MCMC determination of the cosmic UV background at $z\simeq 0$ from H$\alpha$ fluorescence

Davide Caruso, Francesco Haardt, Michele Fumagalli +1

In a recent paper (Fumagalli et al. 2017) we reported on the detection of a diffuse H$\alpha$ glow in the outskirts of the nearby, edge-on disc galaxy UGC 7321 observed with the Multi U…