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arXiv 1504.04199astro-ph.EP
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根据WISE热红外数据的小行星的热物理模拟-形状模型和极取向不确定性的意义

Thermophysical modeling of asteroids from WISE thermal infrared data - Significance of the shape model and the pole orientation uncertainties

Josef Hanuš, Marco Delbo', Josef Ďurech, Victor Alí-Lagoa

摘要:

在利用热物理模型分析小行星的热红外数据时,通常的做法是忽略形状模型和旋转状态的不确定性,因为它们是模型的输入。在这里,我们提出了一种新的方法,调查的重要性,形状模型和极取向的不确定性的热物理建模-变形状TPM(VS-TPM)。我们的方法使用光学光度数据来生成各种形状模型,映射形状和旋转状态的不确定性。然后对所有这些形状模型运行TPM过程。我们应用经典的TPM的实施,以及我们的VS-TPM的凸形模型的几个小行星连同他们的热红外数据获得的美国宇航局的宽视场红外巡天探测器(WISE)和比较的结果。这些表明形状模型和极点取向的不确定性可能非常重要(例如,用于确定热惯性),并应在热物理分析中予以考虑。我们给出了六颗小行星的热物理性质:(624)Hektor,(771)Libera,(1036)Ganymed,(1472)Muonio,(1627)Ivar和(2606)Odessa。

英文摘要:

In the analysis of thermal infrared data of asteroids by means of thermophysical models (TPMs) it is a common practice to neglect the uncertainty of the shape model and the rotational state, which are taken as an input for the model. Here, we present a novel method of investigating the importance of the shape model and the pole orientation uncertainties in the thermophysical modeling - the varied shape TPM (VS-TPM). Our method uses optical photometric data to generate various shape models that map the uncertainty in the shape and the rotational state. The TPM procedure is then run for all these shape models. We apply the implementation of the classical TPM as well as our VS-TPM to the convex shape models of several asteroids together with their thermal infrared data acquired by the NASA's Wide-field Infrared Survey Explorer (WISE) and compare the results. These show that the uncertainties of the shape model and the pole orientation can be very important (e.g., for the determination of the thermal inertia) and should be considered in the thermophysical analyses. We present thermophysical properties for six asteroids - (624) Hektor, (771) Libera, (1036) Ganymed, (1472) Muonio, (1627) Ivar, and (2606) Odessa.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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