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arXiv 2101.02728astro-ph.EPastro-ph.IM
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用热模拟方法对小行星反照率的解释

Uncertainties on Asteroid Albedos Determined by Thermal Modeling

Joseph R. Masiero, E. L. Wright, A. K. Mainzer

摘要:

我们提出了一个分析的准确性的几何确定的小行星通过模拟观测到的热红外辐射。我们表明,在测量的$H_V$绝对星等的不确定性,并在统计应用中使用的任何分析,也将主要由这个来源的不确定性,占主导地位。除了一小部分拥有大量特征数据的小行星外,对$H_V$星等的了解将从根本上受到不完整的相位曲线覆盖、不完整的光变曲线知识以及从观测波段到$V$波段的必要转换的限制。将绝对星等标准转换到不同的波段,如$r'$,将减轻许多测量因波段转换而造成的不确定性,但这只代表总不确定性的一小部分。因此,利用这些不确定性的技术必须确保它们的不确定性得到适当的解释。

英文摘要:

We present an analysis of the accuracy of geometric albedos determined for asteroids through the modeling of observed thermal infrared radiation. We show that albedo uncertainty is dominated by the uncertainty on the measured $H_V$ absolute magnitude, and that any analysis using albedos in a statistical application will also be dominated by this source of uncertainty. For all but the small fraction of asteroids with a large amount of characterization data, improved knowledge of the $H_V$ magnitude will be fundamentally limited by incomplete phase curve coverage, incomplete light curve knowledge, and the necessary conversion from the observed band to the $V$ band. Switching the absolute magnitude standard to a different band such a $r'$ would mitigate the uncertainty due to band conversion for many surveys, but this only represents a small component of the total uncertainty. Therefore, techniques making use of these albedos must ensure that their uncertainties are being properly accounted for.

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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