A simple analytic treatment of linear growth of structure with baryon acoustic oscillations

Citation:

Slepian Z, Eisenstein DJ. A simple analytic treatment of linear growth of structure with baryon acoustic oscillations. Monthly Notices of the Royal Astronomical Society. 2016;457 :24-37.

Date Published:

March 1, 2016

Abstract:

In linear perturbation theory, all information about the growth ofstructure is contained in the Green's function, or equivalently,transfer function. These functions are generally computed usingnumerical codes or by phenomenological fitting formula anchored inaccurate analytic results in the limits of large and small scale. Here,we present a framework for analytically solving all scales, inparticular the intermediate scales relevant for the baryon acousticoscillations (BAO). We solve for the Green's function and transferfunction using spherically averaged overdensities and the approximationthat the density of the coupled baryon-photon fluid is constant interiorto the sound horizon.

Website