![]() In the early Universe, typical massive SFGs converted molecular gas into stars more efficiently than present-day galaxies do. I find that over the past 10 Gyr, the star formation rate per unit area in massive SFGs has declined at a rate that is related to the molecular gas content. On the other hand, I find that massive SFGs with enhanced star formation rates show more compact activity, which is consistent with expectations that star formation here is triggered by galaxy mergers that induce nuclear starbursts. I find that over the past 10 Gyr (redshift < 2) star formation in typical massive SFGs occurred out to large radii, strengthening the (previously) proposed scenario whereby typical massive SFGs are rotating disks with widespread star formation activity. I inspect the spatial distribution of star formation (traced by radio continuum emission) in galaxies of the sample, and investigate how their molecular gas content (traced by carbon monoxide line emission) affected the star formation activity. ![]() I analyze observations at sub-millimeter-to-radio wavelengths of a large sample of 3184 massive SFGs in the COSMOS field. I investigate possible differences in physical processes that regulate star formation throughout cosmic history, to address why typical massive galaxies in the early Universe formed stars an order of magnitude more intensely than today. I focus on the population of massive SFGs with a total stellar mass that is one to ten times that of the Milky Way. My work aims to measure the structural evolution of star-forming galaxies (SFGs), from the present back to when the Universe was ten percent of its current age. It is not well understood what processes regulate the global formation of stars in galaxies throughout cosmic history. ![]()
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