The Interstellar Medium and Gas Dynamics of High Redshift Dusty Star-Forming Galaxies and Quasars

Dusty star-forming galaxy (DSFG) is the main contributor to the buildup of stellar and black holes masses in the Universe, which took place rapidly between redshifts of z=1-3. Both star formation and active galactic nucleus (AGN) activity are related to the gas content and dynamics of their host galaxies, which in turn shape their subsequent evolution to the present epoch. In this talk, I will present our recent findings in characterizing the interstellar medium of DSFGs and powerful quasars using multi-wavelength photometry and CO- and [CII]- line imaging obtained with telescopes such as ALMA, VLA, PdBI, and SMA. I will show some of our findings from studying highly-magnified quasars under the cosmic lens provided by gravitational lensing. Using the Herschel Space Observatory, we have identified a rare sample of strongly-lensed DSFGs or HyLIRGs at the peak epoch of cosmic star formation. I will focus on the most massive z~3 "main-sequence" disk galaxy discovered in the sample. I will end by discussing the implications of these studies in the context of galaxy formation and evolution.