such planets could serve as vast reservoirs of energy for an extraterrestrial civilization. A large-scale deployment of wind turbines in a hypersonic environment would produce heated shock waves in the hypersonic stream, cause strong frictional heating from the rotation of the blades, and be a source of infrared radiation. We mention possible scenarios that could lead to the deployment of wind turbines on a gas giant and also note that similar features could exist on terrestrial M-dwarf planets. The idea that aerodynamic peculiarities could be a technosignature is worth keeping in mind as ground- and space-based exoplanet observations continue to improve.