论文标题
从明智的数据中确定1929年的小行星旋转周期
Determination of 1929 Asteroid Rotation Periods from WISE Data
论文作者
论文摘要
我们使用了4420小行星的22美元$ M（W4）宽场红外调查探索者（WISE）观测值来分析灯弯，并确定1929年小行星的旋转周期估计值。我们将大量试验频率的二阶傅立叶模型拟合到W4数据，并分析了所得期刊。最初，我们排除了超过每天7.57旋转（p <3.17小时）的旋转频率，这些旋转频率并未通过明智进行充分采样，并且周期超过了明智观察间隔的两倍，通常是36小时。三种解决方案准确地捕获了我们样本中的绝大多数旋转频率：最佳拟合频率及其镜子每天旋转约3.78和7.57旋转。通过将我们的溶液与752小行星自旋时期的高质量对照组进行比较，我们发现我们的一种解决方案在88％的情况下是准确的（在5％以内）。最佳拟合，次级和第三级解决方案分别在55％，27％和6％的情况下准确。我们还观察到，与准均匀抽样相比，抑制混叠溶液在不均匀的采样方面更有效。
We used 22 $μ$m (W4) Wide-field Infrared Survey Explorer (WISE) observations of 4420 asteroids to analyze lightcurves and determined spin period estimates for 1929 asteroids. We fit second-order Fourier models at a large number of trial frequencies to the W4 data and analyzed the resulting periodograms. We initially excluded rotational frequencies exceeding 7.57 rotations per day (P < 3.17 hr), which are not sampled adequately by WISE, and periods that exceed twice the WISE observation interval, which is typically 36 hr. Three solutions accurately capture the vast majority of the rotational frequencies in our sample: the best-fit frequency and its mirrors around 3.78 and 7.57 rotations per day. By comparing our solutions to a high-quality control group of 752 asteroid spin periods, we found that one of our solutions is accurate (within 5%) in 88% of the cases. The best-fit, secondary, and tertiary solutions are accurate in 55%, 27%, and 6% of the cases, respectively. We also observed that suppression of aliased solutions was more effective with non-uniform sampling than with quasi-uniform sampling.
