Rotation Periods of Asteroids Determined With Bootstrap Convex Inversion From ATLAS Photometry
Rotation Periods of Asteroids Determined With Bootstrap Convex Inversion From ATLAS Photometry
复制标题
利用 ATLAS 光度测量的 Bootstrap 凸反演确定小行星的自转周期
DOI：
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发表时间：
2022
影响因子：
3
通讯作者：
N. Erasmus
中科院分区：
文献类型：
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作者：
J. Ďurech;M. Vavra;R. Vančo;N. Erasmus
自转周期是小行星的基本物理特征之一。它可以通过时间序列周期分析的标准方法从光度测量中确定，也可以通过建立一个以自转周期为拟合参数之一的小行星物理模型来确定。我们使用后一种方法确定了5000多颗小行星的恒星自转周期，其中大约1600颗是周期未知的。我们在Asteroids@home项目中使用光变曲线反演技术处理了ATLAS调查中约100，000颗小行星的光度测量，以寻找最佳拟合的旋转周期。这用随机重采样自举数据重复25次。对于数以千计的小行星来说，它们的最佳拟合周期对于大多数自助数据集来说是相同的;因此，它们的自转周期是以高度可靠的方式确定的。
The rotation period is one of the fundamental physical characteristics of asteroids. It can be determined from photometric measurements by standard methods of time-series period analysis or by creating a physical model of an asteroid with the rotation period being one of the fitted parameters. We used the latter approach to determine the sidereal rotation period for more than 5000 asteroids, out of which about 1600 are those for which their period was not known. We processed photometric measurements of about 100,000 asteroids from the ATLAS survey with the light curve inversion technique in the Asteroids@home project to search for the best-fit rotation period. This was repeated 25 times with randomly resampled—bootstrapped—data. For thousands of asteroids, their best-fit period was the same for most of the bootstrapped data sets; thus, their rotation period was determined with a high degree of reliability.