RSAA Colloquia / Seminars / Feast-of-Facts: Thursday, 21 March 2019, 11:00-12:00; CSO Common Room

Jiasheng Huang

"CFHT Large-Area U-band Deep Survey (CLAUDS)"

Next generation galaxy surveys will be no longer either wide-field shallow surveys or ultra-deep surveys with small coverage. They will have both very wide-field coverage and very deep depth. The goal is not only just to detect galaxies at high redshifts, but also measure their large scale structures and then estimate their dark halos and their evolution at various redshifts. Japan-Princeton Subaru HyperSuprimCam(HSC) survey is one of this kind. The HSC survey aims to perform a galaxy survey reaching the same spatial volume as SDSS but detecting galaxies at much higher redshifts, and to provide targets for the next generation spectroscopic survey PFS. The CFHT Large-Area U-band Deep Survey (CLAUDS) is a deep U-band imaging in the HSC fields carried by a joint team from China, Canada and France with 3 PIs, each from one participating country respectively. The HSC+CLAUDS data permit studying galaxies at z=3 and below. With the U-band limiting magnitude of U=27.5 and a coverage of 15 deg^2, we already have about 1 million LBGs at z=3 and 2 millions of BM/BX sources at z~2. This is the largest LBG/BM/BX sample, providing a chance to explore the large scale structure at z>2.