I study how galaxies and galaxy clusters form, grow, and evolve throughout their cosmic lifetimes by observing their intense star-formation and merging activity with extra-galactic (sub)millimeter and radio-waveband observations. “Submillimeter galaxies” (SMGs; Blain et al 2002), distant galaxies with extremely high star-formation rates, are of particular interest to me because as a population they may be responsible for producing a significant fraction of all stellar mass in present-day galaxies.
In Lindner et al. (2011), we present 1.2mm imaging of the central 566 sq arcmin of the Lockman Hole North, including 41 SMG detections with S/N > 4.0. In a follow-up study of this sample’s stacked X-ray properties, we detect strong Fe Kα emission (Lindner et al. 2012), an X-ray spectral feature that can help us disentangle the effects of star formation from accretion in SMGs.