Measurement of the small-scale 3D Lyman-α forest power spectrum
Marie Lynn Abdul Karim,
Eric Armengaud,
Guillaume Mention
et al.
Abstract:Small-scale correlations measured in the Lyman-α (Lyα) forest encode information about the intergalactic medium and the primordial matter power spectrum. In this article, we present and implement a simple method to measure the 3-dimensional power spectrum, P
3D, of the Lyα forest at wavenumbers k corresponding to small, ∼ Mpc scales. In order to estimate P
3D from sparsely and unevenly distributed data samples, we rely on averaging 1-dimensional Fourier Transforms, as previo… Show more
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