DISCOVERY of A NEW RETROGRADE TRANS-NEPTUNIAN OBJECT: HINT of A COMMON ORBITAL PLANE for LOW SEMIMAJOR AXIS, HIGH-INCLINATION TNOs and CENTAURS

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题名:	DISCOVERY of A NEW RETROGRADE TRANS-NEPTUNIAN OBJECT: HINT of A COMMON ORBITAL PLANE for LOW SEMIMAJOR AXIS, HIGH-INCLINATION TNOs and CENTAURS
作者:	葉永烜;Chen (陳英同), Ying-Tung;Lin (林省文), Hsing Wen;Holman, Matthew J.;Payne, Matthew J.;Fraser, Wesley C.;Lacerda, Pedro;Ip (葉永烜), Wing-Huen;Chen (陳文屏), Wen-Ping;Kudritzki, Rolf-Peter;Jedicke, Robert;Wainscoat, Richard J.;Tonry, John L.;Magnier, Eugene A.;Waters, Christopher;Kaiser, Nick;Wang, Shiang-Yu;Lehner, Matthew
贡献者:	理學院天文研究所
关键词:	Aircraft detection;Clustering;Disks;Dwarf planets;Kuiper belt: general;Oort Cloud;Origins;Planes;surveys;Trans-Neptunian objects
日期:	2016-08-20
上传时间:	2026-04-21 14:55:40 (UTC+8)
出版者:	IOP Publishing Ltd.;The American Astronomical Society
摘要:	摘要： ABSTRACT Although the majority of Centaurs are thought to have originated in the scattered disk, with the high-inclination members coming from the Oort cloud, the origin of the high-inclination component of trans-Neptunian objects (TNOs) remains uncertain. We report the discovery of a retrograde TNO, which we nickname "Niku," detected by the Pan-STARRS 1 Outer Solar System Survey. Our numerical integrations show that the orbital dynamics of Niku are very similar to that of 2008 KV42 (Drac), with a half-life of ∼500 Myr. Comparing similar high-inclination TNOs and Centaurs (q > 10 au, a < 100 au, and i > 60°), we find that these objects exhibit a surprising clustering of ascending node, and occupy a common orbital plane. This orbital configuration has high statistical significance: 3.8- . An unknown mechanism is required to explain the observed clustering. This discovery may provide a pathway to investigating a possible reservoir of high-inclination objects. 其他題名： APJL 其他題名： Astrophys. J. Lett 出版者： The American Astronomical Society 出版日期： 2016-08-20 出處： Astrophysical journal. Letters, 2016-08, Vol.827 (2), p.L24--L24 資源來源： Institute of Physics Journals 版權： 2016. The American Astronomical Society. All rights reserved. 識別號： ISSN: 2041-8205 識別號： ISSN: 2041-8213 識別號： EISSN: 2041-8213 識別號： DOI: 10.3847/2041-8205/827/2/L24
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