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We present CO(1-0) and CO(2-1) maps of the interacting barred LINER/Seyfert 2galaxy NGC 3627 obtained with the IRAM interferometer at resolutions of 2.1" x1.3" and 0.9" x 0.6", respectively. The molecular gas emission shows a nuclearpeak, an elongated bar-like structure of ~18" (~900 pc) diameter in both COmaps and, in CO(1-0), a two-arm spiral feature from r~9" (~450 pc) to r~16"(~800 pc). The inner ~18" bar-like structure, with a north/south orientation(PA = 14{\deg}), forms two peaks at the extremes of this elongated emissionregion. The kinematics of the inner molecular gas shows signatures ofnon-circular motions associated both with the 18" bar-like structure and thespiral feature detected beyond it. The 1.6 micron H-band 2MASS image of NGC3627 shows a stellar bar with a PA = -21{\deg}, different from the PA (=14{\deg}) of the CO bar-like structure, indicating that the gas is leading thestellar bar. The torques computed with the HST-NICMOS F160W image and our PdBImaps are negative down to the resolution limit of our images, ~60 pc inCO(2-1). If the bar ends at ~3 kpc, coincident with corotation (CR), thetorques are negative between the CR of the bar and the nucleus, down to theresolution limit of our observations. This scenario is compatible with arecently-formed rapidly rotating bar which has had insufficient time to slowdown because of secular evolution, and thus has not yet formed an innerLindblad resonance (ILR). The presence of molecular gas inside the CR of theprimary bar, where we expect that the ILR will form, makes NGC 3627 a potentialsmoking gun of inner gas inflow. The gas is fueling the central region, and ina second step could fuel directly the active nucleus.

Molecular Gas in NUclei of GAlaxies (NUGA) XIV. The barred LINER/Seyfert 2 galaxy NGC 3627