195 citations · 397 across the 4 of their papers we have counts for
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Limits on Isocurvature Perturbations from Non-Gaussianity in WMAP Temperature Anisotropies
Chiaki Hikage, Kazuya Koyama, Takahiko Matsubara +2
We study the effect of primordial isocurvature perturbations on non-Gaussian properties of CMB temperature anisotropies. We consider generic forms of the non-linearity of isocurvat…
Limits on Primordial Non-Gaussianity from Minkowski Functionals of the WMAP Temperature Anisotropies
Chiaki Hikage, Takahiko Matsubara, Peter Coles +3
We present an analysis of the Minkowski Functionals (MFs) describing the WMAP three-year temperature maps to place limits on possible levels of primordial non-Gaussianity. In parti…
Large-Scale Anisotropic Correlation Function of SDSS Luminous Red Galaxies
Teppei Okumura, Takahiko Matsubara, Daniel J. Eisenstein +4
We study the large-scale anisotropic two-point correlation function using 46,760 luminous red galaxies at redshifts 0.16 -- 0.47 from the Sloan Digital Sky Survey. We measure the c…
Galaxy clustering constraints on deviations from Newtonian gravity at cosmological scales II: Perturbative and numerical analyses of power spectrum and bispectrum
Akihito Shirata, Yasushi Suto, Chiaki Hikage +2
We explore observational constraints on possible deviations from Newtonian gravity by means of large-scale clustering of galaxies. We measure the power spectrum and the bispectrum…
Galaxy clustering constraints on deviations from Newtonian gravity at cosmological scales
Akihito Shirata, Tetsuya Shiromizu, Naoki Yoshida +1
In spite of the growing observational evidence for dark matter and dark energy in the universe, their physical nature is largely unknown. In fact, several authors have proposed mod…
The Distribution Function of the Phase Sum as a Signature of Phase Correlations Induced by Nonlinear Gravitational Clustering
Chiaki Hikage, Takahiko Matsubara, Yasushi Suto
We explore a signature of phase correlations in Fourier modes of dark matter density fields induced by nonlinear gravitational clustering. We compute the distribution function of t…