# Astrophysics - Astrophysics of Galaxies

## Variations of Observed Lyman-α Spectra Shapes due to the Intergalactic Absorption

Lyman-$\alpha$ (Ly$\alpha$) spectra provide insights into the small-scale structure and kinematics of neutral hydrogen (HI) within galaxies as well as the ionization state of the intergalactic medium (IGM). The former defines the intrinsic spectrum …