Traditional formation scenarios fail to explain 4:3 mean motion resonances

Details Traditional formation scenarios fail to explain 4:3 mean motion resonances Traditional formation scenarios fail to explain 4:3 mean motion resonances

2012-04-04

arxiv.org/abs/1204.0974v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

17 pages, 15 figures, submitted to MNRAS, comments welcome

Scientific paper

At least two multi-planetary systems in a 4:3 mean motion resonance have been found by radial velocity surveys. These planets are gas giants and only stable when protected by a resonance. Additionally the Kepler mission has detected at least 4 strong candidate planetary systems with a period ratio close to 4:3. This paper investigates traditional dynamical scenarios for the formation of these systems. We systematically study migration scenarios with both N-body and hydro-dynamic simulations. We investigate scenarios involving the in-situ formation of two planets in resonance. We look at the results from finely tuned planet-planet scattering simulations with gas disk damping. Finally, we investigate a formation scenario involving isolation-mass embryos. Although the combined planet-planet scattering and damping scenario seems promising, none of the above scenarios is successful in forming enough systems in 4:3 resonance with planetary masses similar to the observed ones. This is a negative result but it has important implications for planet formation. Previous studies were successful in forming 2:1 and 3:2 resonances. This is generally believed to be evidence of planet migration. We highlight the main differences between those studies and our failure in forming a 4:3 resonance. We also speculate on more exotic and complicated ideas. These results will guide future investigators toward exploring the above scenarios and alternative mechanisms in a more general framework.

Affiliated with

Also associated with

No associations

Rating

Traditional formation scenarios fail to explain 4:3 mean motion resonances does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Traditional formation scenarios fail to explain 4:3 mean motion resonances, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Traditional formation scenarios fail to explain 4:3 mean motion resonances will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-32420