論文 - 高橋 龍一
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Simulations of Wide-Field Weak Lensing Surveys. I. Basic Statistics and Non-Gaussian Effects
Masanori Sato, Takashi Hamana, Ryuichi Takahashi, Masahiro Takada, Naoki Yoshida, Takahiko Matsubara, Naoshi Sugiyama
Astrophysical Journal 701 945 - 954 2009年08月
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Simulations of Baryon Acoustic Oscillations II: Covariance matrix of the matter power spectrum
Ryuichi Takahashi, Naoki Yoshida, Masahiro Takada, Takahiko Matsubara, Naoshi Sugiyama, Issha Kayo, Atsushi J. Nishizawa, Takahiro Nishimichi, Shun Saito, Atsushi Taruya
Astrophysical Journal 700 479 - 490 2009年07月
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Modeling Nonlinear Evolution of Baryon Acoustic Oscillations: Convergence Regime of N-body Simulations and Analytic Models
Takahiro Nishimichi, Akihito Shirata, Atsushi Taruya, Kazuhiro Yahata, Shun Saito, Yasushi Suto, Ryuichi Takahashi, Naoki Yoshida, Takahiko Matsubara, Naoshi Sugiyama, Issha Kayo, Yipeng Jing, Kohji Yoshikawa
Publications of the Astronomical Society of Japan 61 321 - 332 2009年04月
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Optimal Location of Two Laser-Interferometric Detectors for Gravitational Wave Backgrounds at 100-MHz
Atsushi Nishizawa, Seiji Kawamura, Tomotada Akutsu, Koji Arai, Kazuhiro Yamamoto, Daisuke Tatsumi, Erina Nishida, Masa-aki Sakagami, Takeshi Chiba, Ryuichi Takahashi, Naoshi Sugiyama
Classical and Quantum Gravity 25 225011-1 - 225011-14 2008年11月
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Simulations of Baryon Acoustic Oscillations I : Growth of Large-Scale Density Fluctuations
Ryuichi Takahashi, Naoki Yoshida, Takahiko Matsubara, Naoshi Sugiyama, Issha Kayo, Takahiro Nishimichi, Akihito Shirata, Atsushi Taruya, Shun Saito, Kazuhiro Yahata, Yasushi Suto
Monthly Notices of the Royal Astronomical Society 389 1675 - 1682 2008年10月
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Search for a stochastic background of 100-MHz gravitational waves with laser interferometers.
Akutsu T, Kawamura S, Nishizawa A, Arai K, Yamamoto K, Tatsumi D, Nagano S, Nishida E, Chiba T, Takahashi R, Sugiyama N, Fukushima M, Yamazaki T, Fujimoto MK
Physical review letters 101 ( 10 ) 101101 2008年09月
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Search for a stochastic background of 100-MHz gravitational waves with laser interferometers
Tomotada Akutsu, Seiji Kawamura, Atsushi Nishizawa, Koji Arai, Kazuhiro Yamamoto, Daisuke Tatsumi, Shigeo Nagano, Erina Nishida, Takeshi Chiba, Ryuichi Takahashi, Naoshi Sugiyama, Mitsuhiro Fukushima, Toshitaka Yamazaki, Masa-Katsu Fujimoto
Physical Review Letters 101 101101-1 - 101101-4 2008年09月
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Third Order Density Perturbation and One-loop Power Spectrum in a Dark Energy Dominated Universe
Ryuichi Takahashi
Progress of Theoretical Physics 120 549 - 559 2008年09月
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Cosmic Microwave Background Weak Lensing Correlation: Analytical And Numerical Study of Non-linearity and Implications for Dark Energy
Atsushi J. Nishizawa, Eiichiro Komatsu, Naoki Yoshida, Ryuichi Takahashi, Naoshi Sugiyama
Astrophysical Journal Letter 676 93 - 96 2008年04月
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Laser-interferometric Detectors for Gravitational Wave Background at 100 MHz : Detector Design and Sensitivity
Atsushi Nishizawa, Seiji Kawamura, Tomotada Akutsu, Koji Arai, Kazuhiro Yamamoto, Daisuke Tatsumi, Erina Nishida, Masa-aki Sakagami, Takeshi Chiba, Ryuichi Takahashi, Naoshi Sugiyama
Phyical Review D 77 022002-1 - 022002-9 2008年01月
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Weak Lensing of Galaxy Clusters in Modified Newtonian Dynamics
Ryuichi Takahashi, Takeshi Chiba
Astrophysical Journal 671 45 - 51 2007年12月
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A Consistency Relation in Cosmology
Takeshi Chiba, Ryuichi Takahashi
Physical Review D 75 101301-1 - 101301-5 2007年05月
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Lensing Effects on Gravitational Waves in a Clumpy Universe －Effects of Inhomogeneity on the Distance-Redshift Relation－
Chul-Moon Yoo, Ken-ichi Nakao, Hiroshi Kozaki, Ryuichi Takahashi
Astrophysical Journal 655 691 - 703 2007年02月
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Weak Lensing of Galaxy Clusters in Relativistic MOND theory
Ryuichi Takahashi, Takeshi Chiba
Proceedings of the 16th Workshop on General Relativity and Gravitation in Japan 219 - 222 2007年01月
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Amplitude and Phase Fluctuations for Gravitational Waves Propagating Through Inhomogeneous Mass Distribution in the Universe
Ryuichi Takahashi
AIP Conference Proceedings 873 120 - 124 2006年12月
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Amplitude and Phase Fluctuations for Gravitational Waves Propagating through Inhomogeneous Mass Distribution in the Universe
Ryuichi Takahashi
Astrophysical Journal 644 80 - 85 2006年06月
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Exact Wave Propagation in a Spacetime with a Cosmic String
Teruaki Suyama, Takahiro Tanaka, Ryuichi Takahashi
Physical Review D 73 024026-1 - 024026-15 2006年01月
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Classifying The Future of Universes with Dark Energy
Takeshi Chiba, Ryuichi Takahashi, Naoshi Sugiyama
Classical and Quantum Gravity 22 3745 - 3758 2005年09月
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Wave Propagation in a Weak Gravitational Field and The Validity of The Thin Lens Approximation
Teruaki Suyama, Ryuichi Takahashi, Shugo Michikoshi
Physical Review D 72 043001-1 - 043001-8 2005年08月
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Scattering of Gravitational Waves by The Weak Gravitational Fields of Lens Objects
Ryuichi Takahashi, Teruaki Suyama, Shugo Michikoshi
Astronomy and Astrophysics Letter 438 5 - 9 2005年07月