Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..408..405y&link_type=abstract
The Starburst-AGN Connection. ASP Conference Series, Vol. 408, proceedings of the conference held 27-31 October 2008, at Shangha
Astronomy and Astrophysics
Astronomy
Scientific paper
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 M_&sun; 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.
Ashby Matthew L. N.
Blundell Ray
Fazio Giacomo
Gurwell Mark A.
Huang Sheng-Jun
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