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The Submillimetre Properties of Lyman Break Galaxies

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Lyman-Break Galaxies (LBGs) are the largest population of high-redshift (z>3) star forming galaxies and as such provide valuable insights into the mass assembly of normal galaxies during the first few Gyr of the Universe. They have moderate star formation rates (10s-100s Msun/yr) and they have 10-100x higher space densities than the more extreme submillimetre galaxy population, thus they should comprise a significant portion of the far-infrared background at high redshift. But determining their true contribution to the far-infrared background has been difficult due to the rather large uncertainties that go hand-in-hand with deriving dust corrected UV luminosities and star formation rates. The only reliable way of measuring the dust content of LBGs is directly through submillimetre observations, which has had a very patchy record at best, making it difficult to say anything conclusive, until now. In this talk I will present some new results using some of the best submm data around from the SCUBA2 Cosmology Legacy Survey.

This talk is part of the Cavendish Astrophysics Seminars series.

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