论文标题
太空引力检测器的天空定位
Sky localization of space-based gravitational wave detectors
论文作者
论文摘要
将重力波源的天空位置定位是引力波观测的关键科学目标。使用Fisher信息矩阵近似，我们计算了两个计划的基于空间的重力波检测器的角度分辨率，并检查检测器的配置特性如何，例如检测器平面，地球式或地球运动和地球臂长等的方向变化。影响源定位的精度。我们发现，由于探测器平面的年度变化方向而引起的幅度调节有助于丽莎在天空定位中获得更好的准确性，并且在几个MHz以下的频率下，频率更好，尽管固定天气的检测器检测器平面的方向，但其对天气的影响可忽略不计。在大约30MHz的频率下，天气在天空定位中的能力比丽莎更好。此外，我们探索了潜在的空间探测器网络，以快速准确地定位引力波源。 Lisa-Tianqin网络具有在1-100 MHz范围内的频率来源的天空定位能力，并且该网络的角度分辨率比单个检测器具有更大的天空覆盖率。
Localizing the sky position of the gravitational wave source is a key scientific goal for gravitational wave observations. Employing the Fisher information matrix approximation, we compute the angular resolutions of LISA and TianQin, two planned space-based gravitational wave detectors and examine how detectors' configuration properties, such as the orientation change of the detector plane, heliocentric or geocentric motion and the arm length etc. affect the accuracy of source localization. We find that the amplitude modulation due to the annual changing orientation of the detector plane helps LISA get better accuracy in the sky localization and better sky coverage at frequencies below several mHz, and its effect on TianQin is negligible although the orientation of TianQin's detector plane is fixed. At frequencies above roughly 30mHz, TianQin's ability in the sky localization is better than LISA. Further we explore potential space detector networks for fast and accurate localization of the gravitational wave sources. The LISA-TianQin network has better ability in sky localization for sources with frequencies in the range 1-100 mHz and the network has larger sky coverage for the angular resolution than the individual detector.
