Oral Presentation
Dusty massive galaxies in the cluster lensing fields revealed with ALMA and SCUBA2
Presenter: Xinwen Shu (Anhui Normal University)
Surveys with Herschel, SCUBA2 and recently ALMA have greatly enriched our knowledge of the distant universe by discovering not only a population of optical invisible galaxies but also the bulk of normal star-forming galaxies at z>1.5 down to LIR~10^12 Lsun. The AGN and dust properties are of great interests in these dusty, so-called submillimeter galaxies. I will present a comprehensive study of a extremely dusty galaxy likely at z~>4 that hosts the strongest AGN activity ever found. In addition, the results from our ALMA 870um survey of dusty massive galaxies in the cluster lensing fields will be presented. A surprisingly high fraction of sources (~80%) are detected down to S870-0.5 mJy. This fraction is higher than the black fields likely due to the lensing effect, confirming the presence of a bulk of massive star-forming galaxies in the distant universe that are missed in previous optical/NIR surveys even with HST.
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