Dust during Reionization

The first generation of stars produced energetic photons, thereby ionizing the thitherto neutral universe. The ionization effectively worked as a veil, obscuring correlations in the Cosmic Microwave Background (CMB) on small angular scales. In parallel, the first generation of stars also ejected large amounts of dust - thereby laying ground for the coming generation of stars. The dust also covered the CMB somewhat, particularly where the matter density was high. The objective of this presentation is to explain the importance of this early dust.

The presentation will be in English but I will be happy to answer any question in French.