#contents ** No. 301: April 13 (Thu), 2017, 15:30 - 16:30 [#b56ab32b] *** Speaker: Tao WANG (IoA/U.Tokyo, NAOJ) [#p03d9bad] *** Title: New insights into the formation of the most massive galaxies at high redshifts [#q6c04e28] Abstract: One of the most fundamental questions in galaxy formation and evolution is to understanding the establishment of the Hubble sequence, particularly how blue, star-forming galaxies are transformed into red, quiescent galaxies. In this talk I will present some new insights into this question based on recent observational results at high redshift, primarily at z > 2, and discuss how star-formation is regulated and quenched in massive galaxies and what are the possible roles of environment and supermassive black holes in this process. Specifically, I will show how ALMA unveils a significant population of promising progenitors of the earliest-quenched galaxies at z~4, and how we captured the onset of environmental effects on massive galaxy evolution in the most distant galaxy clusters at z=2.5. Language: English