论文标题
Gaia DR2星的星体研究用于星际通信
Astrometric study of Gaia DR2 stars for interstellar communication
论文作者
论文摘要
我们讨论了将发射器高精度指向在银河主序列周围宜居行星上的前景。为了有效的信号传递，应比发射器的光束开头$θ$适当地对宿主恒星的未来天空位置进行适当的准确性。使用GAIA的最新数据发布（DR2），我们以$ 4.7 \ times 10^7 $ fgk星的单独估计外推的准确性，并发现目标总数可能是$ \ sim 10^7 $，以便准确的目标更好地比1英寸。
We discuss the prospects of high precision pointing of our transmitter to habitable planets around Galactic main sequence stars. For an efficient signal delivery, the future sky positions of the host stars should be appropriately extrapolated with accuracy better than the beam opening angle $Θ$ of the transmitter. Using the latest data release (DR2) of Gaia, we estimate the accuracy of the extrapolations individually for $4.7\times 10^7$ FGK stars, and find that the total number of targets could be $\sim 10^7$ for the accuracy goal better than 1". Considering the pairwise nature of communication, our study would be instructive also for SETI (Search for Extraterrestrial Intelligence), not only for sending signals outward.
