The JCMT Nearby Galaxies Legacy Survey VI: The distribution of gas and star formation in M81

We present the first complete 12CO J = 3−2 map of M81, observed as part of the Nearby Galaxies Legacy Survey being carried out at the James Clerk Maxwell Telescope. We detect nine regions of significant CO emission located at different positions within the spiral arms, and confirm that the global CO emission in the galaxy is low. We combine these data with a new Hα map obtained using the Isaac Newton Telescope and archival H i, 24 µm, and FUV images to uncover a correlation between the molecular gas and star forming regions in M81. For the nine regions detected in CO J = 3 − 2, we combine our CO J = 3 − 2 data with existing CO J = 1 − 0 data t