The Excited and Exciting ISM in Galaxies: PDRs, XDRs ... - Caltech
The Excited and Exciting ISM in Galaxies: PDRs, XDRs ... - Caltech
The Excited and Exciting ISM in Galaxies: PDRs, XDRs ... - Caltech
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<strong>The</strong> T-n phase diagram<br />
Gas that is ly<strong>in</strong>g beh<strong>in</strong>d the high densities<br />
is shielded <strong>and</strong> cold (but >10 K)<br />
color represents<br />
column density