The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey - IX. \ub9\ub2CO J = 3\u21922 observations of NGC 2976 and NGC 3351
- Tan, Boon-Kok
- Leech, J.
- Rigopoulou, D.
- Warren, B. E.
- Wilson, C. D.
- Attewell, D.
- Azimlu, M.
- Bendo, G. J.
- Butner, H. M.
- Brinks, E.
- Chanial, P.
- Clements, D. L.
- Heesen, V.
- Israel, F.
- Knapen, J. H.
- Matthews, H. E.
- Mortier, A. M. J.
- M\ufchle, S.
- S\ue1nchez-Gallego, J. R.
- Tilanus, R. P. J.
- Usero, A.
- van der Werf, P.
- Zhu, M.
DOIAbstract
We present \ub9\ub2CO J = 3\u21922 maps of NGC 2976 and NGC 3351 obtained with the James Clerk Maxwell Telescope (JCMT), both early targets of the JCMT Nearby Galaxy Legacy Survey (NGLS). We combine the present observations with \ub9\ub2CO J = 1\u21920 data and find that the computed \ub9\ub2CO J = 3\u21922 to \ub9\ub2CO J = 1\u21920 line ratio (R31) agrees with values measured in other NGLS field galaxies. We compute the MH2 value and find that it is robust against the value of R31 used. Using HI data from The HI Nearby Galaxy Survey, we find a tight correlation between the surface density of H2 and star formation rate density for NGC 3351 when \ub9\ub2CO J = 3\u21922 data are used. Finally, we compare the \ub9\ub2CO J = 3\u21922 intensity...
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