Matthew Hayes
Department of Physics, Stockholm University (Stockholm, Suède)
to investigate the conditions in some of the first galaxies, as well as
their impact upon the ionization state of the intergalactic medium.
Specifically, I plan to address the average spectra of z>6 galaxies
observed with JWST, and what we have learned about their ionizing photon
production and nebular abundance patterns. I will address briefly the
surprisingly large numbers of active galactic nuclei that have recently
been identified at early times, and what this may mean for the formation
of supermassive black holes. I will finally present some recently-made
measurements of the sizes of ionized bubbles at z=6.5-11 based upon the
Lyman alpha emission line.
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris