Study Maps 50K Dyson Sphere Signatures Around Red and White Dwarfs
Updated
Updated · ScienceDaily · Jul 10
Study Maps 50K Dyson Sphere Signatures Around Red and White Dwarfs
3 articles · Updated · ScienceDaily · Jul 10
Summary
A new preprint by University of Arkansas researcher Amirnezam Amiri says Dyson swarms around red and white dwarfs would be prime technosignature targets, because those stars are smaller and easier to encircle than Sun-like stars.
At about 50K, a fully energy-harvesting swarm would reradiate a star’s output in infrared rather than visible light, leaving the same luminosity but shifting the object into an unusually cold region of the H-R diagram.
0.05 to 0.3 AU orbits around red dwarfs and even tighter swarms above white dwarfs would also lack the dusty silicate signatures of ordinary disks and could produce odd, non-natural flickering as components pass by.
James Webb and WISE are well suited to test those clues; a 2024 Project Hephaistos search of roughly 5 million stars found seven candidates around red dwarfs, with one later explained by a background black hole.
Why can't astronomers rule out that five red dwarfs are surrounded by massive alien megastructures?
Are the coldest objects in the Milky Way not stars, but giant alien power stations?
If we find ancient alien tech but not its creators, what does that mean for civilization's ultimate fate?
The Hunt for Dyson Swarms: Infrared Clues and the Latest SETI Breakthroughs in the Milky Way
Overview
Recent research led by Amirnezam Amiri suggests that some of the coldest objects in the Milky Way may actually be artificial Dyson swarms—vast collections of structures built by advanced civilizations to harvest stellar energy. These swarms absorb visible light from their host stars and re-emit waste heat as infrared radiation, making them appear unusually cold and placing them in unexpected regions of the Hertzsprung–Russell diagram. Amiri's study highlights key observational clues, such as a clean infrared spectrum and irregular brightness, to help astronomers distinguish these potential alien megastructures from natural cosmic objects, guiding future searches with powerful telescopes like JWST.