Interstellar dust
Interstellar dust
Interstellar dust
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Dust as catalyst/ reservoir<br />
H 2<br />
in MW NOT explained by gas phase reactions : Grain Gould & Salpeter 1963<br />
In the MW, H 2<br />
formation <strong>dust</strong> >> gas<br />
Reaction exothermic → products gas<br />
H 2<br />
(60-70 %)<br />
Extinction Av ~3<br />
Gas phase species → <strong>dust</strong> and make ices<br />
Hollenbach et al. 2009 ApJ, 690, 1497
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