Dust emission from Lyman-break galaxies

We developed a model for the spectral energy distribution (SED) of Lyman-break galaxies (LBGs). In order to examine the grain size distribution of dust, we calculated the SEDs based on two distinct type of the distribution models: a single-sized distribution and a power-law distribution with a slope of dn/da ∝ a−3.5. We found that the single-sized and power-law dust size distributions yield a very similar detectability of LBGs at submillimeter wavelengths. We also found that galaxies with a power-law dust distribution have much less flux at mid-infrared.