## Abstract

We examine the cosmological information available from the 1-point probability density function (PDF) of the weak-lensing convergence field, utilizing fast L-PICOLA simulations and a Fisher analysis. We find competitive constraints in the Ω_{m}-σ_{8} plane from the convergence PDF with 188 arcmin^{2} pixels compared to the cosmic shear power spectrum with an equivalent number of modes (ℓ < 886). The convergence PDF also partially breaks the degeneracy cosmic shear exhibits in that parameter space. A joint analysis of the convergence PDF and shear 2-point function also reduces the impact of shape measurement systematics, to which the PDF is less susceptible, and improves the total figure of merit by a factor of 2-3, depending on the level of systematics. Finally, we present a correction factor necessary for calculating the unbiased Fisher information from finite differences using a limited number of cosmological simulations.

Original language | English (US) |
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Pages (from-to) | 439-446 |

Number of pages | 8 |

Journal | Monthly Notices of the Royal Astronomical Society |

Volume | 472 |

Issue number | 1 |

DOIs | |

State | Published - Nov 2017 |

## All Science Journal Classification (ASJC) codes

- Astronomy and Astrophysics
- Space and Planetary Science

## Keywords

- Cosmological parameters
- Cosmology: observations
- Gravitational lensing: weak
- Large-scale structure of Universe