论文标题
使用Murchison广场阵列对Vela区域的SETI调查：搜索空间中的数量级扩展。
A SETI Survey of the Vela Region using the Murchison Widefield Array: Orders of Magnitude Expansion in Search Space
论文作者
论文摘要
遵循我们以前的低频搜索对外星智能（SETI）的结果，使用Murchison广场阵列（MWA），针对银河系中心和猎户座分子云（银河系抗体），我们报告了对远低于MWA的最低上限的Vela区域的新大规模调查。在17小时内使用MWA在98-128 MHz的频率范围内，观察到以10 kHz的频率分辨率观察到以Vela Supernova残留为中心的$ \ sim $ 400度$^2 $场。在该领域内有六个已知的系外行星。在这些系外行星的位置，我们搜索了与智能文明的无线电传输一致的狭窄频段信号。没有发现未知的信号，具有5sigma检测阈值。总的来说，在这项工作中，加上我们之前的两项调查，我们现在以低频检查了75个已知的系外行星。除了已知的系外行星外，我们还包括在分析中计算有效的各向同性辐射功率（EIRP）上限，朝着Vela领域中超过1000万个恒星源的上限，并具有距盖亚（Gaia）已知距离（假设10 kHz传输带宽）。
Following the results of our previous low frequency searches for extraterrestrial intelligence (SETI) using the Murchison Widefield Array (MWA), directed toward the Galactic Centre and the Orion Molecular Cloud (Galactic Anticentre), we report a new large-scale survey toward the Vela region with the lowest upper limits thus far obtained with the MWA. Using the MWA in the frequency range 98-128 MHz over a 17 hour period, a $\sim$400 deg$^2$ field centred on the Vela Supernova Remnant was observed with a frequency resolution of 10 kHz. Within this field there are six known exoplanets. At the positions of these exoplanets, we searched for narrow band signals consistent with radio transmissions from intelligent civilizations. No unknown signals were found with a 5sigma detection threshold. In total, across this work plus our two previous surveys, we have now examined 75 known exoplanets at low frequencies. In addition to the known exoplanets, we have included in our analysis the calculation of the Effective Isotropic Radiated Power (EIRP) upper limits toward over 10 million stellar sources in the Vela field with known distances from Gaia (assuming a 10 kHz transmission bandwidth).
