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Constraints on Neutrino Masses from Weak Lensing
Kiyotomo Ichiki, Masahiro Takada, Tomo Takahashi
The weak lensing (WL) distortions of distant galaxy images are sensitive to neutrino masses by probing the suppression effect on clustering strengths of total matter in large-scale…
The Impact of Non-Gaussian Errors on Weak Lensing Surveys
Masahiro Takada, Bhuvnesh Jain
The weak lensing power spectrum carries cosmological information via its dependence on the growth of structure and on geometric factors. Since much of the cosmological information…
Impact of massive neutrinos on nonlinear matter power spectrum
Shun Saito, Masahiro Takada, Atsushi Taruya
We present the first attempt to analytically study the nonlinear matter power spectrum for a mixed dark matter (cold dark matter plus neutrinos of total mass ~0.1eV) model based on…
Probing dark energy with cluster counts and cosmic shear power spectra: including the full covariance
Masahiro Takada, Sarah Bridle
(Abridged) Combining cosmic shear power spectra and cluster counts is powerful to improve cosmological parameter constraints and/or test inherent systematics. However they probe th…
Probing the Cluster Mass Distribution using Subaru Weak Lensing Data
Keiichi Umetsu, Masahiro Takada, Tom Broadhurst
We present results from a weak lensing analysis of the galaxy cluster A1689 (z=0.183) based on deep wide-field imaging data taken with Suprime-Cam on Subaru telescope. A maximum en…
Color Tomography
Bhuvnesh Jain, Andrew Connolly, Masahiro Takada
Lensing tomography with multi-color imaging surveys can probe dark energy and the cosmological power spectrum. However accurate photometric redshifts for tomography out to high red…
Can a galaxy redshift survey measure dark energy clustering?
Masahiro Takada
(abridged) A wide-field galaxy redshift survey allows one to probe galaxy clustering at largest spatial scales, which carries an invaluable information on horizon-scale physics com…
Cosmology with High-redshift Galaxy Survey: Neutrino Mass and Inflation
Masahiro Takada, Eiichiro Komatsu, Toshifumi Futamase
(abridged) High-z galaxy redshift surveys open up exciting possibilities for precision determinations of neutrino masses and inflationary models. The high-z surveys are more useful…
Systematic Errors in Future Weak Lensing Surveys: Requirements and Prospects for Self-Calibration
Dragan Huterer, Masahiro Takada, Gary Bernstein +1
We study the impact of systematic errors on planned weak lensing surveys and compute the requirements on their contributions so that they are not a dominant source of the cosmologi…
Can the Steep Mass Profile of A1689 Be Explained by a Triaxial Dark Halo?
Masamune Oguri, Masahiro Takada, Keiichi Umetsu +1
The steep mass profile of A1689 derived from recent detailed lensing observations is not readily reconciled with the low concentration halos predicted by the standard CDM model. Ho…
Calibrating the Nonlinear Matter Power Spectrum: Requirements for Future Weak Lensing Surveys
Dragan Huterer, Masahiro Takada
Uncertainties in predicting the nonlinear clustering of matter are among the most serious theoretical systematics facing the upcoming wide-field weak gravitational lensing surveys.…
Baryon Oscillations and Dark-Energy Constraints from Imaging Surveys
Derek Dolney, Bhuvnesh Jain, Masahiro Takada
Baryonic oscillations in the galaxy power spectrum have been studied as a way of probing dark-energy models. While most studies have focused on spectroscopic surveys at high redshi…
Effects of halo substructure on the power spectrum and bispectrum
Derek Dolney, Bhuvnesh Jain, Masahiro Takada
We study the effects of halo substructure and a distribution in the concentration parameter of haloes on large-scale structure statistics. The effects on the power spectrum and bis…
Tomography of lensing cross power spectra
Masahiro Takada, Martin White
By obtaining photometric redshift information, tomography allows us to cross-correlate galaxy ellipticities in different source redshift bins. The cross-correlation is non-vanishin…
Searching for massive clusters in weak lensing surveys
Takashi Hamana, Masahiro Takada, Naoki Yoshida
We explore the ability of weak lensing surveys to locate massive clusters. We use both analytic models of dark matter halos and mock weak lensing surveys generated from a large cos…
Cosmological parameters from lensing power spectrum and bispectrum tomography
Masahiro Takada, Bhuvnesh Jain
We examine how lensing tomography with the bispectrum and power spectrum can constrain cosmological parameters and the equation of state of dark energy. Our analysis uses the full…
Halo model prediction of the cosmic magnification statistics: the full non-linear contribution
Masahiro Takada, Takashi Hamana
The lensing magnification effect due to large-scale structure is statistically measurable by correlation of size fluctuations in distant galaxy images as well as by the QSO-galaxy…
Three-Point Correlations in Weak Lensing Surveys: Model Predictions and Applications
Masahiro Takada, Bhuvnesh Jain
We use the halo model of clustering to compute two- and three-point correlation functions for weak lensing, and apply them in a new statistical technique to measure properties of m…
The Three-Point Correlation Function for Spin-2 Fields
Masahiro Takada, Bhuvnesh Jain
The three-point correlation function (3PCF) of the spin-2 fields, the cosmic shear and cosmic microwave background polarization fields, is a statistical measure of non-Gaussian sig…
The Three-Point Correlation Function in Cosmology
Masahiro Takada, Bhuvnesh Jain
With the advent of high-quality surveys in cosmology the full three-point correlation function will be a valuable statistic for describing structure formation models. It contains i…
Probing Intracluster Magnetic Fields with Cosmic Microwave Background Polarization
Hiroshi Ohno, Masahiro Takada, Klaus Dolag +2
Intracluster magnetic fields with strength induce Faraday rotation on the cosmic microwave background (CMB) polarization. Measurements of this effect can potentially pr…
The Kurtosis of the Cosmic Shear Field
Masahiro Takada, Bhuvnesh Jain
We study the fourth-order moment of the cosmic shear field using the dark matter halo approach to describe the nonlinear gravitational evolution of structure in the universe. Since…
Lognormal Property of Weak Lensing Fields
A. Taruya, M. Takada, T. Hamana +2
The statistical property of the weak lensing fields is studied quantitatively using the ray-tracing simulations. Motivated by the empirical lognormal model that characterizes the p…
Faraday Rotation Effect of Intracluster Magnetic Field on Cosmic Microwave Background Polarization
Masahiro Takada, Hiroshi Ohno, Naoshi Sugiyama
The observed magnetic field of microgauss strength in clusters of galaxies should induce the Faraday rotation effect on the linearly polarized cosmic microwave background (CMB) rad…