Measurements of the CO-to-H 2 Conversion Factor and Dust-to-Gas ...

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The Observations DGR = ΣD/(ΣHI +αCOICO) THINGS The HI Nearby Galaxies Survey HI survey of 34 nearby galaxies with the VLA Walter et al. (2008) Resolution of ~12” HI column density determined directly from 21cm line.
The Observations DGR = ΣD/(ΣHI +αCOICO) HERACLES HERA CO-Line Emission Survey CO J=(2-1) survey of 48 nearby galaxies with HERA on the IRAM 30m. Leroy et al. (2009) Resolution of ~13” Assume (2-1)/(1-0) = 0.7 average for HERACLES sample (Rosolowsky et al., in prep)
Page 1 and 2: Measurements of the CO-to-H2 Conver
Page 3 and 4: Other ways to trace the total amoun
Page 5 and 6: Other ways to trace the total amoun
Page 7 and 8: Measuring the Conversion Factor wit
Page 9 and 10: Our Technique: Minimizing Scatter i
Page 11 and 12: Our Technique: Minimizing Scatter i
Page 13 and 14: Example of the Technique
Page 15: The Observations DGR = ΣD/(ΣHI +
Page 19 and 20: NGC0628 Results
Page 27 and 28: Variations we see in αCO • MW α
Page 29 and 30: NGC 0628 0.2 dex radial profiles fr
Page 41 and 42: What drives variations in αCO? NGC
Page 43 and 44: Dust-to-Gas Ratio Linear trend with
Page 45 and 46: Metallicity isn’t everything... I
Page 47 and 48: What drives variations in αCO? αC
Page 49 and 50: Azimuthal Variations in NGC 6946 Lo
Page 51 and 52: Disagreement with Virial Mass αCO
Page 53 and 54: Our conversion factors makes some g

Measurements of the CO-to-H 2 Conversion Factor and Dust-to-Gas ...

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