Gravitational torques imply molecular gas inflow towards the nucleus of M 51 M. Querejeta, S. E. Meidt, E. Schinnerer, S. García-Burillo, C. L. Dobbs, D. Colombo, G. Dumas, A. Hughes, C. Kramer, A. K. Leroy et al. (3 more) A&A, 588 (2016) A33 Published online: 14 March 2016 DOI: 10.1051/0004-6361/201527536