Submillimetre detection of the z=2.83 Lyman-break galaxy, Westphal–MM8, and implications for SCUBA2 |
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| Authors: | S C Chapman † C M Casey |
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| Institution: | Institute of Astronomy, Madingley Road, Cambridge CB3 0HA;Department of Physics and Astronomy, University of Victoria, Victoria, BC, V8P 1A1, Canada |
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| Abstract: | We present confusion-limited submillimetre (submm) observations with the Submillimetre Common-User Bolometer Array (SCUBA) camera on the James Clerk Maxwell Telescope of the z = 2.83 Lyman-break galaxy (LBG), Westphal–MM8, reaching an 850 μm sensitivity even greater than that achieved in the SCUBA map of the Hubble Deep Field region. The detection of MM8 ( S 850 μm= 1.98 ± 0.48 mJy) , along with the literature submm detections of lensed LBGs, suggests that the LBG population may contribute significantly to the source counts of submm-selected galaxies in the 1–2 mJy regime. Additionally, submm-luminous LBGs are a viable progenitor population for the recently discovered evolved galaxies at z ～ 2–2.5 . These observations represent an important baseline for SCUBA2 observations which will regularly map large regions of the sky to this depth. |
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| Keywords: | galaxies: active galaxies: formation galaxies: individual: Westphal–MM8 infrared: galaxies |
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