2021/03/04 by A. Balbi, Amedeo Balbi, Milan M. Ćirković · 1 voice
Earth and Planetary Sciences · Physics and Astronomy · #Archaeology #Astrobiology #Biology #Civilization #Computer science #Computer security #Duration (music) #Earth Systems and Cosmic Evolution #Epistemology #Extraterrestrial life #History #Key (lock) #Longevity #Philosophy #Physics #Search for extraterrestrial intelligence #Space Science and Extraterrestrial Life #astro-ph.EP #astro-ph.IM #physics.pop-ph
paper · pdf · doi:10.3847/1538-3881/abec48
arxiv published 2021/03/04 · arxiv updated 2021/03/04 · openalex publication_date 2021/04/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract It is well known that the chances of success of the search for extraterrestrial intelligence depend on the longevity of technological civilizations or, more broadly, on the duration of the signs of their existence, or technosignatures. Here, we re-examine this general tenet in more detail, and we show that its broader implications have not been given their proper significance. In particular, an often overlooked aspect is that the duration of a technosignature is in principle almost entirely separable from the age of the civilization that produces it. We propose a classification scheme of technosignatures based on their duration, and we use Monte Carlo simulations to show that, given an initial generic distribution of Galactic technosignatures, only the ones with the longest duration are likely to be detected. This tells us, among other things, that looking for a large number of short-lived technosignatures is a weaker observational strategy than focusing the search on a few long-lived ones. It also suggests abandoning any anthropocentric bias in approaching the question of extraterrestrial intelligence. We finally give some ideas of possible pathways that can lead to the establishment of long-lived technosignatures.