Cosmological constraints from the convergence 1-point probability distribution

Author(s): Patton, Kenneth; Blazek, Jonathan; Honscheid, Klaus; Huff, Eric; Melchior, Peter M; et al

To refer to this page use: http://arks.princeton.edu/ark:/88435/pr1z02z82n
 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 Omega(m)-sigma(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. Publication Date: Nov-2017 Electronic Publication Date: 29-Jun-2017 Citation: Patton, Kenneth, Blazek, Jonathan, Honscheid, Klaus, Huff, Eric, Melchior, Peter, Ross, Ashley J, Suchyta, Eric. (2017). Cosmological constraints from the convergence 1-point probability distribution. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 472 (439 - 446. doi:10.1093/mnras/stx1626 DOI: doi:10.1093/mnras/stx1626 ISSN: 0035-8711 EISSN: 1365-2966 Related Item: https://ui.adsabs.harvard.edu/abs/2017MNRAS.472..439P/abstract Pages: 439 - 446 Type of Material: Journal Article Journal/Proceeding Title: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Version: Final published version. Article is made available in OAR by the publisher's permission or policy.