On Detecting Interstellar Scintillation in Narrowband Radio SETI
On Detecting Interstellar Scintillation in Narrowband Radio SETI
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DOI：
10.3847/1538-4357/acdee0
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发表时间：
2023-07
期刊：
影响因子：
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通讯作者：
Bryan Brzycki;A. Siemion;I. de Pater;J. Cordes;V. Gajjar;B. Lacki;Sofia Z. Sheikh
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文献类型：
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作者：
Bryan Brzycki;A. Siemion;I. de Pater;J. Cordes;V. Gajjar;B. Lacki;Sofia Z. Sheikh
迄今为止，无线电技术特征的搜索集中在天空位置，作为技术特征候选人和人为射频干扰（RFI）之间的主要判别因素。在这项工作中，我们调查的可能性，通过确定的存在和性质所产生的湍流，电离等离子体的星际介质的强度flattillations寻找technosignatures。过去的工作已经详细说明了星际散射如何增强和减弱窄带无线电信号的可探测性。我们使用NE2001银河系自由电子密度模型来估计闪烁的时间尺度，窄带信号搜索将是敏感的，并讨论了如何在实际中，我们可能会检测到的信号中的强强度闪烁。我们进一步分析了罗伯特C。伯德绿色银行望远镜与拟议的方法和评论的可行性使用闪烁作为过滤器的技术签名的候选人。
To date, the search for radio technosignatures has focused on sky location as a primary discriminant between technosignature candidates and anthropogenic radio frequency interference (RFI). In this work, we investigate the possibility of searching for technosignatures by identifying the presence and nature of intensity scintillations arising from the turbulent, ionized plasma of the interstellar medium. Past works have detailed how interstellar scattering can both enhance and diminish the detectability of narrowband radio signals. We use the NE2001 Galactic free electron density model to estimate scintillation timescales to which narrowband signal searches would be sensitive, and discuss ways in which we might practically detect strong intensity scintillations in detected signals. We further analyze the RFI environment of the Robert C. Byrd Green Bank Telescope with the proposed methodology and comment on the feasibility of using scintillation as a filter for technosignature candidates.