Interstellar dust
Interstellar dust
Interstellar dust
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Impact of <strong>dust</strong> on gas:<br />
uncertainties<br />
Leaving the grain upon formation<br />
<br />
<br />
Enthalpy of reaction<br />
Binding energy<br />
P(free)<br />
What do we know:<br />
<br />
<br />
P(stay)<br />
Experimentally: H2 desorbs upon formation for 60-70 % on<br />
Amorphous carbon/silicates grains<br />
Dynamic calculations: H2 and OH 100% (but OH stays longer before<br />
leaving the <strong>dust</strong>)
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