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arXiv 1608.08772astro-ph.EPastro-ph.IMastro-ph.SR
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新的极端海王星外天体:朝向外太阳系的超级地球

New Extreme Trans-Neptunian Objects: Towards a Super-Earth in the Outer Solar System

Scott S. Sheppard, Chad Trujillo

摘要:

我们正在进行一项对极端太阳系天体的调查,以了解塞德娜和2012 VP 113,并确定外太阳系是否存在未知的大质量行星。两个新的天体,2014 SR 349和2013 FT 28,是极端分离的海王星外天体,a>150 AU,近日点远超过海王星(q>40 AU)。这两个新的对象的轨道参数近日点的范围内的集群的这个角度为其他极端的对象。其中一个天体2014 SR 349的近日点经度与其他极端天体相似,但2013 FT 28的近日点经度约为180度,或者说是反对齐的。我们还发现了第一个近日点在海王星之外的外部奥尔特云物体,2014 FE 72。我们讨论这些和其他有趣的对象在我们正在进行的调查发现。所有的高半长轴(a>150 AU)和高近日点(q>35 AU)天体都遵循先前确定的近日点聚集的论点,这是特鲁希略和谢泼德(Trujillo and Sheppard,2014)首次报道和解释的,来自一颗未知的大质量行星,有些人称之为行星X或行星9。最后,结合2013 FT28的发现,我们发现对于所有极端天体,近日点经度与近日点辐角和轨道极角都有显著的相关性。这种先前未被注意到的相关性进一步证明了一颗未知的大质量行星在偏心倾斜轨道上,就像极端偏心的天体在天空的相对两侧(近日点相差180度经度)将在轨道上的相对点接近倾斜的偏心行星,因此,极端天体更喜欢远离相反的黄道纬度,以避免行星(即近日点或极角的相反幅角)。

英文摘要:

We are conducting a survey for extreme solar system objects to understand Sedna and 2012 VP113 and determine if an unknown massive planet exists in the outer solar system. Two new objects, 2014 SR349 and 2013 FT28, are extreme detached trans-Neptunian objects, with a>150 AU and perihelia well beyond Neptune (q>40 AU). Both new objects have orbits with arguments of perihelia within the range of clustering of this angle for other extreme objects. One of these objects, 2014 SR349, has a longitude of perihelion similar to the other extreme objects, but 2013 FT28 is about 180 degrees away or anti-aligned in its longitude of perihelion. We also discovered the first outer Oort cloud object with a perihelion beyond Neptune, 2014 FE72. We discuss these and other interesting objects discovered in our ongoing survey. All the high semi-major axis (a>150 AU) and high perihelion (q>35 AU) bodies follow the previously identified argument of perihelion clustering as first reported and explained as being from an unknown massive planet by Trujillo and Sheppard (2014), which some have called Planet X or Planet 9. Finally, with the discovery of 2013 FT28, we find that the longitude of perihelion is significantly correlated with the argument of perihelion and orbit pole angle for all extreme objects. This previous unnoticed correlation is further evidence of an unknown massive planet on an eccentric inclined orbit, as extreme eccentric objects with perihelia on opposite sides of the sky (180 degree longitude of perihelion differences) would approach the inclined eccentric planet at opposite points in their orbits, thus making the extreme objects prefer to stay away from opposite ecliptic latitudes to avoid the planet (i.e. opposite argument of perihelia or pole angles).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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