论文标题
对大滤镜的观察限制
Observational Constraints on the Great Filter
论文作者
论文摘要
搜索具有下一代太空望远镜的光谱生物签名可能会在具有生命迹象的外部球星上提供观察性的限制。该系外行星的这种光谱表征的扩展是寻找技术的观察证据，称为技术签名。当前可以观察到从紫外线到近红外波长的生物签名的任务概念可能会在托管寿命的银河系中的行星的比例上置于上限，尽管这种任务往往具有相对有限的限制，从而限制了在中红外波长下技术签名的普遍性。然而，寻找技术签名与生物签名一起将提供有关我们文明未来的重要知识。如果具有技术签名的行星很丰富，那么我们就可以提高信心，即行星演变中最艰难的一步 - 伟大的滤镜 - 可能是我们过去的过去。但是，如果我们发现生活在缺乏技术签名的同时生活很普遍，那么这将增加伟大的过滤器等待将来挑战我们的可能性。
The search for spectroscopic biosignatures with the next-generation of space telescopes could provide observational constraints on the abundance of exoplanets with signs of life. An extension of this spectroscopic characterization of exoplanets is the search for observational evidence of technology, known as technosignatures. Current mission concepts that would observe biosignatures from ultraviolet to near-infrared wavelengths could place upper limits on the fraction of planets in the galaxy that host life, although such missions tend to have relatively limited capabilities of constraining the prevalence of technosignatures at mid-infrared wavelengths. Yet searching for technosignatures alongside biosignatures would provide important knowledge about the future of our civilization. If planets with technosignatures are abundant, then we can increase our confidence that the hardest step in planetary evolution--the Great Filter--is probably in our past. But if we find that life is commonplace while technosignatures are absent, then this would increase the likelihood that the Great Filter awaits to challenge us in the future.
