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Redshift Space Distortions of the Correlation Function in Wide Angle Galaxy Surveys
Alexander S. Szalay, Takahiko Matsubara, Stephen D. Landy
Using a novel two-dimensional coordinate system, we have derived a particularly simple way to express the redshift distortions in galaxy redshift surveys with arbitrary geometry in…
Light-cone effect on higher-order clustering in redshift surveys
Takahiko Matsubara, Yasushi Suto, Istvan Szapudi
We have evaluated a systematic effect on counts-in-cells analysis of deep, wide-field galaxy catalogues induced by the evolution of clustering within the survey volume. A multiplic…
Beyond Zel'dovich-Type Approximations in Gravitational Instability Theory --- Padé Prescription in Spheroidal Collapse ---
Takahiko Matsubara, Ayako Yoshisato, Masahiro Morikawa
Among several analytic approximations for the growth of density fluctuations in the expanding Universe, Zel'dovich approximation in Lagrangian coordinate scheme is known to be unus…
Accuracy of Nonlinear Approximations in Spheroidal Collapse --- Why are Zel'dovich-type approximations so good? ---
Ayako Yoshisato, Takahiko Matsubara, Masahiro Morikawa
Among various analytic approximations for the growth of density fluctuations in the expanding Universe, Zel'dovich approximation and its extensions in Lagrangian scheme are known t…
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…