SIMBAD references

2008ApJ...688...59Y - Astrophys. J., 688, 59-66 (2008/November-3)

The physical scale of the far-infrared emission in the most luminous submillimeter galaxies.

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., PETITPAS G.R., SCOTT K.S., WILSON G.W. and YUN M.S.

Abstract (from CDS):

We present high-resolution submillimeter interferometric imaging of two of the brightest high-redshift submillimeter galaxies known: GN 20 and AzTEC1 at 0.8"and 0.3" resolution, respectively. Our data–the highest resolution submillimeter imaging of high-redshift sources accomplished to date–were collected in three different array configurations: compact, extended, and very extended. We derive angular sizes of 0.6" and 1.0" for GN 20 and 0.3" and 0.4" for AzTEC1 from modeling their visibility functions as a Gaussian and an elliptical disk, respectively. Because both sources are B-band dropouts, they likely lie within a relatively narrow redshift window around z∼4, which indicates their angular extent corresponds to physical scales of 4-8 and 1.5-3 kpc, respectively, for the starburst region. By way of a series of simple assumptions, we find preliminary evidence that these hyperluminous starbursts–with star formation rates >1000 M/yr–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.

Abstract Copyright:

Journal keyword(s): Cosmology: Observations - Galaxies: Evolution - Galaxies: Formation - Galaxies: High-Redshift - Galaxies: Starburst

Simbad objects: 15

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2021.06.19-21:45:01

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