[REVISION HISTORY]
SETI high‑frequency ALMA search
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2026-07-27 18:52 UTC → 2026-07-29 03:58 UTC ·
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In late July 2026 researchers broadened expanded SETI beyond the traditional 1.4‑1.7 GHz “water‑hole”. A pre‑print by Dániel Apai, Chia‑Lung Lin and Kevin Wagner argued proposed that an advanced civilization civilizations might employ use long‑duration laser pulses as inexpensive “lighthouse” beacons, which would be more most detectable at higher frequencies. At the same time, Concurrently, Louisa Mason’s team repurposed archival ALMA Band 3 data (90‑93 GHz) to conduct for the first millimetre and sub‑millimetre millimetre‑wave technosignature survey. By analysing Their analysis of two narrow frequency windows they found revealed only terrestrial interference and no credible extraterrestrial signals. Presented at the Royal Astronomical Society’s National Astronomy Meeting, the results set new upper limits on the prevalence of powerful transmitters in the Milky Way and demonstrate Way. The work, presented at the Royal Astronomical Society’s National Astronomy Meeting, demonstrated that high‑frequency bands can be searched effectively using with existing archives. Together, A follow‑up briefing at the theoretical proposal and same meeting emphasized that re‑examining older ALMA observations—beyond the empirical survey highlight water‑hole—may already contain undetected extraterrestrial signals, reinforcing the feasibility of extending deeper, high‑frequency SETI to higher radio frequencies and suggest that deeper future observations could improve detection prospects. investigations.
Versions
- 2026-07-29 03:58 UTC SETI high‑frequency ALMA search
- 2026-07-27 18:52 UTC SETI high‑frequency ALMA search
- 2026-07-26 20:56 UTC SETI high‑frequency ALMA search
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