面向天体测量的矮行星Haumea相对测光试验  

Astrometry-Oriented Relative Photometry Test of Dwarf Planet Haumea

作　　者：李丹 郭碧峰[1,2] 陆星 郝佳男 彭青玉[1,2] Li Dan;Guo Bifeng;Lu Xing;Hao Jianan;Peng Qingyu(Department of Computer Science,Jinan University,Guangzhou 510632,China;Sino-French Joint Laboratory for Astrometry,Dynamics and Space Science,Jinan University,Guangzhou 510632,China;Department of Physics,Jinan University,Guangzhou 510632,China)

机构地区：[1]暨南大学计算机科学系,广东广州510632 [2]暨南大学中法天体测量、动力学与空间科学联合实验室,广东广州510632 [3]暨南大学物理系,广东广州510632

出　　处：《天文研究与技术》2023年第3期234-240,共7页Astronomical Research & Technology

基　　金：国家重点研发计划资助(资助号:2022YFE0116800);中国载人航天工程巡天空间望远镜专项科学研究项目(CMS-CSST-2021-B08);国家自然科学基金(11873026,11273014);国家自然科学天文联合基金重点项目(U1431227)资助.

摘　　要：使用紫金山天文台姚安观测站80 cm望远镜在2022年2月至4月对矮行星Haumea进行了两轮观测。对所有的观测图像使用干涉条纹剔除技术,并利用相对测光导出了Haumea的仪器星等,最后对两轮光度测量结果进行归一化处理以便联合分析。通过相位弥散最小化(Phase Dispersion Minimization,PDM)方法以及Lomb-Scargle周期图法分别求得了Haumea的自转周期。两种方法求得的自转周期结果仅相差0.072 s,这表明所求周期具有良好的一致性。Haumea光度测量结果显示明显的双峰自转光变曲线,自转周期为3.9154±0.0002 h,峰峰值幅度为0.26±0.01 mag。通过导出的自转光变曲线,最终估计了Haumea由于自转产生的光度变化对位置测量的影响最大为-9~9 mas。这一测光观测对后续高精度天体位置测量具有基础意义。The 80 cm telescope at Yaoan Station,Purple Mountain Observatory was used to observe the dwarf planet Haumea for two runs from February to April 2022.Interference fringes were removed from all the frames,and the instrument magnitude of Haumea was derived by relative photometry technology.Then,the photometric data were normalized for combining two observation runs to analysis.The rotation period of Haumea was obtained by the PDM(Phase Dispersion Minimization)method and the Lomb-Scargle Periodogram,respectively.The difference between the results by the two methods was 0.072 s,which showed good consistency.Our photometric results reveal a distinct,double-peaked rotational light curve with a period of 3.9154±0.0002 h and peak-to-peak amplitude of 0.26±0.01 mag.Through the derived rotational light curve,it is finally estimated that the maximum influence of the photometric change of Haumea due to rotation on the astrometry is-9~9 mas.The test has a basic significance for future high-precision astrometry.

关 键 词：相对测光 柯伊伯带 周期求解 CCD图像处理 

分 类 号：P141.2[天文地球—天体物理]