High-Resolution Submillimeter Imaging of the Ly-alpha Blob1 in SSA 22

Abstract

We present ~2" resolution submillimeter observations of the submillimeter luminous giant Ly-alpha blob (LAB1) in the SSA 22 protocluster at redshift z=3.1 with the Submillimeter Array (SMA). Although the expected submillimeter flux density is 16 mJy at 880 micron, no emission is detected with the 2".4 x 1".9 (18 x 14 kpc) beam at the 3 sigma level of 4.2 mJy beam^{-1} in the SMA field of view of 35". This is in contrast to the previous lower angular resolution (15") observations where a bright (17 mJy) unresolved submillimeter source was detected at 850 micron toward the LAB1 using the Submillimeter Common-User Bolometer Array on the James Clerk Maxwell Telescope. The SMA non-detection suggests that the spatial extent of the submillimeter emission of LAB1 should be larger than 4" (>30 kpc). The most likely interpretation of the spatially extended submillimeter emission is that starbursts occur throughout the large area in LAB1. Some part of the submillimeter emission may come from spatially extended dust expelled from starburst regions by galactic superwind. The spatial extent of the submillimeter emission of LAB1 is similar to those of high redshift radio galaxies rather than submillimeter galaxies.

7 pages, 5 figures, accepted for publication in ApJ

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• Constraining Dust and Molecular Gas Properties in Lyman Alpha Blobs at z~3
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• Continuum Emission by Cooling Clouds
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• An AzTEC 1.1-mm Survey for ULIRGs in the field of the Galaxy Cluster MS 0451.6-0305
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• The Origin and Evolution of Lyman-alpha Blobs in Cosmological Galaxy Formation Simulations
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• ALMA Observations of Lyman-alpha Blob 1: Multiple major-mergers and widely distributed interstellar media
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