Community Research and Development Information Service - CORDIS


Final Report - MCMCLYMAN (Markov chain Monte Carlo reconstruction of the large-scale structure with the Lyman alpha forest)

Project ID: 221783
Funded under: FP7-PEOPLE


The main goal of this project was the characterisation of the cosmological large-scale structure (LSS) on different scales from the measurement of quasar absorption spectra tracing the intergalactic medium (IGM) through the Lya forest. In the current cosmological picture structures in the Universe are believed to have grown from tiny fluctuations through gravitational clustering. Nonlinear processes of structure formation destroy the information about the origin of our Universe. This information is encoded in the large scales in which structures are close to the linear regime.

The report provides a completely new state-of-the-art analysis of the intergalactic structure on small- and on large-scales. It includes charts of the mock quasar spectra assuming different equations of state, thermal histories and ionisation levels of the IGM, and images of a 1.5 Gpc box showing the distribution of 70 000 mock quasar spectra.

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