Interstellar dust
Interstellar dust
Interstellar dust
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Grain surface chemistry:<br />
Monte carlo simulations<br />
Atoms arrive randomly from gas phase<br />
Flux=n X<br />
v X<br />
σ (s -1 )<br />
On the grid<br />
random walk<br />
UV + CR<br />
Evaporation<br />
O<br />
H<br />
Grain surface = grid<br />
Each point of the grid:<br />
site atom/molecule<br />
Formation of molecules<br />
D<br />
H 2<br />
, HD, D 2<br />
, OH, OD, O 2<br />
, H 2<br />
O, HDO, D 2<br />
O, O 3<br />
, HO 2<br />
, DO 2<br />
, H 2<br />
O 2<br />
, HDO 2<br />
, D 2<br />
O 2
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