"The Size Distribution of Planetesimals Interior to 1 AU"

R. Barnes, T. Quinn, J. J. Lissauer, D. C. Richardson

(Astrobiology Science Conference Summary, p. 223)

We present simulations that examine collisional accretion amongst
planetesimals in the terrestrial zone around a 1 M_Sun star.  The
planetesimals begin as 1 km bodies with a density of 3 g/cc.
Specifically we examine the small (~ 10^{-3} AU square) patches of
10^5 particles inside 1 AU.  The simulations presented here are the
highest resolution representation of this phenomenon, and are
therefore the best estimate to date of the initial planetesimal size
distribution.