3 papers
astro-ph1997
Cosmological redshift distortion: deceleration, bias and density parameters from future redshift surveys of galaxies
Takahiro T. Nakamura, Takahiko Matsubara, Yasushi Suto
The observed two-point correlation functions of galaxies in redshift space become anisotropic due to the geometry of the universe as well as due to the presence of the peculiar vel…
astro-ph1996
Strong Gravitational Lensing and Velocity Function as Tools to Probe Cosmological Parameters: Current Constraints and Future Predictions
Takahiro T. Nakamura, Yasushi Suto
Constraints on cosmological models from strong gravitational lensing statistics are investigated. We pay particular attention to the role of the velocity function in the calculatio…
astro-ph1996
The spectrum of cosmological perturbations produced by a multi-component inflaton to second order in the slow-roll approximation
Takahiro T. Nakamura, Ewan D. Stewart
We derive general analytic formulae for the power spectrum and spectral index of the curvature perturbation produced during inflation driven by a multi-component inflaton field, up…