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How ‘Space Weather’ May Cause Alien Signals to Get Lost in Space
Stellar plasma turbulence near transmitting planets spreads alien signals across frequencies, reducing detection likelihood, especially around M-dwarf stars that make up 75% of the Milky Way.
- Researchers from the SETI Institute published a study in The Astrophysical Journal finding stellar activity and plasma turbulence near transmitting planets can broaden ultra-narrow signals, potentially hiding them from Earth searches.
- Plasma fluctuations near stars can distort and 'smear' radio waves, and the team calibrated this broadening using solar-system probe data before extrapolating to other stellar environments.
- Because many surveys scan for razor-thin tones, SETI experiments and search pipelines may miss broader, fainter signals from M-dwarf stars, which constitute about 75% of stars.
- The team recommends revising search pipelines and target selection because broadened signals can slip below detection thresholds, with the study noting this impacts detection of signals from active stars.
- The research team's practical framework estimates how 'space weather' from transmitting planets and their star systems may cause signals to slip below detection thresholds, potentially helping explain some of the radio silence, said Dr. Vishal Gajjar.
18 Articles
18 Articles
SETI admits its search for ET may be too narrowly focussed
Solar winds near aliens’ homes – and ours – might be blowing away signs of alien technosignatures by broadening signals The SETI Institute, the nonprofit that conducts a search for extraterrestrial intelligence by examining radio waves for artefacts that are unlikely to be the result of natural processes, thinks it may have been going about it the wrong way.…
A research by the Institute Seti funded by the Nasa: "The radio signals transmitted by the cosmos disturbed by the storms in space." If E.T. calls home and no one answers is the fault of the "maltempo..."
Astronomers suggest that space weather in other planetary systems may affect the detection of signals that could be emitted by an advanced alien civilization. The article, "Space weather in other planetary systems may hinder the detection of signals from alien civilizations," comes from the website Everything That Matters.
The Hidden Reason Alien Signals May Be Invisible
A new analysis has delivered one of the most disruptive findings in technosignature research in years. The study shows that a narrowband radio signal leaving an exoplanet does not travel through empty space. It must first pass through the turbulent environment surrounding its host star. That environment is violent, dense, and unpredictable. It reshapes a […] The post The Hidden Reason Alien Signals May Be Invisible appeared first on Above The No…
Researchers at the SETI Institute have just published a study that could explain why, after decades of listening, no extraterrestrial radio signals have always been received. The space weather around the stars would blur transmissions before they even left their original system. And 75% of the stars of the Milky Way would be affected. So, the space weather blurs the tracks The study, published in The Astrophysical Journal, starts from a rather s…
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