Solar obliquity induced by planet nine: Simple Calculation
Open accessAbstract
Bailey et al. and Gomes et al. recently suggested that the 6° misalignment between the Sun’s rotational equator and the orbital plane of the major planets may be produced by forcing from the hypothetical Planet Nine on an inclined orbit. Here, we present a simple yet accurate calculation of the effect, which provides a clear description of how the Sun’s spin orientation depends on the property of Planet Nine in this scenario.
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The secular gravitational torque exerted by P9 upon the canonical giant planets would slowly perturb the orbital plane of the planets away from its initial state, exciting a spin-orbit misalignment between the total angular momentum vector of the canonical giant planets and the spin-axis of the sun.
“Shortly after the initial formulation of the Planet Nine hypothesis, it was pointed out by Bailey et al. (2016); Gomes et al. (2016); Lai (2016) that the secular gravitational torque exerted by P9 upon the canonical giant planets would slowly perturb the orbital plane of the planets away from its initial state, thereby exciting a spin-orbit misalignment between the total angular momentum vector of”
From The planet nine hypothesis (2019) · cites this paper as Lai (2016)
Cites
Evidence for a Distant Giant Planet in the Solar System
Batygin, K., & Brown, M. E. (2016) · The Astronomical Journal · doi:10.3847/0004-6256/151/2/22 · Cited by 432 · cited 3× · see citing works
“Batygin & Brown (2016) showed that a hypothetical planet (“Planet Nine”) in the outer solar system can explain several otherwise intriguing orbital properties of distant KBOs.”
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Batygin, K., Adams, F. C., Brown, M. E., & Becker, J. C. (2019) · Physics Reports · doi:10.1016/j.physrep.2019.01.009 · Cited by 181 · see citing works
“Shortly after the initial formulation of the Planet Nine hypothesis, it was pointed out by Bailey et al. (2016); Gomes et al. (2016); Lai (2016) that the secular gravitational torque exerted by P9 upon the canonical giant planets would slowly perturb the orbital plane of the planets away from its…”
BackgroundOrigin and Evolution of Short-period Comets
Nesvorný, D., Vokrouhlický, D., Dones, L., Levison, H. F., Kaib, N., & Morbidelli, A. (2017) · The Astrophysical Journal · doi:10.3847/1538-4357/aa7cf6 · Cited by 163 · see citing works
Testing the Isotropy of the Dark Energy Survey’s Extreme Trans-Neptunian Objects
Bernardinelli, P. H., Bernstein, G. M., Sako, M., Hamilton, S., Gerdes, D. W., Adams, F. C., Saunders, W. R., Aguena, M., Allam, S., Avila, S., et al. (2020) · The Planetary Science Journal · doi:10.3847/psj/ab9d80 · Cited by 39 · see citing works
- Authors
- Lai, D.
- Affiliations
- Cornell University (US)
- Corresponding author
- Lai, Dong
- ORCID
- Lai, Dong
- Venue
- The Astronomical Journal
- Publisher
- American Astronomical Society
- Published
- 2016-12-01
- Volume
- 152
- Issue
- 6
- Pages
- 215
- ISSN
- 0004-6256 (ISSN-L)
- 1538-3881
- OpenAlex
- W2494286130
- Cited by
- 30
- References
- 1
- Citations by year
- 2026: 1 · 2023: 2 · 2022: 2 · 2020: 3 · 2019: 8 · 2018: 8 · 2017: 5 · 2016: 1
- FWCI
- 3.51
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- The Astronomical Journal (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Aeronautics and Space Administration (NNX14AG94G, NNX14AP31G)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › History and Developments in Astronomy
- Keywords
- Planet Nine, orbital misalignment, inclined orbits, orbital forcing, solar system dynamics
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