Thursday

I will present new results on the evolution of UV properties in our sample of ~4000 Lyman-alpha emitters (LAEs) in the COSMOS field (SC4K, Sobral et al. 2018a). Our LAEs are uniformly selected in the wide redshift range z~2-6 using 16 narrow/medium-bands, allowing us to probe the evolution of LAEs from the end of reionisation until cosmic noon. We explore data from UV to FIR to constrain the spectral energy distribution (SED) of each galaxy (and the average of different populations) and derive stellar masses, star formation rates, UV luminosities (MUV) and UV beta slopes. We measure little to no redshift evolution of rest-frame equivalent width which suggests no evolution in Lyman-alpha escape fraction. We find that our LAEs typically have low stellar masses (average ~10^9 Msun) and are typically located above the "star formation main sequence" which indicates a more bursty star formation nature than "normal" galaxies. Our LAEs are typically bluer than UV-selected Lyman Break Galaxies at similar redshifts (~0.5 dex at z~2-3), suggesting they always constitute the youngest and most metal-poor component of the UV-selected sources.