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Paper: Are the Most Luminous Submillimeter Galaxies Eddington Limited Starbursts?
Volume: 408, The Starburst−AGN Connection
Page: 405
Authors: Younger, J.D.; Fazio, G.G.; Wilner, D.J.; Ashby, M.L.N.; Blundell, R.; Gurwell, M.A.; Huang, J.-S.; Iono, D.; Peck, A.B.; Scott, K.S.; Wilson, G.W.; Yun, M.S.
Abstract: We present high resolution submillimeter interferometric imaging of two of the brightest high redshift submillimeter galaxies known: GN20 and AzTEC1 at 0.3 and 0.8 arcsec resolution respectively. Our data − the highest resolution submillimeter imaging of high redshift sources accomplished to date − was collected in three different array configurations: compact, extended, and very extended.We derive angular sizes of 0.6 and 1.0 arcsec for GN20 and 0.3 and 0.4 arcsec for AzTEC1 from modeling their visibility functions as a Gaussian and elliptical disk respectively. We find preliminary evidence that these hyperluminous starbursts − with star formation rates > 1000 Mʘ yr−1 − are radiating at or close to their Eddington limit. Should future high resolution observations indicate that these two objects are typical of a population of high redshift Eddington−limited starbursts, this could have important consequences for models of star formation and feedback in extreme environments.
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