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arXiv 1306.1862astro-ph.EP
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热红外线中的半人马和散射盘状天体:WISE/NEOWISE观测分析

Centaurs and Scattered Disk Objects in the Thermal Infrared: Analysis of WISE/NEOWISE Observations

James M. Bauer, Tommy Grav, Erin Blauvelt, A. K. Mainzer, Joseph R. Masiero, Rachel Stevenson, Emily Kramer, Yan R. Fernández, C. M. Lisse, Roc M. Cutri, Paul R… 展开作者

James M. Bauer, Tommy Grav, Erin Blauvelt, A. K. Mainzer, Joseph R. Masiero, Rachel Stevenson, Emily Kramer, Yan R. Fernández, C. M. Lisse, Roc M. Cutri, Paul R. Weissman, John W. Dailey, Frank J. Masci, Russel Walker, Adam Waszczak, Carrie R. Nugent, Karen J. Meech, Andrew Lucas, George Pearman, Ashlee Wilkins, Jessica Watkins, Shrinivas Kulkarni, Edward L. Wright, the WISE, PTF Teams

摘要:

宽视场红外巡天探测器(WISE)在热红外线中观测到52个半人马座和散射盘天体,其中包括15个新发现。我们目前的分析,这些观测估计的大小和平均光学反射率。我们发现整个数据集的平均误差为0.08 +/- 0.04。热拟合产生的平均聚束参数为0.9 +/- 0.2,这与SDO和Centaur子类相似。有偏累积粒径分布产生粒径-频率分布幂律指数~ -1.7 +/- 0.3。这些数据还揭示了在3西格玛水平上的颜色和颜色之间的关系。未发现直径与弯曲度之间的显著关系。

英文摘要:

The Wide-field Infrared Survey Explorer (WISE) observed 52 Centaurs and Scattered Disk Objects in the thermal infrared, including the 15 discoveries that were new. We present analyses of these observations to estimate sizes and mean optical albedos. We find mean albedos of 0.08 +/- 0.04 for the entire data set. Thermal fits yield average beaming parameters of 0.9 +/- 0.2 that are similar for both SDO and Centaur sub-classes. Biased cumulative size distributions yield size-frequency distribution power law indices ~ -1.7 +/- 0.3. The data also reveal a relation between albedo and color at the 3-sigma level. No significant relation between diameter and albedos is found.

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