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- W3104346782 abstract "We present sensitive phase-referenced Very Long Baseline Interferometry (VLBI) results on the radio continuum emission from the z = 1.87 luminous submillimeter galaxy (SMG) GOODS 850-3. The observations were carried out at 1.4 GHz using the High-Sensitivity Array (HSA). Our sensitive tapered VLBI image of GOODS 850-3 at 047 × 034 (3.9 × 2.9 kpc) resolution shows a marginally resolved continuum structure with a peak flux density of 148 ± 38 μJy beam−1, and a total flux density of 168 ± 73 μJy, consistent with previous Very Large Array and MERLIN measurements. The deconvolved size of the source is 027(±012) × <023, or 2.3(±1.0) × <1.9 kpc, and the derived intrinsic brightness temperature is >(5 ± 2) × 103 K. The radio continuum position of this galaxy coincides with a bright and extended near-infrared source that nearly disappears in the deep Hubble Space Telescope optical image, indicating a dusty source of nearly 9 kpc in diameter. No continuum emission is detected at the full VLBI resolution (13.2 × 7.2 mas, 111 × 61 pc), with a 4σ point source upper limit of 26 μJy beam−1, or an upper limit to the intrinsic brightness temperature of 4.7 × 105 K. The extent of the observed continuum source at 1.4 GHz and the derived brightness temperature limits are consistent with the radio emission (and thus presumably the far-infrared emission) being powered by a major starburst in GOODS 850-3, with a star formation rate of ∼2500 M☉ yr−1. Moreover, the absence of any continuum emission at the full resolution of the VLBI observations indicates the lack of a compact radio-loud active galactic nucleus in this z = 1.87 SMG." @default.
- W3104346782 created "2020-11-23" @default.
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- W3104346782 date "2010-03-11" @default.
- W3104346782 modified "2023-10-16" @default.
- W3104346782 title "HIGH-SENSITIVITY ARRAY OBSERVATIONS OF THEz= 1.87 SUBMILLIMETER GALAXY GOODS 850-3" @default.
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- W3104346782 doi "https://doi.org/10.1088/0004-6256/139/4/1622" @default.
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