A 2-3 mm high-resolution molecular line survey towards the centre of the nearby spiral galaxy NGC 6946
- Eibensteiner, C.
- Barnes, A. T.
- Bigiel, F.
- Schinnerer, E.
- Liu, D.
- Meier, D. S.
- Usero, A.
- Leroy, A. K.
- Rosolowsky, E.
- Puschnig, J.
- Lazar, I.
- Pety, J.
- Lopez, L. A.
- Emsellem, E.
- Bešlić, I.
- Querejeta, M.
- Murphy, E. J.
- den Brok, J.
- Schruba, A.
- Chevance, M.
- Glover, S. C. O.
- Gao, Y.
- Grasha, K.
- Hassani, H.
- Henshaw, J. D.
- Jimenez-Donaire, M. J.
- Klessen, R. S.
- Kruijssen, J. M. D.
- Pan, H. -A.
- Saito, T.
- Sormani, M. C.
- Teng, Y. -H.
- Williams, T. G.
DOIAbstract
International audienceThe complex physical, kinematic, and chemical properties of galaxy centres make them interesting environments to examine with molecular line emission. We present new 2 − 4″ (∼75 − 150 pc at 7.7 Mpc) observations at 2 and 3 mm covering the central 50″ (∼1.9 kpc) of the nearby double-barred spiral galaxy NGC 6946 obtained with the IRAM Plateau de Bure Interferometer. We detect spectral lines from ten molecules: CO, HCN, HCO+, HNC, CS, HC3N, N2H+, C2H, CH3OH, and H2CO. We complemented these with published 1 mm CO observations and 33 GHz continuum observations to explore the star formation rate surface density ΣSFR on 150 pc scales. In this paper, we analyse regions associated with the inner bar of NGC 6946 - the nuclear r...
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