Dipartimento di Fisica, Università degli Studi di Roma "Tor Vergata," Roma, Italy .
Astrobiology. 2018 Jan;18(1):54-58. doi: 10.1089/ast.2017.1652. Epub 2018 Jan 3.
We used a statistical model to investigate the detectability (defined by the requirement that causal contact has been initiated with us) of communicating civilizations within a volume of the Universe surrounding our location. If the civilizations are located in our galaxy, the detectability requirement imposes a strict constraint on their epoch of appearance and their communicating life span. This, in turn, implies that our ability to gather empirical evidence of the fraction of civilizations within range of detection strongly depends on the specific features of their temporal distribution. Our approach illuminates aspects of the problem that can escape the standard treatment based on the Drake equation. Therefore, it might provide the appropriate framework for future studies dealing with the evolutionary aspects of the search for extraterrestrial intelligence (SETI). Key Words: Astrobiology-Extraterrestrial life-SETI-Complex life-Life detection-Intelligence. Astrobiology 18, 54-58.
我们使用一个统计模型来研究在我们所处位置周围的宇宙体积内可探测到的（由与我们接触的因果关系的起始所定义）文明的通信能力。如果这些文明位于我们的星系中，那么可探测性要求对它们的出现时代和通信寿命施加了严格的限制。这反过来又意味着，我们收集可探测范围内文明分数的经验证据的能力强烈取决于它们时间分布的具体特征。我们的方法揭示了一些可能会逃避基于德雷克方程的标准处理的问题方面。因此，它可能为未来研究外星智能（SETI）的搜索的进化方面提供了适当的框架。关键词：天体生物学-外星生命-SETI-复杂生命-生命探测-智能。天体生物学 18,54-58。
