Cosmological constraints using Minkowski functionals from the first year data of the Hyper Suprime-Cam
Monthly Notices of the Royal Astronomical Society, vol. 537, pp. 3553–3560
Abstract
ABSTRACT We use Minkowski functionals to analyse weak lensing convergence maps from the first-year data release of the Subaru Hyper Suprime-Cam (HSC-Y1) survey. Minkowski functionals provide a description of the morphological properties of a field, capturing the non-Gaussian features of the Universe matter-density distribution. Using simulated catalogues that reproduce survey conditions and encode cosmological information, we emulate Minkowski functionals predictions across a range of cosmological parameters to derive the best-fit from the data. By applying multiple scales cuts, we rigorously mitigate systematic effects, including baryonic feedback and intrinsic alignments. From the analysis, combining constraints of the angular power spectrum and Minkowski functionals, we obtain $S_8 \equiv \sigma _8\sqrt{\Omega _{{\rm m}}/0.3} = {0.808}_{-0.046}^{+0.033}$ and $\Omega _{\rm m} = {0.293}_{-0.043}^{+0.157}$. These results represent a 40 per cent improvement on the $S_8$ constraints compared to using power spectrum only. Minkowski functionals results are consistent with other two-point, and higher order statistics constraints using the same data, being in agreement with CMB results from the Planck $S_8$ measurements. Our study demonstrates the power of Minkowski functionals beyond two-point statistics to constrain and break the degeneracy between $\Omega _{\rm m}$ and $\sigma _8$.
Authors 6
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Joaquín Armijo corresponding
Kavli Institute for the Physics and Mathematics of the Universe · The University of Tokyo
Affiliation as printed
Center for Data-Driven Discovery, Kavli IPMU (WPI), UTIAS, The University of Tokyo , Kashiwa, Chiba 277-8583 ,
Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo , Chiba 277-8583 ,
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Fermi National Accelerator Laboratory · University of Chicago
Affiliation as printed
Fermi National Accelerator Laboratory , Batavia, IL 60510 ,
Kavli Institute for Cosmological Physics, University of Chicago , Chicago, IL 60637 ,
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Kavli Institute for the Physics and Mathematics of the Universe · The University of Tokyo · Instituto Nacional de Pesquisas Espaciais
Affiliation as printed
Center for Data-Driven Discovery, Kavli IPMU (WPI), UTIAS, The University of Tokyo , Kashiwa, Chiba 277-8583 ,
Instituto Nacional de Pesquisas Espaciais , Av. dos Astronautas, 1758. 12227-010, SP ,
Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo , Chiba 277-8583 ,
Instituto Nacional de Pesquisas Espaciais , Av. dos Astronautas 1758, Jardim da Granja, São José dos Campos, SP ,
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Kavli Institute for the Physics and Mathematics of the Universe · The University of Tokyo
Affiliation as printed
Center for Data-Driven Discovery, Kavli IPMU (WPI), UTIAS, The University of Tokyo , Kashiwa, Chiba 277-8583 ,
Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo , Chiba 277-8583 ,
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Affiliation as printed
Mathematical Institute, Leiden University, Snellius Gebouw , Niels Bohrweg 1, NL-2333 CA Leiden ,
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National Institutes of Natural Sciences · The Institute of Statistical Mathematics · National Astronomical Observatory of Japan
Affiliation as printed
National Astronomical Observatory of Japan, National Institutes of Natural Science , Mitaka, Tokyo 181-8588 ,
The Institute of Statistical Mathematics , Tachikawa, Tokyo 190-8562 ,
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