Alison Crocker edited sectionData___subsec.tex  over 9 years ago

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For the resolved sample of 18 galaxies (excluding the point-source galaxies and the enuc region of M101), we are able to map the [CI] emission in 16 of them, shown in Fig.~\ref{fig:maps}. NGC 2976 and NGC 3077 have no detected [CI] emission. The [CI]370 line is more robustly detected than the [CI]609 line in all galaxies. (Why? Actually brighter? Better noise properties in this region of the spectrum?)  The majority of galaxies have centrally-peaked morphologies in \cithree [CI]370  (and similarly in \cisix, [CI]609,  when detected). Four galaxies have more linear appearances, NGC3521, NGC 4631 and NGC 7331 have a linear structure due to an edge-on disk while NGC 3627's linear shape can be attributed to it's extremely prominent bar. The ratio maps are all on the same logarithmic scale so color variations between galaxies may be compared. While the full range of [CI] ratios is only x dex, galaxy to galaxy variations are apparent. For instance, NGC 3521 and NGC 7331 have much lower ratios than the rest of the galaxies. NGC 6946 shows some evidence of a declining radial gradient in the [CI] ratio, while NGC 4631 may show the reverse, with higher values at a larger disk radius.