English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present a series of dynamical maps for fictitious 3-planets systems ininitially circular coplanar orbits. These maps have unveiled a rich resonantstructure involving two or three planets, as well as indicating possiblemigration routes from secular to double resonances or pure 3-planetcommensurabilities. These structures are then compared to the present-dayorbital architecture of observed resonant chains. In a second part of the paperwe describe N-body simulations of type-I migration. Depending on the orbitaldecay timescale, we show that 3-planet systems may be trapped in differentcombinations of independent commensurabilities: (i) double resonances, (ii)intersection between a 2-planet and a first-order 3-planet resonance, and (iii)simultaneous libration in two first-order 3-planet resonances. These latteroutcomes are found for slow migrations, while double resonances are almostalways the final outcome in high-density disks. Finally, we discuss anapplication to the TRAPPIST-1 system. We find that, for low migration rates andplanetary masses of the order of the estimated values, most 3-planetsub-systems are able to reach the observed double resonances after followingevolutionary routes defined by pure 3-planet resonances. The final orbitalconfiguration shows resonance offsets comparable with present-day valueswithout the need of tidal dissipation. For the 8/5 resonance proposed todominate the dynamics of the two inner planets, we find little evidence of itsdynamical significance; instead, we propose that this relation between meanmotions could be a consequence of the interaction between a pure 3-planetresonance and a 2-planet commensurability between planets c and d.

Resonance Capture and Dynamics of 3-Planet Systems