Table 1:
Main model parameters for the nominal case.
Grains |
|
material |
Mg
Fe
SiO |
porosity |
compact grains (P=0) |
grain density |
3.5 g cm-3 |
Disc ("field'' population) |
|
minimum size |
m |
maximum size |
cm |
radial distribution |
Augereau et al. (2001) |
optical thickness along radius |
|
in the midplane |
 |
disc extension |
[20, 500] AU |
Initial planetesimal debris |
|
minimum size |
m |
maximum size |
cm |
size distribution (see Eq. (8)) |
 |
initial mass of dust released |
M0=1020 g |
distance from the star for |
|
the planetesimal breakup |
R0=20 AU |
initial velocity of |
|
the center of the mass |
 |
Collisional prescription |
|
threshold energy, s0=1 cm |
Q*0=107 erg g-1 |
power-law index (Eq. (11)) |
pQ=-0.2 |
size distribution of debris (see Eq. (12)) |
minimum size |
m |
power-law indexes for m<ms |
q1=1.5 |
power-law indexes for
 |
q2=1.83 |
position of the slope change |
 |