106 citations · 486 across the 16 of their papers we have counts for
12 papers · 1 filter
Testing general relativity with the multipole spectra of the SDSS luminous red galaxies
Kazuhiro Yamamoto, Takahiro Sato, Gert Huetsi
As a test of general relativity on cosmological scales, we measure the γparameter for the growth rate of density perturbations using the redshift-space distortion of the luminous r…
Astrophysical Condition on the attolensing as a possible probe for a modified gravity theory
Takahiro Sato, Bobby E. Gunara, Kazuhiro Yamamoto +1
We investigate the wave effect in the gravitational lensing by a black hole with very tiny mass less than 10^-19 solar mass, which is called attolensing, motivated by a recent repo…
Searching for modified gravity with baryon oscillations: from SDSS to wide field multiobject spectroscopy (WFMOS)
Kazuhiro Yamamoto, Bruce A. Bassett, Robert C. Nichol +2
We discuss how the baryon acoustic oscillation (BAO) signatures in the galaxy power spectrum can distinguish between modified gravity and the cosmological constant as the source of…
The finite source size effect and the wave optics in gravitational lensing
Norihito Matsunaga, Kazuhiro Yamamoto
We investigate the finite source size effect in the context of the wave optics in the gravitational lensing. The magnification of an extended source is presented in an analytic man…
Non-Gaussianity in Multi-field Stochastic Inflation with the Scaling Approximation
Takeshi Hattori, Kazuhiro Yamamoto
The statistics of multi-field inflation are investigated using the stochastic approach. We analytically obtain the probability distribution function of fields with the scaling appr…
Modulation of a Chirp Gravitational Wave from a Compact Binary due to Gravitational Lensing
Kazuhiro Yamamoto
A possible wave effect in the gravitational lensing phenomenon is discussed. We consider the interference of two coherent gravitational waves of slightly different frequencies from…