title: On the filtering and processing of dust by planetesimals 1. Derivation of collision probabilities for non-drifting planetesimals. Astronomy and Astrophysics - A&A, 2014, 572, pp.A72. &#x27E8;hal-01067951v4&#x27E9;
text: 10
  
  -2
  
  10
  
  -1
  
  10
  
  Size [cm]
  101
  102
  
  0
  
  103
  
  104
  
  ρ=1 g/cm3, Rp,mean=1 km, r=1 AU, MMSN
  
  xfilter,geo,circ,MMSN
  
  10.00
  -4
  
  0
  
  1
  =
  α
  
  1.00
  
  -2
  
  0
  
  1
  =
  α
  
  0.10
  0.01
  10-4
  
  10-2
  
  100
  τs
  
  102
  
  104.
  