# How to estimate the 3D power spectrum of the Lyman-$\alpha$ forest

29 Dec 2017 Font-Ribera Andreu McDonald Patrick Slosar Anže

We derive and numerically implement an algorithm for estimating the 3D power spectrum of the Lyman-$\alpha$ (Ly-$\alpha$) forest flux fluctuations. The algorithm exploits the unique geometry of Ly-$\alpha$ forest data to efficiently measure the cross-spectrum between lines of sight as a function of parallel wavenumber, transverse separation and redshift... (read more)

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• COSMOLOGY AND NONGALACTIC ASTROPHYSICS