9 papers
An optimal quadratic estimator for window-free cosmic shear power spectra
Taisei Terawaki, Masahiro Takada
The pseudo- estimator recovers the true cosmic shear power spectrum by correcting for the survey window convolution while employing inverse-variance weighting based on intr…
The Environmental Dependence of Halo Intrinsic Alignments: Stronger Signals in Underdense Regions
Masaya Ichikawa, Jingjing Shi, Toshiki Kurita +3
The intrinsic alignment (IA) of galaxies and the dark matter haloes that host them is one of the leading astrophysical systematics for weak-lensing cosmology, yet how the IA signal…
Modeling survey-window and integral-constraint effects on PNG in the galaxy power spectrum with light-cone mocks
Shintaro Nakano, Masahiro Takada, Toshiki Kurita +1
We develop an analysis framework based on {\em light-cone} galaxy mock catalogs constructed from linear theory simulations in order to accurately model the impact of primordial non…
Analytical method for computing the covariance matrix of cosmic shear two-point correlation function
Kosuke Nagura, Ryo Terasawa, Taisei Terawaki +1
Accurate estimation of the covariance matrix of cosmic shear statistics is essential for cosmological analyses using current and upcoming wide-area weak lensing surveys. In this wo…
Impact of Simulation Box Size for Weak Lensing: Replication and Super-Sample Effects
Akira Tokiwa, Adrian E. Bayer, Joaquin Armijo +6
We quantify the bias caused by small simulation box size on weak lensing observables and covariances, considering both replication and super-sample effects for a range of higher-or…
Late-time suppression of structure growth as a solution for the tension
Ryo Terasawa, Masahiro Takada, Toshiki Kurita +1
The value inferred from the Subaru Hyper Suprime-Cam (HSC) Year 3 cosmic shear data, under the assumption of the flat CDM model, is 2-3 lower than that inferred from ob…
Testing small-scale modifications in the primordial power spectrum with Subaru HSC cosmic shear, primary CMB and CMB lensing
Ryo Terasawa, Masahiro Takada, Sunao Sugiyama +1
Different cosmological probes, such as primary cosmic microwave background (CMB) anisotropies, CMB lensing, and cosmic shear, are sensitive to the primordial power spectrum (PPS) o…
On the equivalence between galaxy angular correlation function and power spectrum in constraining primordial non-Gaussianity
Ryo Terasawa, Yue Nan, Masahiro Takada
We investigate the angular power spectrum ( and angular correlation function () of galaxy number density field in the presence of the local-type primordial non-Gauss…
The impact of the redshift-dependent selection effect of halos on the redshift-space power spectrum
Kanmi Nose, Masahiro Takada, Ryo Terasawa
In a wide-area spectroscopic survey of galaxies, it is nearly impossible to obtain a homogeneous sample of galaxies with respect to galaxy properties such as stellar mass and host…