Discussion of the papers presented at Caltech University, regarding a Giant Planet tilting our Entire Solar System.

Solar Obliquity Induced by Planet Nine

Elizabeth Bailey, Konstantin Batygin, Michael E. Brown

(Submitted on 14 Jul 2016 (v1), last revised 20 Jul 2016 (this version, v2))

The six-degree obliquity of the sun suggests that either an asymmetry was present in the solar system's formation environment, or an external torque has misaligned the angular momentum vectors of the sun and the planets. However, the exact origin of this obliquity remains an open question. Batygin & Brown (2016) have recently shown that the physical alignment of distant Kuiper Belt orbits can be explained by a 5-20 Earth-mass planet on a distant, eccentric, and inclined orbit, with an approximate perihelion distance of ~250 AU. Using an analytic model for secular interactions between Planet Nine and the remaining giant planets, here we show that a planet with similar parameters can naturally generate the observed obliquity as well as the specific pole position of the sun's spin axis, from a nearly aligned initial state. Thus, Planet Nine offers a testable explanation for the otherwise mysterious spin-orbit misalignment of the solar system.

Comments:8 pages, 4 figures, manuscript #: AAS01477, submitted on June 24, 2016

Subjects:Earth and Planetary Astrophysics (astro-ph.EP)

DOI:10.3847/0004-6256/152/5/126

Cite as:arXiv:1607.03963 [astro-ph.EP]

 (or arXiv:1607.03963v2 [astro-ph.EP] for this version)

Submission history

From: Elizabeth Bailey [view email]
[v1] Thu, 14 Jul 2016 00:03:28 GMT (5282kb,D)
[v2] Wed, 20 Jul 2016 01:21:27 GMT (5238kb,D)

https://arxiv.org/abs/1607.03963

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