Measurements of the CO-to-H 2 Conversion Factor and Dust-to-Gas ...
Measurements of the CO-to-H 2 Conversion Factor and Dust-to-Gas ...
Measurements of the CO-to-H 2 Conversion Factor and Dust-to-Gas ...
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Our Technique:<br />
Minimizing Scatter in DGR on kpc scales<br />
car<strong>to</strong>on <strong>of</strong> what happens <strong>to</strong> DGR<br />
when α<strong>CO</strong> is adjusted<br />
DGR =<br />
Σdust<br />
ΣHI +α<strong>CO</strong>I<strong>CO</strong><br />
assume DGR & Xco<br />
constant in this region<br />
I<strong>CO</strong>/ΣHI<br />
• both <strong>CO</strong> <strong>and</strong> H I are detected<br />
Need good S/N maps <strong>of</strong> <strong>CO</strong> & HI.<br />
• a range <strong>of</strong> I<strong>CO</strong>/ΣHI values are present<br />
Need many resolution elements.<br />
• region is small, ok <strong>to</strong> assume DGR & Xco ~ constant<br />
Must select small chunk <strong>of</strong> galaxy, so need high resolution.
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