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Related Experiment Video

Updated: Jun 11, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

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Published on: August 12, 2013

Searching for cost-optimized interstellar beacons.

Gregory Benford1, James Benford, Dominic Benford

  • 1Physics and Astronomy Department, University of California Irvine, Irvine, California, USA.

Astrobiology
|July 14, 2010
PubMed
Summary
This summary is machine-generated.

Cost-conscious extraterrestrial civilizations may build interstellar beacons with unique transmission strategies. Future Search for Extraterrestrial Intelligence (SETI) efforts should adapt to detect these intermittent, rapidly scanning signals.

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Area of Science:

  • Astrobiology
  • Astronomy
  • Signal Processing

Background:

  • The Search for Extraterrestrial Intelligence (SETI) traditionally assumes specific transmitter designs.
  • Previous work explored cost-optimal interstellar beacon construction for a fixed far-field power density.

Purpose of the Study:

  • To investigate the characteristics of hypothetical SETI beacon transmitters built by cost-conscious extraterrestrial civilizations.
  • To propose new search strategies for detecting such beacons.

Main Methods:

  • Analysis of economic pressures on extraterrestrial beacon builders.
  • Consideration of factors like cost, spectral lines near 1 GHz, and interstellar scintillation.
  • Modeling of rapid scanning transmission strategies across the galactic plane.

Main Results:

  • Cost and physical constraints favor transmission frequencies above the traditional "water hole".
  • Optimal strategies involve rapid scans of the galactic plane, resulting in infrequent, intermittent pulses.
  • Beacons from advanced, wealthy societies may differ significantly from current SETI targets.

Conclusions:

  • Future SETI searches require new strategies to detect intermittent, rapidly scanning beacons.
  • Special attention should be given to areas along the galactic disk with previously detected but non-recurring signals.
  • A new beacon test based on the Life Plane hypotheses is proposed.