Daichi KASHINO
(ETH Zurich)
The relationship between galaxies and dark matter halos is an essential key to understand how and in what environments galaxies form and evolve through cosmic time. We measure the spatial clustering of "main-sequence" star-forming galaxies at 1.43<z<1.74 using the FMOS-COSMOS near-infrared spectroscopic survey to learn the properties of dark halos hosting the epoch's secular population of galaxies. The projected correlation function is measured for a sample of 516 galaxies down to stellar mass of 10^9.6Msun and SFR~15 Msun/yr. We find that these galaxies live in halos of M_halo=5x10^12 Msun on average, which will likely become present-day halos equivalent to the typical mass scale of galaxy groups. We then constrain the stellar-to-halo mass ratio at M_halo < 10^12 Msun and find a systematically lower mass ratio than those measured at higher masses as indicative of the suppression of star formation in less massive galaxies.