Publications (55)
Discovery of Four Gravitationally Lensed Quasars from the Sloan Digital Sky Survey
Masamune Oguri, Naohisa Inada, Alejandro Clocchiatti +7
We present the discovery of four gravitationally lensed quasars selected from the spectroscopic quasar catalog of the Sloan Digital Sky Survey. We describe imaging and spectroscopi…
The Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on Dark Energy from the Third Data Release Quasar Lens Catalog
Masamune Oguri, Naohisa Inada, Michael A. Strauss +31
We present cosmological results from the statistics of lensed quasars in the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. By taking proper account of the selection function,…
Bispectrum and Nonlinear Biasing of Galaxies: Perturbation Analysis, Numerical Simulation and SDSS Galaxy Clustering
Takahiro Nishimichi, Issha Kayo, Chiaki Hikage +5
We consider nonlinear biasing models of galaxies with particular attention to a correlation between linear and quadratic biasing coefficients, b_1 and b_2. We first derive perturba…
SDSS J133401.39+331534.3: A New Subarcsecond Gravitationally Lensed Quasar
Cristian E. Rusu, Masamune Oguri, Naohisa Inada +12
The quasar SDSS J133401.39+331534.3 at z = 2.426 is found to be a two-image gravitationally lensed quasar with the image separation of 0.833. The object is first identified as a le…
Non-Gaussian Error Contribution to Likelihood Analysis of the Matter Power Spectrum
Ryuichi Takahashi, Naoki Yoshida, Masahiro Takada +6
We study the sample variance of the matter power spectrum for the standard Lambda Cold Dark Matter universe. We use a total of 5000 cosmological N-body simulations to study in deta…
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…