Evaluating the Impact of Optical Axis Stability on Exoplanet Detection  

作　　者：Dong-Jie Tan Jia-Cheng Liu Zi Zhu Niu Liu 

机构地区：[1]School of Astronomy and Space Science,Key Laboratory of Modern Astronomy and Astrophysics(Ministry of Education),Nanjing University,163 Xianlin Avenue,210023 Nanjing,China

出　　处：《Research in Astronomy and Astrophysics》2022年第2期86-91,共6页天文和天体物理学研究（英文版）

基　　金：funded by the National Natural Science Foundation of China(NSFC,Grant No.11833004);funded by the Strategic Priority Research Program on Space Science,the Chinese Academy of Sciences,Grant No.XDA15020800。

摘　　要：For detecting exoplanets with high precision,using the angular distance between the two stars to detect the periodic motion of the star will be a better choice.This approach can avoid importing the position error of the reference catalog in the process that uses a traditional photographic plate to derive the star position suffers.At the precision level of microarcseconds,the error caused by optical axis deviation is not negligible.In this paper,we evaluate the impact of the stability of the optical axis on the relative angular distance measurement from the aspects of theoretical analysis and numerical simulation.When the angular distance error limit of 1 microarcsecond is given,the upper limit of optical axis deviation is estimated to be 68 milliarcsecond.In addition,when limiting the deviation of the optical axis,we give the corresponding error allowance of angular distance measurement.Moreover,we also discuss the way to resolve the problem of CCD distortion and focal length change on the measurement of angular distance.The work in this paper is of guiding significance to the design of a telescope.

关 键 词：instrumentation:high angular resolution methods:numerical planets and satellites:detection 

分 类 号：P15[天文地球—天文学]