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Statistical connection of peak counts to power spectrum and moments in weak lensing field
Masato Shirasaki
The number density of local maxima of weak lensing field, referred to as weak-lensing peak counts, can be used as a cosmological probe. However, its relevant cosmological informati…
The imprint of gravity on weak gravitational lensing II : Information content in cosmic shear statistics
Masato Shirasaki, Takahiro Nishimichi, Baojiu Li +1
We investigate the information content of various cosmic shear statistics on the theory of gravity. Focusing on the Hu-Sawicki-type model, we perform a set of ray-tracing si…
Robust covariance estimation of galaxy-galaxy weak lensing: validation and limitation of jackknife covariance
Masato Shirasaki, Masahiro Takada, Hironao Miyatake +4
We develop a method to simulate galaxy-galaxy weak lensing by utilizing all-sky, light-cone simulations and their inherent halo catalogs. Using the mock catalog to study the error…
Cosmological constraints on dark matter annihilation and decay: Cross-correlation analysis of the extragalactic -ray background and cosmic shear
Masato Shirasaki, Oscar Macias, Shunsaku Horiuchi +2
We derive constraints on dark matter (DM) annihilation cross section and decay lifetime from cross-correlation analyses of the data from Fermi-LAT and weak lensing surveys that cov…
The imprint of gravity on weak gravitational lensing I: Connection between observables and large scale structure
Yuichi Higuchi, Masato Shirasaki
We study the effect of gravity on the statistical properties of various large-scale structures which can be probed in weak gravitational lensing measurements. A set of ray-t…
Covariance in the Thermal SZ-Weak Lensing Mass Scaling Relation of Galaxy Clusters
Masato Shirasaki, Daisuke Nagai, Erwin T. Lau
The thermal Sunyaev-Zel'dovich (tSZ) effect signal is widely recognized as a robust mass proxy of galaxy clusters with small intrinsic scatter. However, recent observational calibr…
Cosmological Constraint on the Light Gravitino Mass from CMB Lensing and Cosmic Shear
Ken Osato, Toyokazu Sekiguchi, Masato Shirasaki +2
Light gravitinos of mass eV are of particular interest in cosmology, offering various baryogenesis scenarios without suffering from the cosmological gra…