Gravitational torques imply molecular gas inflow towards the nucleus of M 51
Querejeta, M; Meidt, SE; Schinnerer, E; et al.García-Burillo, S; Dobbs, CL; Colombo, D; Dumas, G; Hughes, A; Kramer, C; Leroy, AK; Pety, J; Schuster, KF; Thompson, TA
Date: 14 March 2016
Astronomy and Astrophysics
© 2016 ESO.The transport of gas towards the centre of galaxies is critical for black hole feeding and, indirectly, it can control active galactic nucleus (AGN) feedback. We have quantified the molecular gas inflow in the central R< 1 kpc of M 51 to be 1 M⊙/yr, using a new gravitational torque map and the molecular gas traced by the ...
© 2016 ESO.The transport of gas towards the centre of galaxies is critical for black hole feeding and, indirectly, it can control active galactic nucleus (AGN) feedback. We have quantified the molecular gas inflow in the central R< 1 kpc of M 51 to be 1 M⊙/yr, using a new gravitational torque map and the molecular gas traced by the Plateau de Bure Interferometer Arcsecond Whirlpool Survey (PAWS). The nuclear stellar bar is responsible for this gas inflow. We also used torque profiles to estimate the location of dynamical resonances, and the results suggest a corotation for the bar CRbar ∼ 20″, and a corotation for the spiral CRsp ∼ 100″. We demonstrate how important it is to correct 3.6 μm images for dust emission when gravitational torques are to be computed, and we examine further sources of uncertainty. Our observational measurement of gas inflow can be compared with nuclear molecular outflow rates and provide useful constraints for numerical simulations.
Physics and Astronomy
College of Engineering, Mathematics and Physical Sciences
Item views 0
Full item downloads 0
Showing items related by title, author, creator and subject.
Calzetti, D; Johnson, KE; Adamo, A; et al. (American Astronomical Society, 24 September 2015)The nearby dwarf starburst galaxy NGC5253 hosts a number of young, massive star clusters, the two youngest of which are centrally concentrated and surrounded by thermal radio emission (the `radio nebula'). To investigate ...
Grasha, K; Calzetti, D; Adamo, A; et al. (Oxford University Press (OUP) / Royal Astronomical Society, 19 December 2018)We present a study correlating the spatial locations of young star clusters with those of molecular clouds in NGC 5194, in order to investigate the time-scale over which clusters separate from their birth clouds. The star ...
Kahre, L; Walterbos, RA; Kim, H; et al. (American Astronomical Society / IOP Publishing, 16 March 2018)We present a study of the dust-to-gas ratios in five nearby galaxies: NGC 628 (M74), NGC 6503, NGC 7793, UGC 5139 (Holmberg I), and UGC 4305 (Holmberg II). Using Hubble Space Telescope broadband WFC3/UVIS UV and optical ...