The Scattered Disk as a Source of Halley-Type Comets
- There is a dynamical mechanism that can create HTCs from the scattered disk.
- 'Scattered disk' because planetary perturbations are always important
(i.e. objects never have large q).
- It reproduces the semi-major axis and inclination distributions of the observed comets.
- There should be weak comet showers every 120 Myr.
- For this to work, the scattered disk must contain ~5 billion comet-sized objects.
- 10X larger than Duncan & Levison's estimate from the Jupiter-family comets.
- However, both numbers are badly known.
- Consistent with observational evidence of Trujillo et al. (2000).
This talk can be found at
We are grateful to NASA's Origins and PG&G programs for support.