Prospects for observing the low-density cosmic web in Lyman-α emission Joris Witstok, Ewald Puchwein, Girish Kulkarni, Renske Smit and Martin G. Haehnelt A&A, 650 (2021) A98 Published online: 14 June 2021 DOI: 10.1051/0004-6361/202040187