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We present clustering analyses of identically-selected star-forming galaxiesin 3 narrow redshift slices (at z=0.8, z=1.47 and z=2.23), from HiZELS, a deep,near-infrared narrow-band survey. The HiZELS samples span the peak in thecosmic star-formation rate density, identifying typical star-forming galaxiesat each epoch. Narrow-band samples have well-defined redshift distributions andare therefore ideal for clustering analyses. We quantify the clustering of thethree samples, and of H-alpha luminosity-selected subsamples, initially usingsimple power law fits to the two-point correlation function. We extend thiswork to link the evolution of star-forming galaxies and their host dark matterhalos over cosmic time using sophisticated dark matter halo models. We findthat the clustering strength, r0, and the bias of galaxy populations relativeto the clustering of dark matter increase linearly with H-alpha luminosity(and, by implication, star-formation rate) at all three redshifts, as do thehost dark matter halo masses of the HiZELS galaxies. The typical galaxies inour samples are star-forming centrals, residing in halos of mass M_halo ~ a fewtimes 10^12M_solar. We find a remarkably tight redshift-independent relationbetween the H-alpha luminosity scaled by the characteristic luminosity,L(H-alpha)/L(H-alpha)*(z), and the minimum host dark matter halo mass ofcentral galaxies. This reveals that the dark matter halo environment is astrong driver of galaxy star-formation rate and therefore of the evolution ofthe star-formation rate density in the Universe.

The H-alpha luminosity-dependent clustering of star-forming galaxies from z~0.8 to z~2.2 with HiZELS