Sub-mm counterparts to Lyman-break galaxies

Details Sub-mm counterparts to Lyman-break galaxies Sub-mm counterparts to Lyman-break galaxies

2000-09-11

arxiv.org/abs/astro-ph/0009152v1

Astronomy and Astrophysics

Astrophysics

6 pages, 1 figure, contributed talk at UMass/INAOE Conference ``Deep Millimeter Surveys''

Scientific paper

We summarize the main results from our SCUBA survey of Lyman-break galaxies (LBGs) at z~3. Analysis of our sample of LBGs reveals a mean flux of S850=0.6$\pm$0.2 mJy, while simple models of emission based on the UV properties predict a mean flux about twice as large. Known populations of LBGs are expected to contribute flux to the weak sub-mm source portion of the far-IR background, but are not likely to comprise the bright source (S850>5 mJy) end of the SCUBA-detected source count. The detection of the LBG, Westphal-MM8, at 1.9 mJy suggests that deeper observations of individual LBGs in our sample could uncover detections at similar levels, consistent with our UV-based predictions. By the same token, many sub-mm selected sources with S850<2 mJy could be LBGs. The data are also consistent with the FarIR/$\beta$ relation holding at z=3.

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