EVOLUTION OF STELLAR-TO-HALO MASS RATIO AT z=0-7 IDENTIFIED BY CLUSTERING ANALYSIS WITH THE HUBBLE LEGACY IMAGING AND EARLY SUBARU/HYPER SUPRIME-CAM SURVEY DATA

We present clustering analysis results from 10,381 Lyman break galaxies (LBGs) at z similar to 4-7, identified in the Hubble legacy deep imaging and new complimentary large-area Subaru/Hyper Suprime-Cam data. We measure the angular correlation functions of these LBGs at z similar to 4, 5, 6, and 7 and fit these measurements using halo occupation distribution (HOD) models that provide an estimate of halo masses, M-h similar to (1-20) x 10(11) M-circle dot. Our M-h estimates agree with those obtained by previous clustering studies in a UV-magnitude versus M-h plane and allow us to calculate stellar-to-halo mass ratios (SHMRs) of LBGs. By comparison with the z similar to 0 SHMR, we identify evolution of the SHMR from z similar to 0 to z similar to 4 and from z similar to 4 to z similar to 7 at the > 98% confidence levels. The SHMR decreases by a factor of similar to 2 from z similar to 0 to 4 and increases by a factor of similar to 4 from z similar to 4 to 7 at the dark matter halo mass of M-h similar to 10(11) M circle dot. We compare our SHMRs with results of a hydrodynamic simulation and a semianalytic model and find that these theoretical studies do not predict the SHMR increase from z similar to 4 to 7. We obtain the baryon conversion efficiency (BCE) of LBGs at z similar to 4 and find that the BCE increases with increasing dark matter halo mass. Finally, we compare our clustering+HOD estimates with results from abundance matching techniques and conclude that the M-h estimates of the clustering+HOD analyses agree with those of the simple abundance matching within a factor of 3, and that the agreement improves when using more sophisticated abundance matching techniques that include subhalos, incompleteness, and/or evolution in the star formation and stellar mass functions.