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Gravitationally lensed sub-millimeter galaxies at high redshift

Event Details

Event Dates: 

Friday, December 14, 2012 - 5:00am

Speaker Name(s): 

Shane Bussmann

Speaker Affiliation(s): 

Seminar Type/Subject

Event Details & Abstract: 

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 (1) they act as cosmic telescopes that amplify the brightness of the background source, facilitating follow-up observations; and (2) they provide an independent measurement of the mass of the foreground lens(es). I will present high spatial resolution Submillimeter Array (SMA) imaging of lensed SMGs discovered by Herschel and describe a novel technique to model each lens system in the visibility plane (as is appropriate for an interferometer like the SMA). I will summarize what we have learned about the nature of galaxy evolution based on these studies and highlight some interesting paths ahead for the near future, with a particular emphasis on opportunities for new facilities such as ALMA and CCAT.