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arXiv 2001.01482astro-ph.IM
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小天体:太阳系小天体热红外观测近远数据库

Small Bodies: Near and Far Database for thermal infrared observations of small bodies in the Solar System

Róbert Szakáts, Thomas Müller, Víctor Alí-Lagoa, Gábor Marton, Anikó Farkas-Takács, Evelin Bányai, Csaba Kiss

摘要:

在本文中,我们提出了“小天体:近和远”红外数据库,一个易于使用的工具,旨在促进太阳系小天体的热辐射建模。我们的数据库收集太阳系小型目标的热发射测量结果,这些测量结果在分散的来源中可用,并提供数据的完整描述,以及执行直接科学分析所需的所有信息,而无需访问额外的外部资源。这一公共数据库载有大型巡天(如AKARI、IRAS和WISE)小行星观测的代表性数据以及红外空间望远镜(如Herschel空间天文台)小天体观测的集合数据,并提供了访问这些数据的网络界面(https:ird.konkoly.hu)。我们还提供了一个例子,直接应用的数据库,并显示它如何可以用来估计特定人群的热惯性,例如在给定的大小范围内的小行星。我们展示了如何与日心距离(即温度)的热惯性的不同缩放可能会影响我们的数据的解释,并讨论为什么广泛使用的辐射传导率指数($α$ =-3/4)可能是不够的一般情况下,如以前的研究所暗示的。

英文摘要:

In this paper we present the "Small Bodies: Near and Far" Infrared Database, an easy-to-use tool intended to facilitate the modeling of thermal emission of small Solar System bodies. Our database collects thermal emission measurements of small Solar Systems targets that are otherwise available in scattered sources and gives a complete description of the data, with all information necessary to perform direct scientific analyses and without the need to access additional, external resources. This public database contains representative data of asteroid observations of large surveys (e.g. AKARI, IRAS and WISE) as well as a collection of small body observations of infrared space telescopes (e.g. the Herschel Space Observatory) and provides a web interface to access this data (https://ird.konkoly.hu). We also provide an example for the direct application of the database and show how it can be used to estimate the thermal inertia of specific populations, e.g. asteroids within a given size range. We show how different scalings of thermal inertia with heliocentric distance (i.e. temperature) may affect our interpretation of the data and discuss why the widely-used radiative conductivity exponent ($α$=-3/4) might not be adequate in general, as hinted by previous studies.

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