Thermal emission from bow shocks - I. 2D hydrodynamic models of the Bubble Nebula Samuel Green, Jonathan Mackey, Thomas J. Haworth, Vasilii V. Gvaramadze and Peter Duffy A&A, 625 (2019) A4 Published online: 29 April 2019 DOI: 10.1051/0004-6361/201834832