pkann - II. A non-linear matter power spectrum interpolator developed using artificial neural networks
pkann - II. A non-linear matter power spectrum interpolator developed using artificial neural networks
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DOI:
10.1093/mnras/stu090
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发表时间:
2014-04-01
影响因子:
4.8
通讯作者:
Thomas, Shaun A.
中科院分区:
文献类型:
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作者:
Agarwal, Shankar;Abdalla, Filipe B.;Thomas, Shaun A.
In this paper we introduce PkANN, a freely available software package for interpolating the non-linear matter power spectrum, constructed using artificial neural networks (ANNs). Previously, using HALOFIT to calculate matter power spectrum, we demonstrated that ANNs can make extremely quick and accurate predictions of the power spectrum. Now, using a suite of 6380 N-body simulations spanning 580 cosmologies, we train ANNs to predict the power spectrum over the cosmological parameter space spanning 3 sigma confidence level around the concordance cosmology. When presented with a set of cosmological parameters (Omega(m)h(2), Omega(b)h(2), n(s), w, sigma 8, Sigma m(v) and redshift z), the trained ANN interpolates the power spectrum for z