A Lopsided Outer Solar System
| Autor: | Alexander Zderic, Maria Tiongco, Angela Collier, Heather Wernke, Aleksey Generozov, Ann-Marie Madigan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Earth and Planetary Astrophysics (astro-ph.EP)
FOS: Physical sciences Astronomy and Astrophysics 06 humanities and the arts 0603 philosophy ethics and religion 01 natural sciences Astrophysics - Astrophysics of Galaxies Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) 060302 philosophy 0103 physical sciences Astrophysics::Earth and Planetary Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Astrophysics - Earth and Planetary Astrophysics |
| Popis: | Axisymmetric disks of eccentric orbits in near-Keplerian potentials are unstable to an out-of-plane buckling. Recently, Zderic et al. (2020) showed that an idealized disk saturates to a lopsided mode. Here we show that this apsidal clustering also occurs in a primordial scattered disk in the outer solar system which includes the orbit-averaged gravitational influence of the giant planets. We explain the dynamics using Lynden-Bell (1979)'s mechanism for bar formation in galaxies. We also show surface density and line of sight velocity plots at different times during the instability, highlighting the formation of concentric circles and spiral arms in velocity space. 17 pages, 13 figures |
| Databáze: | OpenAIRE |
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