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 ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Summary<br />
• α <strong>CO</strong> can vary by fac<strong>to</strong>r <strong>of</strong> 10 in nearby galaxies -<br />
especially low in <strong>the</strong>ir centers.<br />
• Metallicity not a key driver <strong>of</strong> α <strong>CO</strong> at Z~Z ⊙◉☉⨀ <strong>and</strong> above.<br />
Expected if main effect is <strong>to</strong> change dust shielding <strong>and</strong><br />
alter “<strong>CO</strong>-dark” gas layer.<br />
• Low measured α <strong>CO</strong> enhances SFE in some galaxy centers<br />
over predictions with fixed converison fac<strong>to</strong>r.<br />
• Temperature & velocity dispersion <strong>of</strong> molecular gas are<br />
probably crucial drivers <strong>of</strong> α<strong>CO</strong>.
Change language