Non-repeatable SETI signals due to gravity-plasma lenses of stars

Details Non-repeatable SETI signals due to gravity-plasma lenses of stars Non-repeatable SETI signals due to gravity-plasma lenses of stars

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997abos.conf..741e&link_type=abstract

Conference Paper, Astronomical and Biochemical Origins and the Search for Life in the Universe, IAU Colloquium 161, Publisher: B

Physics

Optics

Project Seti, Gravitational Lenses, Cosmic Plasma, Signal Detection, Stellar Envelopes, Receivers, Caustics (Optics)

Scientific paper

It is possible that signals from other technological societies have been received at radio listening sites on Earth, but their artifactual nature was not recognized. Such unrecognized SETI detections could come about if the amplitudes of the signals were above receiver thresholds only because of strong focusing by the compound gravity-plasma lens of a star. Variations in time and space of the plasma envelope of the star, and the temporary geometry of a star being situated directly on the line between Earth and the source result in lensed signals that may never be repeated. Perhaps the only hope of recognizing a SETI source by means of transitory lensing rests with the attainment of a detailed understanding of the characteristics of the gravity-plasma lenses of stars. These lenses produce extended focal surfaces, a semi-infinite focal line, and a single point double caustic focus, all of which vary in position and strength with the wavelength of the radiation. if the direction to a SETI source were to be determined, it might be possible to maintain the connection by use of spacecraft sent far from the sun so as to employ its gravity-plasma lens.

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