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Observational Signals of Self-Destructive Civilisations
(08-13-2015, 08:58 PM)stevebowers Wrote: The most significant signals emitted by a dying OA-scale civilisation would be visible from many gigalight years. Artificial supernovae as detonated by Verifex (and, I seem to remember, on other occasions by other parties) would be the brightest events, I think; they could probably be distinguished by their light-curves and spectroscopic characteristics - for a start, it would be practically impossible for a sun-like star to explode normally without some sort of artificial help.

Another event that would be detectable from a long way away, but not quite so bright, would be an attack by a Nicoll-Dyson laser; a planet or megastructure would suddenly flare up to sun-like brightness. Or a collision between two megastructures would release a lot of energy, as would the destruction of a dynamic megastructure such as a suprasphere and the release of its kinetic energy. The release of energy would be relatively slow, but could be long lasting and produce a lot of visible debris.

This. Taking the idea a little further, I imagine that the detonations of metric weapons of one sort or another might have quite distinctive signatures.

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RE: Observational Signals of Self-Destructive Civilisations - by iancampbell - 08-14-2015, 08:20 AM

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