SETI launches low-frequency search for extraterrestrial technology in distant galaxies

SETI launches low-frequency search for extraterrestrial technology in distant galaxies
by Clarence Oxford
Los Angeles CA (SPX) Aug 27, 2024

The SETI Institute, in collaboration with the Berkeley SETI Research Center and the International Centre for Radio Astronomy Research, has initiated a pioneering study using the Murchison Widefield Array (MWA) in Western Australia. Led by Dr. Chenoa Tremblay of the SETI Institute and Prof. Steven Tingay of Curtin University, this research marks the first search for alien technology in galaxies beyond our own, specifically targeting low radio frequencies (100 MHz). The MWA's extensive field of view (FOV) allowed the research team to examine approximately 2,800 galaxies in a single observation, with known distances for 1,300 of these galaxies.

Traditionally, the search for extraterrestrial intelligence (SETI) has concentrated on signals originating within our galaxy. However, this new approach extends the search to distant galaxies, making it one of the most comprehensive searches for super civilizations - those more advanced than humanity. Detecting a signal from another galaxy would require a civilization with technology powerful enough to harness the energy of their sun or multiple stars in their galaxy.

"This work represents a significant step forward in our efforts to detect signals from advanced extraterrestrial civilizations," said Tremblay. "The large field of view and low-frequency range of the MWA makes it an ideal tool for this kind of research, and the limits we set will guide future studies."

Although this initial study did not detect any technosignatures (indicators of alien technology), it provides valuable insights that will inform future searches. The findings emphasize the importance of continuing to explore different radio frequencies and leveraging the unique capabilities of telescopes like the MWA.

"The MWA continues to open up new ways of exploring the Universe for intelligent civilizations and technosignatures, while using the same data to study the astrophysics of stars and galaxies. This work is new and novel, but also paves the way for future observations with even more powerful telescopes," added Tingay, who also serves as the Director of the MWA.

This research underscores the importance of international collaboration and the use of advanced technology to expand our understanding of the Universe. The SETI Institute remains committed to exploring the cosmos for signs of intelligent life and advancing our knowledge of the universe.

Research Report:An Extragalactic Widefield Search for Technosignatures with the Murchison Widefield Array