Baryons and weak lensing power spectra
نویسنده
چکیده
We provide a simple toy model to elucidate the effects of baryonic cooling on predictions of the convergence power spectrum in weak gravitational lensing. Our model suggests that the effects of baryonic cooling on dark matter halo profiles can alter the dark matter power spectrum at k ∼ 10hMpc and lead to percent level changes in the convergence angular power spectrum at wavenumbers of several thousand. These effects would be measurable with planned weak lensing surveys and will impact constraints on cosmological parameters.
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