NICMOS imaging of submillimeter galaxies with CO and PAH redshifts

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Scientific paper

We propose to obtain F110W and F160W imaging of 10 z~2.4 submillimeter galaxies SMGs whose optical redshifts have been confirmed by the detection of millimeter CO and/or mid-infrared PAH emission. With the 4000A break falling within/between the two imaging filters, we will be able to study these sources' spatially resolved stellar populations modulo extinction in the rest-frame optical. SMGs' large luminosities appear to be due largely to merger-triggered starbursts; high-resolution NICMOS imaging will help us understand the stellar masses, mass ratios, and other properties of the merger progenitors, valuable information in the effort to model the mass assembly history of the universe.;

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