Scouting the spectrum for interstellar travellers
arXiv:1203.3980 · doi:10.1016/j.actaastro.2012.11.018
Abstract
Advanced civilizations capable of interstellar travel, if they exist, are likely to have advanced propulsion methods. Spaceships moving at high speeds would leave a particular signature which could be detected from Earth. We propose a search based on the properties of light reflecting from objects travelling at relativistic speeds. Based on the same principles, we also propose a simple interstellar beacon with a solar sail.
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