CfA OIR Division Lunch Talks
Wednesday, April 10, 2013, 11:00 am, A Building Classroom
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Gravitationally Lensed Sub-millimeter Galaxies
Discovered by Herschel

Shane Bussmann (CfA)

Wide-field surveys conducted by the Herschel Space Observatory have discovered an exciting population of submillimeter galaxies (SMGs) at z>2 that are gravitationally lensed by an intervening galaxy or group of galaxies along the line of sight. These systems are extremely useful probes of galaxy evolution because they act as cosmic telescopes that amplify the brightness of the background source -- facilitating follow-up observations -- and because they provide an independent measurement of the mass of the foreground lens(es). I will demonstrate how a true multi-wavelength approach is critical to understanding these systems, including a presentation of MMT and Gemini-South optical spectroscopy as well as high spatial resolution Submillimeter Array (SMA) imaging. I will summarize what we have learned about the background lensed SMGs and the foreground lensing galaxies and end with a discussion of the directions in which future progress is most needed.