The dynamics of the main (non-resonant) Kuiper belt also may support this idea.
- The main Kuiper belt is very excited.
- Most likely due to massive objects moving through the region.
- The Thommes et al. model can explain the a-e distribution of the main KB.
- But, cannot quite explain inclinations yet .
- It may also explain the H-i distribution. (Levison & Stern 2001)
- There is correlation a between inclination and absolute magnitude, H.
- Big guys have higher i's!
- Only 0.02% chance that the i-distribution of H<6.5 objects is the same as H>6.5.
- Interpreted as superposition of a hot and cold population. (like Brown 2001)
- Cold population has H>6.5 and i<5O.
- So how did this happen? ........... I can think of only one way:
- Start with a cold disk.
- Accretion occurs faster closer in so bigger objects are closer in.
- A large object (say Neptune-sized) is delivered to the inner regions of disk,
say with a perihelion distance of ~40AU.
- Inner disk objects are scattered outward and then the planet moves on.
- In the outer regions of the disk, the high i objects formed closer in, so can be larger.
- Get a similar thing in the Thommes et al. simulations.