论文标题
NGEHT观测的源频率相引用技术的应用
Applications of the source-frequency phase-referencing technique for ngEHT observations
论文作者
论文摘要
源频率相引用（SFPR）技术已被证明对MM-VLBI观察具有很大的优势。通过在下一代事件地平线望远镜（NGEHT）天线上实施同时进行多频接收系统，进行频率相传递（FPT）是可行的，该频率相传（FPT）可以校准非散发性传播错误并显着增加可见度数据中相位一致性。这种增加为弱源或结构检测提供了有效的方法。 SFPR还可以使高精度的天文测量值，包括用于SGR A*和M87*的核心迁移测量值。我们还简要讨论了与NGEHT的SFPR观察的技术和调度注意事项。
The source-frequency phase-referencing (SFPR) technique has been demonstrated to have great advantages for mm-VLBI observations. By implementing simultaneous multi-frequency receiving systems on the next generation Event Horizon Telescope (ngEHT) antennas, it is feasible to carry out a frequency phase transfer (FPT) which could calibrate the non-dispersive propagation errors and significantly increase the phase coherence in the visibility data. Such increase offers an efficient approach for weak source or structure detection. SFPR also makes it possible for high precision astrometry, including the core-shift measurements up to sub-mm wavelengths for Sgr A* and M87* etc. We also briefly discuss the technical and scheduling considerations for future SFPR observations with the ngEHT.
