Title: Caught in the Spiderweb

Speaker: Dr. Helmut Dannerbauer （IAC, Spain）

Time: 15:30pm, May 6, 2025

Location: 5-516, PMO Xianlin Campus

Abstract: The impact of environment on the built-up of massive galaxies in the early universe is still highly debated. Through observations with JWST and ALMA, we study in the detail different components of the cold interstellar medium of dozens of galaxies in the field and in one of the best-studied galaxy clusters in formation at z=2, cosmic noon. This is the peak epoch of quasar, star formation activity and the stellar growth of galaxies. Our unique sample of field and (proto)cluster members consists mainly of dusty star-forming galaxies. Through the census of dust, molecular gas and hydrogen recombination lines emissions and its morphology, we verify if processes of gas feeding, feedback and consumption (i.e. star formation efficiency, gas fractions) are driven with the same mechanisms in the field and in high density fields or not. This will allow us to quantify the impact of environment on the formation and evolution of (dusty) massive, star-forming galaxies. We will present the results of our study and thus demonstrate the indispensable synergy between JWST and ALMA for a better understanding of galaxy evolution and formation in the distant universe.