Planetesimals

Early Differentiaton and Consequences for Planets

QB603.O74 P55 2017 PSUlib

ξ

accretion efficiency, (MF-M1)/M2 ≤ 1

SSC

Similar Sized Collision, R1 ~ R2, vrel ~ vesc

HRC

Hit and Run Collision, ξ ~ 0

NLB

Next largest contributor bodies

GMC

graze-and-merge collions, ξ → 1

SFD

size frequency distribution dn ~ R(-α) dR

γ

Normalized projectile mass ( M2/(M1+M2)

θ

Impact angle asin(b/R1+R2)

b

impact parameter, closest radial distance

This is mostly about the formation of planets from planetesimals,

populations

1m count

max size 1 body

count exp

volume exp

NEA

2e10

20 km

2.4

0.8

main

1e13

600 km

2.25

0.75

Planetesimals (last edited 2019-03-26 19:20:50 by KeithLofstrom)