Speaker
Chi Zhang
(Purple Mountain Observatory)
Description
We present, for the first time, the gas and HI distributions in and around haloes in the TNG universe for three alternative dark-matter models: SIDM, velocity-dependent SIDM, and WDM. We show how these models affect HI and the resulting Lyman-$\alpha$ spectra. We show how gas and HI density profiles change with halo mass and redshift with alternative DM. Finally, we compute the galaxy–Lyman-$\alpha$ cross-correlation function to test whether observations can distinguish these models.
Primary author
Chi Zhang
(Purple Mountain Observatory)
