Col-OSSOS: Color and Inclination Are Correlated throughout the Kuiper Belt
Col-OSSOS: Color and Inclination Are Correlated throughout the Kuiper Belt
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Col-OSSOS：整个柯伊伯带的颜色和倾角是相关的
DOI：
10.3847/1538-3881/aaf72e
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Shiang‐Yu Wang
中科院分区：
文献类型：
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作者：
M. Marsset;W. Fraser;R. Pike;M. Bannister;M. Schwamb;K. Volk;J. Kavelaars;J. Kavelaars;M. Alexandersen;Ying;B. Gladman;S. Gwyn;M. J. Lehner;M. Lehner;M. J. Lehner;N. Peixinho;J. Petit;Shiang‐Yu Wang
必须考虑物理和动力学特性来限制动态激发的遥远太阳系群体的起源。我们展示了作为外太阳系起源颜色调查的一部分获得的 25 个小型（Hr > 5）动态激发的海王星天体 (TNO) 和半人马的高精度 (g–r) 颜色。我们将我们的数据集与之前发布的测量结果相结合，并考虑动态激发轨道上的一组 229 种颜色的外太阳系天体。整体颜色分布是双峰的，可以分解为两个不同的类别，称为灰色和红色，每个类别都具有正态颜色分布。这两个颜色类具有不同的倾斜度分布：红色对象的倾斜度低于灰色对象的倾斜度。这一趋势适用于所有动态兴奋的 TNO 群体。即使在最坏的情况下，发现调查中的偏差也无法解释这一趋势；它是 TNO 群体固有的。考虑到TNO是半人马星体的前身，并且它们的倾向在它们成为半人马星体时大致保留下来，我们的发现解决了半人马星体是迄今为止发现的唯一表现出这种特性的外太阳系星群的难题。灰色和红色动态激发的 TNO 的不同轨道分布提供了强有力的证据，证明它们的颜色是由于具有成分梯度的星子盘中不同的形成位置造成的。
Both physical and dynamical properties must be considered to constrain the origins of the dynamically excited distant solar system populations. We present high-precision (g–r) colors for 25 small (Hr > 5) dynamically excited trans-Neptunian objects (TNOs) and centaurs acquired as part of the Colours of the Outer Solar System Origins Survey. We combine our data set with previously published measurements and consider a set of 229 colors of outer solar system objects on dynamically excited orbits. The overall color distribution is bimodal and can be decomposed into two distinct classes, termed gray and red, that each has a normal color distribution. The two color classes have different inclination distributions: red objects have lower inclinations than the gray ones. This trend holds for all dynamically excited TNO populations. Even in the worst-case scenario, biases in the discovery surveys cannot account for this trend; it is intrinsic to the TNO population. Considering that TNOs are the precursors of centaurs, and that their inclinations are roughly preserved as they become centaurs, our finding solves the conundrum of centaurs being the only outer solar system population identified so far to exhibit this property. The different orbital distributions of the gray and red dynamically excited TNOs provide strong evidence that their colors are due to different formation locations in a disk of planetesimals with a compositional gradient.
DOI：
10.3847/0004-6256/152/3/70
发表时间：
2015-11
期刊：
The Astronomical Journal
影响因子：
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作者：
M. Bannister;M. Bannister;J. Kavelaars;J. Petit;B. Gladman;S. Gwyn;Ying-Tung Chen;K. Volk;M. Alexandersen;S. Benecchi;A. Delsanti;W. Fraser;M. Granvik;W. Grundy;A. Guilbert-Lepoutre;D. Hestroffer;W. Ip;W. Ip;M. Jakubik;L. Jones;N. Kaib;Catherine F. Kavelaars;P. Lacerda;S. Lawler;M. Lehner;Hsing-Wen Lin;T. Lister;P. S. Lykawka;S. Monty;M. Marsset;R. Murray-Clay;K. Noll;A. Parker;R. Pike;P. Rousselot;D. Rusk;M. Schwamb;C. Shankman;B. Sicardy;P. Vernazza;Shiang‐Yu Wang
通讯作者：
M. Bannister;M. Bannister;J. Kavelaars;J. Petit;B. Gladman;S. Gwyn;Ying-Tung Chen;K. Volk;M. Alexandersen;S. Benecchi;A. Delsanti;W. Fraser;M. Granvik;W. Grundy;A. Guilbert-Lepoutre;D. Hestroffer;W. Ip;W. Ip;M. Jakubik;L. Jones;N. Kaib;Catherine F. Kavelaars;P. Lacerda;S. Lawler;M. Lehner;Hsing-Wen Lin;T. Lister;P. S. Lykawka;S. Monty;M. Marsset;R. Murray-Clay;K. Noll;A. Parker;R. Pike;P. Rousselot;D. Rusk;M. Schwamb;C. Shankman;B. Sicardy;P. Vernazza;Shiang‐Yu Wang