用全球低成本无线电接收机阵列搜索来自Milky Way的千兆Jansky快速射电暴
Searching for giga-Jansky fast radio bursts from the Milky Way with a global array of low-cost radio receivers
摘要：
如果快速射电暴（FRB）起源于宇宙学距离的星系，那么它们的全天速率意味着银河系可能平均每30-1500年发生一次FRB。如果FRB重复数十年或数百年，则本地FRB现在可能是活跃的。一个典型的银河系FRB会产生一个毫秒级的无线电脉冲，其通量密度为~ 3E 10 Jy，相当于蜂窝通信设备（手机，Wi-Fi，GPS）的无线电通量水平和频率。我们建议使用全球低成本无线电接收器阵列来搜索银河系FRB。一种可能性是通过Citizens-Science可下载的应用程序在蜂窝电话中使用~1GHz通信信道。参与的手机将持续监听和记录候选FRB，并定期将信息上传到中央数据处理网站，该网站将来自所有参与者的传入数据相关联，以识别来自天文距离的真实的，全球性的FRB的签名。从不同位置报告的基于GPS的脉冲到达时间的三角测量将提供FRB天空位置，可能达到弧秒精度。来自以不同频率工作的电话的脉冲到达时间，或者来自设备上的去色散搜索的脉冲到达时间，将产生色散测量（DM），这将指示银河系内的FRB源距离。这种方法的一个变体是使用手机中内置的~100 MHz FM无线电接收器，以较低频率进行FRB搜索。或者，许多“软件定义无线电”（SDR）设备，每个成本约为10美元，可以插入世界各地（特别是在无线电安静地区）的个人电脑的USB端口，以建立全球接收器网络。
英文摘要：
If fast radio bursts (FRBs) originate from galaxies at cosmological distances, then their all-sky rate implies that the Milky Way may host an FRB on average once every 30-1500 years. If FRBs repeat for decades or centuies, a local FRB could be active now. A typical Galactic FRB would produce a millisecond radio pulse with ~1 GHz flux density of ~3E10 Jy, comparable to the radio flux levels and frequencies of cellular communication devices (cell phones, Wi-Fi, GPS). We propose to search for Galactic FRBs using a global array of low-cost radio receivers. One possibility is to use the ~1GHz communication channel in cellular phones through a Citizens-Science downloadable application. Participating phones would continuously listen for and record candidate FRBs and would periodically upload information to a central data processing website, which correlates the incoming data from all participants, to identify the signature of a real, globe-encompassing, FRB from an astronomical distance. Triangulation of the GPS-based pulse arrival times reported from different locations will provide the FRB sky position, potentially to arc-second accuracy. Pulse arrival times from phones operating at diverse frequencies, or from an on-device de-dispersion search, will yield the dispersion measure (DM) which will indicate the FRB source distance within the Galaxy. A variant of this approach would be to use the built-in ~100 MHz FM-radio receivers present in cell phones for an FRB search at lower frequencies. Alternatively, numerous "software-defined radio" (SDR) devices, costing ~$10 US each, could be plugged into USB ports of personal computers around the world (particularly in radio quiet regions) to establish the global network of receivers.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
