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Comprehensive and systematic studies of the molecular content of galaxies during the epochs that are associated with the peak (z~1-2), and subsequent winding down (z<1) of star formation in the Universe are enabling us to illustrate the important role that cold gas, , the fuel for star formation, has played in the assembly of galaxies across cosmic time. Surveys, including COLDGASS and PHIBSS1&2, already provide robust molecular gas detections in hundreds of normal, star forming galaxies, from redshifts 0-2.5. In this talk, we focus on results from PHIBSS, comprising two IRAM Large Programs, where we are we have are mapping the CO J=3-2 or J-2-1 line emission in ~200 such galaxies from z=0.5-2.5; we find that galaxies at these epochs are very gas rich, relative to their star-forming counterparts in the local Universe. We discuss scaling relations for massive star forming galaxies that we derive from these data, and the impact of all of these new observations on our understanding of galaxy evolution in the early Universe.
The multi-national SOLA (Soul of Lupus with ALMA) consortium has initiated a very large program to conduct comprehensive studies of the Lupus Molecular Clouds and their star formation processes. The long-term goal is to exploit ALMA and other growing observational capabilities in the southern hemisphere to establish the Lupus region as a prototypical low-mass star forming region on a par with, for example, the Taurus clouds in the northern sky. In this talk, I present how I started the SOLA project and how I managed the team together with the latest status.
