论文标题
寻找150 MHz的银河中心的技术签名
A Search for Technosignatures toward the Galactic Centre at 150 MHz
论文作者
论文摘要
本文是一系列低频搜索技术签名的第四篇。使用Murchison广场阵列两晚，我们将7个小时的数据集成到银河中心（以射手座A*的位置为中心），总面积为200 deg^2。我们提出了针对144个系外行星系统的有针对性搜索，该系统是我们最好但角度分辨率的（75个弧秒）。这是第一次以155 MHz向银河中心（我们以前的中心频率较低）为155 MHz的技术签名搜索。盲目的搜索朝着银河系中心和银河凸起的300万颗恒星也完成，在距离银河中心的距离处的等效各向同性功率极限<1.1x10^19W。未检测到合理的技术签名。
This paper is the fourth in a series of low-frequency searches for technosignatures. Using the Murchison Widefield Array over two nights we integrate 7 hours of data toward the Galactic Centre (centred on the position of Sagittarius A*) with a total field-of-view of 200 deg^2. We present a targeted search toward 144 exoplanetary systems, at our best yet angular resolution (75 arc seconds). This is the first technosignature search at a frequency of 155 MHz toward the Galactic Centre (our previous central frequencies have been lower). A blind search toward in excess of 3 million stars toward the Galactic Centre and Galactic bulge is also completed, placing an equivalent isotropic power limit <1.1X10^19W at the distance to the Galactic Centre. No plausible technosignatures are detected.
