NIHAO-XXIII: Dark Matter density shaped by Black Hole feedback

We present a systematic analysis of the reaction of darkmatter distribution to galaxy formation across more than eight orders of magnitude in stellar mass. We extend the previous work presented in the NIHAO-IV paper by adding 46 new high-resolution simulations of massive galaxies performed with the inclusion of black hole feedback. We showthat outflows generated by the active galactic nucleus (AGN) are able to partially counteract the darkmatter contraction due to the large central stellar component in massive haloes. The net effect is to relax the central dark matter distribution that moves to a less cuspy density profiles at halo mass larger than approximate to 3 x 10(12) M-circle dot. The scatter around the mean value of the density profile slope (alpha) is fairly constant (Delta alpha approximate to 0.3), with the exception of galaxies with halo masses around 10(12) M-circle dot, at the transition from stellar to AGN feedback dominated systems, where the scatter increases by almost a factor of 3. We provide useful fitting formulae for the slope of the dark matter density profiles at few per cent of the virial radius for the whole stellar mass range: 10(5)-10(12) M-circle dot (2 x 10(9) to 5 x 10(13) M-circle dot in halo mass).