Speaker
Prof.
Jordi Miralda-Escudé
(ICREA, Barcelona)
Description
The Baryon Oscillations Spectroscopic Survey of SDSS-III has opened a new era for high-redshift large-scale structure surveys using spectra of intervening absorption. On large scales, the 3D redshift space linear power spectrum can be measured, as modified with two bias parameters for the Lyα forest, for density and peculiar velocity gradient. On small scales, the detailed physics of the intergalactic medium can be probed from the observed 3D and 1D power spectra, comparing them to the predictions of cosmological simulations. Fluctuations in the radiation intensity from ionizing sources also have an impact on the measured power spectra.
