[space]Scientists say these are the best stars to search for a Dyson sphere around

[Harper84]

A new study out of the University of Arkansas has laid out a four test checklist for spotting one of the most famous hypothetical alien megastructures, a Dyson sphere, timed to the 2026 convergence of the James Webb Space Telescope, the newly operational Vera C. Rubin Observatory, and the upcoming Roman Space Telescope. The study finds that red dwarfs and white dwarfs are the most promising targets to examine

The reasoning is fairly intuitive once explained, these smaller, cooler stars would make it comparatively easier for an advanced civilization to build energy harvesting structures around them, since a Dyson swarm could orbit just a few million kilometers above a white dwarf's surface, dramatically reducing the engineering scale needed compared to a star like our own sun

The key observational signature is infrared glow. Any structure absorbing a meaningful fraction of a star's light for energy would necessarily re-radiate a lot of that captured energy as waste heat, showing up as excess infrared emission that would not otherwise be expected, along with a lack of the dusty spectral signatures typical of ordinary stars and possibly unusual flickering

This kind of work does not require actually finding anything to be valuable, since it gives astronomers a genuinely testable, falsifiable framework for where to point telescopes rather than searching essentially at random. A prior search already flagged several red dwarf candidates worth closer study, and this new checklist gives researchers a more rigorous way to separate genuine technosignatures from ordinary astrophysical phenomena

The galaxy's coldest "stars" may actually be alien megastructureswww.sciencedaily.com

[Rob72]

Red dwarfs and white dwarfs being the more tractable targets makes total sense once you think about the actual engineering scale involved for any civilization attempting this