A Neutrino Beacon
Observational SETI has concentrated on using electromagnetism as the carrier , namely radio waves and laser radiation. Michael Hippke [2] has pointed out that it may be possible to use neutrinos or gravitational waves as signals. Gravitational waves demand the command of the generation of very large scale amounts of energy, Jackson and Benford [3]. This paper describes a beacon that uses beamed neutrinos as the signal. Neutrinos, like gravitational waves, have the advantage of extremely low extinction in the interstellar medium. To make use of neutrinos an advanced civilization can use a gravitational lens as a focus and amplifier. The lens can be a neutron star or a black hole. Using wave optics one can calculate the advantage of gravitational lensing for amplification of a beam and along the optical axis it is exceptionally large. Even though the amplification is very large the dimeter of the beam is quite small, less that a centimeter. This implies that a large constellation of neutrino transmitters would have to enclose the local neutron star or black hole to cover the sky. This means that such a beacon would have to be built by a Kardashev Type II civilization.
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A. A. Jackson (edit)
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05/14/19 06:06PM
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StarshipBuilder: A Neutrino Beacon https://t.co/gXap4feZdw
fcain: Advanced civilizations could be communicating with neutrino beams. Transmitted by clouds of satellites around neutron stars or black holes - https://t.co/HxCbB4BQ2q https://t.co/QBhkM3ixqv
scimichael: A Neutrino Beacon "Observational SETI has concentrated on using electromagnetism as the carrier , namely radio waves and laser radiation." https://t.co/HnjvGVck87
AsteronX: RT @qraal: [1905.05184] A Neutrino Beacon https://t.co/pIQqaZ3oxe
qraal: [1905.05184] A Neutrino Beacon https://t.co/pIQqaZ3oxe
StarshipBuilder: A Neutrino Beacon https://t.co/gXap4feZdw "To make use of neutrinos an advanced civilization can use a gravitational lens as a focus and amplifier. The lens can be a neutron star or a black hole."
SuperASASSN: "A Neutrino Beacom"? https://t.co/wzi0Ld3bSU alas, no, "A Neutrino Beacon" :)
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