Characterizing Sparse Asteroid Light Curves with Gaussian Processes
Christina Willecke Lindberg, Daniela Huppenkothen, R. Lynne Jones, Bryce T. Bolin, Mario Juric, V. Zach Golkhou, Eric C. Bellm, Andrew J. Drake, Matthew J. Grah… 展开作者
Christina Willecke Lindberg, Daniela Huppenkothen, R. Lynne Jones, Bryce T. Bolin, Mario Juric, V. Zach Golkhou, Eric C. Bellm, Andrew J. Drake, Matthew J. Graham, Russ R. Laher, Ashish A. Mahabal, Frank J. Masci, Reed Riddle, Kyung Min Shin
在像Zwicky Transient Facility和Rubin Observatory's Legacy Survey of Space and Time这样的宽场测量时代，稀疏的光度测量在小行星观测中所占的比例越来越大，特别是对于这些大型测量中新发现的小行星。后续观测，以补充这些稀疏的数据可能是昂贵的，在许多情况下，为了克服这些采样的限制，我们引入了一个灵活的模型，高斯过程的基础上，使贝叶斯参数推断的小行星时间序列数据。该模型具有灵活性和可扩展性，可以同时模拟多个小行星属性，如旋转周期，光变曲线幅度，变化的脉冲轮廓以及由于相位角演变而引起的幅度变化。在这里，我们专注于旋转周期的推断。基于模拟的光变曲线和Zwicky瞬态设施的实际观测，我们表明，新模型可靠地推断旋转周期从稀疏采样的光变曲线，一般提供良好的约束后验概率密度的模型参数。我们提出这个框架作为快速，但非常有限的周期检测算法和更全面，但计算昂贵的形状建模的基础上射线跟踪代码之间的中间方法。
英文摘要：
In the era of wide-field surveys like the Zwicky Transient Facility and the Rubin Observatory's Legacy Survey of Space and Time, sparse photometric measurements constitute an increasing percentage of asteroid observations, particularly for asteroids newly discovered in these large surveys. Follow-up observations to supplement these sparse data may be prohibitively expensive in many cases, so to overcome these sampling limitations, we introduce a flexible model based on Gaussian Processes to enable Bayesian parameter inference of asteroid time series data. This model is designed to be flexible and extensible, and can model multiple asteroid properties such as the rotation period, light curve amplitude, changing pulse profile, and magnitude changes due to the phase angle evolution at the same time. Here, we focus on the inference of rotation periods. Based on both simulated light curves and real observations from the Zwicky Transient Facility, we show that the new model reliably infers rotational periods from sparsely sampled light curves, and generally provides well-constrained posterior probability densities for the model parameters. We propose this framework as an intermediate method between fast, but very limited period detection algorithms and much more comprehensive, but computationally expensive shape modeling based on ray-tracing codes.
Developing and characterizing a new-generation regolith simulant "IGCAS-AST01" for the Tianwen-2 target asteroid (469219) Kamo'oalewa
Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences（中国科学院地球化学研究所月球与行星科学中心）；School of Earth Sciences, China University of Geosciences（中国地质大学地球科学学院）；Department of Earth, Environmental and Planetary Sciences, Brown University（布朗大学地球、环境与行星科学系）；Institute of Analysis and testing, Beijing Academy of Science and Technology, Beijing Center for Physical & Chemical Analysis（北京科学院测试技术研究所，北京物理化学分析中心）；Department of Geography, University of Winnipeg（温尼伯大学地理系）；State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology（澳门科技大学月球与行星科学国家重点实验室）；ESA ESRIN/PDO/NEO Coordination Centre（欧洲空间局ESRIN/PDO近地天体协调中心）；Deimos Italia；China Academy of Aerospace Science and Innovation（中国航天科技创新研究院）；Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences（中国科学院上海技术物理研究所空间主动光电技术重点实验室）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；Institute of Geology and Geophysics, Chinese Academy of Sciences（中国科学院地质与地球物理研究所）；China Academy of Space Technology（中国空间技术研究院）
Extracting Asteroid Physical Properties from Vera C. Rubin Observatory Science Validation Survey Data: Rotational Periods, Colors, and Taxonomies
São Paulo State University (UNESP)（圣保罗州立大学）；Laboratório Interinstitucional de e-Astronomia（跨机构电子天文实验室）；NSF–DOE Vera C. Rubin Observatory / NSF NOIRLab（美国国家科学基金会-能源部薇拉·C·鲁宾天文台/美国国家科学基金会NOIRLab）；DiRAC Institute and the Department of Astronomy, University of Washington（华盛顿大学天文学系及DiRAC研究所）；Instituto de Astronomía y Ciencias Planetarias, Universidad de Atacama（阿塔卡马大学天文与行星科学研究所）；Universidad Tecnológica del Perú (UTP)（秘鲁理工大学）
Discovery of 2 km ultra-fast rotating asteroid in Rubin DP2 catalog via varying Fourier order method
University of Washington（华盛顿大学）；Institute of Applied Astronomy of Russian Academy of Sciences（俄罗斯科学院应用天体物理研究所）；Department of Astronomy, University of Illinois Urbana-Champaign（伊利诺伊大学厄巴纳-香槟分校天文学系）；Rubin Observatory/NSF NOIRLab（鲁宾天文台/美国国家光学红外天文实验室）
Shape, Orientation and Colors Combined approach for Asteroids (SOCCA)
Université Côte d’Azur（蔚蓝海岸大学）；Observatoire de la Côte d’Azur（蔚蓝海岸天文台）；CNRS（法国国家科学研究中心）；Laboratoire Lagrange（拉格朗日实验室）；MAUCA - Master track in Astrophysics（天体物理学硕士轨道项目）；Université Paris-Saclay（巴黎萨克雷大学）；CNRS/IN2P3（法国国家科学研究中心/法国国家粒子与核物理研究所）；IJCLab（理论与实验粒子物理及宇宙学实验室）；Institut d’Astrophysique Spatiale（天体物理学研究所）；Université Marie et Louis Pasteur（玛丽和路易·巴斯德大学）；Institut UTINAM (UMR 6213)（UTINAM研究所）；IMCCE（天体力学与历书计算研究所）；Observatoire de Paris（巴黎天文台）；PSL Research University（巴黎文理研究大学）；Sorbonne Universités（索邦大学）；UPMC Univ Paris 06（巴黎第六大学）；Univ. Lille（里尔大学）；Inria（法国国家信息与自动化研究所）；Maasai project-team（Maasai项目组）；Laboratoire J.A. Dieudonné（J.A.迪厄多内实验室）
