Reopening the TNOs color controversy: Centaurs bimodality and TNOs unimodality
Reopening the TNOs color controversy: Centaurs bimodality and TNOs unimodality
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DOI：
10.1051/0004-6361:20031420
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发表时间：
2003-09
影响因子：
6.5
通讯作者：
N. Peixinho;A. Doressoundiram;A. Delsanti;H. Boehnhardt;M. Barucci;I. B. Lesia;O. Paris;Caaul;Observatorio Astronomico de Lisboa;M. F. Astronomie;Astronomical Observatory of Vilnius University
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文献类型：
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作者：
N. Peixinho;A. Doressoundiram;A. Delsanti;H. Boehnhardt;M. Barucci;I. B. Lesia;O. Paris;Caaul;Observatorio Astronomico de Lisboa;M. F. Astronomie;Astronomical Observatory of Vilnius University
我们回顾了据称由Tegler和Romanishin(2003)解决的跨海王星物体(TNO)颜色争议。我们讨论了引用工作的统计方法，并讨论了为什么它不能得出声称的结论，并用更充分的统计检验重新分析了他们的数据样本。我们发现了在半人马人中存在两种颜色群体的证据。因此，混合半人马和TNOS种群导致了全球双峰型的错误结论，而没有证据表明仅在TNOS种群中存在两种颜色群。我们使用对20个半人马(对应于这类识别的物体的大约一半)发表的准同时可见颜色测量，并得出两个组的存在的结论。采用Delsanti等人的表面演化模型。(2003)，我们讨论了两组半人马的存在如何与连续的TNOS颜色分布相容。
We revisit the Trans-Neptunian Objects (TNOs) color controversy allegedly solved by Tegler & Romanishin (2003). We debate the statistical approach of the quoted work and discuss why it can not draw the claimed conclusions, and reanalyze their data sample with a more adequate statistical test. We find evidence for the existence of two color groups among the Centaurs. Therefore, mixing both centaurs and TNOs populations lead to the erroneous conclusion of a global bimodality, while there is no evidence for two color groups in the TNOs population alone. We use quasi-simultaneous visible color measurements published for 20 centaurs (corresponding to about half of the identified objects of this class), and conclude on the existence of two groups. With the surface evolution model of Delsanti et al. (2003) we discuss how the existence of two groups of Centaurs may be compatible with a continuous TNOs color distribution.