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comparison of gas and dust cooling rates in - Rencontres de Moriond

comparison of gas and dust cooling rates in - Rencontres de Moriond

comparison of gas and dust cooling rates in - Rencontres de Moriond

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E. Bayet<br />

≡ Radiation field (CII / C)<br />

PDR / TOTAL (CII)<br />

<strong>Moriond</strong> – March, 6th-12th 2005<br />

Comparison between differents tracers : 1) Morphologic<br />

(neutral <strong>and</strong> molecular <strong>gas</strong> + <strong>dust</strong>)<br />

≡ Density (CII / OI)<br />

Dust <strong>cool<strong>in</strong>g</strong> Dust <strong>cool<strong>in</strong>g</strong><br />

Dust <strong>cool<strong>in</strong>g</strong><br />

≡ Cool<strong>in</strong>g efficiency (CO / FIR & C/ FIR)<br />

Heat<strong>in</strong>g efficiency<br />

Larger dispersion<br />

<strong>in</strong> <strong>dust</strong> <strong>cool<strong>in</strong>g</strong> than<br />

<strong>in</strong> radiation field<br />

<strong>and</strong> <strong>de</strong>nsity<br />

Contribution <strong>of</strong><br />

the CII from PDR<br />

more important <strong>in</strong><br />

NGC 6946<br />

CO <strong>cool<strong>in</strong>g</strong> rate<br />

more efficient than<br />

C <strong>cool<strong>in</strong>g</strong> rate<br />

IC 10 clearly<br />

differs from others

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