DAMIT: a database of asteroid models
DAMIT: a database of asteroid models
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DOI：
10.1051/0004-6361/200912693
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发表时间：
2010-04
影响因子：
6.5
通讯作者：
J. Ďurech;V. Sidorin;M. Kaasalainen
中科院分区：
文献类型：
--
作者：
J. Ďurech;V. Sidorin;M. Kaasalainen
上下文。除了由航天器直接成像的少数目标外，遥感技术是关于小行星基本物理特性的主要信息来源，例如大小，自旋状态或光谱类型。最广泛使用的观测技术——时间分辨光度法——为我们提供了可用于推导小行星形状和自旋状态的数据。在过去的十年里，对小行星光曲线的反演已经产生了一百多个小行星模型。在接下来的十年里，当来自全天调查的数据可用时，小行星模型的数量将会增加。将光度学与自适应光学数据相结合，可以产生更详细的模型。目标。我们创建了来自反演技术的小行星模型数据库（DAMIT），目的是为天文学界提供可靠和最新的小行星物理模型-即它们的形状，旋转周期和自转轴方向。来自DAMIT的模型可以用于对单个对象的进一步详细研究，也可以用于对整个集合的统计研究。方法。大多数DAMIT模型是通过光曲线反演方法从光度数据中获得的。其中一些已经进一步细化或缩放使用自适应光学图像，红外观测，或掩星数据。相当数量的模型也是使用来自天体测量数据库的稀疏光度数据导出的。结果。目前，该数据库包含了100多个小行星的模型。对于每一颗小行星，DAMIT提供了多面体形状模型、恒星自转周期、自转轴方向和用于反演的光度数据。当有新的模型可用时，或者当已经发布的模型被更新或改进时，数据库就会更新。我们还发布了光曲线反转和直接问题的C源代码（随后将进行更新和扩展）。
Context. Apart from a few targets that were directly imaged by spacecraft, remote sensing techniques are the main source of information about the basic physical properties of asteroids, such as the size, the spin state, or the spectral type. The most widely used observing technique ‐ time-resolved photometry ‐ provides us with data that can be used for deriving asteroid shapes and spin states. In the past decade, inversion of asteroid lightcurves has led to more than a hundred asteroid models. In the next decade, when data from all-sky surveys are available, the number of asteroid models will increase. Combining photometry with, e.g., adaptive optics data produces more detailed models. Aims. We created the Database of Asteroid Models from Inversion Techniques (DAMIT) with the aim of providing the astronomical community access to reliable and up-to-date physical models of asteroids ‐ i.e., their shapes, rotation periods, and spin axis directions. Models from DAMIT can be used for further detailed studies of individual objects, as well as for statistical studies of the whole set. Methods. Most DAMIT models were derived from photometric data by the lightcurve inversion method. Some of them have been further refined or scaled using adaptive optics images, infrared observations, or occultation data. A substantial number of the models were derived also using sparse photometric data from astrometric databases. Results. At present, the database contains models of more than one hundred asteroids. For each asteroid, DAMIT provides the polyhedral shape model, the sidereal rotation period, the spin axis direction, and the photometric data used for the inversion. The database is updated when new models are available or when already published models are updated or refined. We have also released the C source code for the lightcurve inversion and for the direct problem (updates and extensions will follow).