9-13 September 2019
University of Geneva A100 Sciences II
Europe/Zurich timezone

Chemical enrichment and ionizing escape fraction from observations of GRBs

10 Sep 2019, 15:50


Prof. Nial Tanvir (University of Leicester)


Gamma-ray bursts can be seen to very high redshifts, and the bright power-law continua of their afterglows provide ideal backlights for absorption lines studies. I will review what we have learnt from GRBs about evolving chemical abundances in the early universe; and consider the implications of the high HI column densities seen on the sight lines to GRBs for the escape fraction of ionizing radiation from massive stars. I will also review the importance of the kilonovae accompanying short-duration GRBs for the nucleosynthesis of heavy elements.

Primary author

Prof. Nial Tanvir (University of Leicester)

Presentation Materials