论文标题
对33个具有快速的系外行星系统的敏感多光束靶向靶向观测值
Sensitive Multi-beam Targeted SETI Observations towards 33 Exoplanet Systems with FAST
论文作者
论文摘要
作为在地球以外寻找生命的主要方法，寻找外星智能（SETI）致力于检测技术签名，例如指示具有技术能力的生活的工程无线电信号。在本文中，我们报告了一项有针对性的SETI活动，该活动采用了一种观察策略，该策略在五百米的孔径球形射电望远镜（快速）上朝着33个已知的系外行驶系统上的观察策略（MBCM），在两种或两种元素的元素元素中，搜索ETI狭窄的频段段信号。从观测值到开普勒-438检测到的1140.604 MHz的信号最初使我们的兴趣达到顶峰，因为它的特征与假定的ETI技术签名大致一致。但是，诸如其极化特征之类的证据几乎能够消除外星人的可能性。我们的观察结果达到了前所未有的灵敏度，因为我们能够检测到达到1.48 x10^9 W的最小等效辐射功率（EIRP）。
As a major approach to looking for life beyond the Earth, the search for extraterrestrial intelligence (SETI) is committed to detecting technosignatures such as engineered radio signals that are indicative of technologically capable life. In this paper, we report a targeted SETI campaign employing an observation strategy named multi-beam coincidence matching (MBCM) at the Five-hundred-meter Aperture Spherical radio Telescope (FAST) towards 33 known exoplanet systems, searching for ETI narrow-band drifting signals across 1.05-1.45 GHz in two orthogonal linear polarization directions separately. A signal at 1140.604 MHz detected from the observation towards Kepler-438 originally peaked our interest because its features are roughly consistent with assumed ETI technosignatures. However, evidences such as its polarization characteristics are almost able to eliminate the possibility of an extraterrestrial origin. Our observations achieve an unprecedented sensitivity since the minimum equivalent isotropic radiated power (EIRP) we are able to detect reaches 1.48 x10^9 W.
