論文 - 高橋 龍一
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宇宙密度揺らぎの振幅問題―標準宇宙論への警告!?―
高橋 龍一
日本物理学会誌 71 ( 9 ) 598 - 606 2016年
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Detection of universality of dark matter profile from Subaru weak lensing measurements of 50 massive clusters
Hiroko Niikura, Masahiro Takada, Nobuhiro Okabe, Rossella Martino, Ryuichi Takahashi
Publications of the Astronomical Society of Japan 6 ( 67 ) 10324 2015年12月
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Constraints on warm dark matter from weak lensing in anomalous quadruple lenses
Kaiki Taro Inoue, Ryuichi Takahashi, Tomo Takahashi, Tomoaki Ishiyama
Monthly Notices of the Royal Astronomical Society 3 ( 448 ) 2704 - 2716 2015年04月
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An optimal survey geometry of weak lensing survey: minimizing supersample covariance
Ryuichi Takahashi, Shunji Soma, Masahiro Takada and Issha Kayo
Monthly Notices of the Royal Astronomical Society 4 ( 444 ) 3473 - 3487 2014年11月
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On the systematic errors of cosmological-scale gravity tests using redshift-space distortion: non-linear effects and the halo bias
Takashi Ishikawa, Tomonori Totani, Takahiro Nishimichi, Ryuichi Takahashi, Naoki Yoshida and Motonari Tonegawa
Monthly Notices of the Royal Astronomical Society 4 ( 443 ) 3359 - 3367 2014年10月
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Weak lensing by intergalactic ministructures in quadruple lens systems: simulation and detection
Ryuichi Takahashi and Kaiki Inoue
Monthly Notices of the Royal Astronomical Society 1 ( 440 ) 870 - 888 2014年05月
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Bias-hardened CMB lensing with polarization
Toshiya Namikawa, Ryuichi Takahashi
Monthly Notices of the Royal Astronomical Society 2 ( 438 ) 1507 - 1517 2014年02月
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Bias-hardened CMB lensing
Toshiya Namikawa, Duncan Hanson, Ryuichi Takahashi
Monthly Notices of the Royal Astronomical Society 1 ( 431 ) 609 - 620 2013年05月
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Observational Upper Bound on the Cosmic Abundances of Negative-mass Compact Objects and Ellis Wormholes from the Sloan Digital Sky Survey
Ryuichi Takahashi, Hideki Asada
The Astrophysical Journal 1 ( 768 ) L16 2013年05月
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Revising the Halofit Model for the Nonlinear Matter Power Spectrum
Ryuichi Takahashi, et al.
The Astrophysical Journal 2 ( 761 ) 152 2012年12月
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Weak lensing by line-of-sight haloes as the origin of flux-ratio anomalies in quadruply lensed QSOs
Kaiki Inoue and Ryuichi Takahashi
Monthly Notices of the Royal Astronomical Society 4 ( 426 ) 2978 - 2993 2012年11月
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Probability Distribution Functions of Cosmological Lensing: Convergence, Shear, and Magnification
Ryuichi Takahashi, et al.
The Astrophysical Journal 2 ( 742 ) 15 2011年11月
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Non-Gaussian Error Contribution to Likelihood Analysis of the Matter Power Spectrum
Ryuichi Takahashi, et al.
The Astrophysical Journal 1 ( 726 ) 7 2011年01月
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Simulations of Baryon Acoustic Oscillations: Likelihood Analysis of the Matter Power Spectrum
Ryuichi Takahashi, Naoki Yoshida, Masahiro Takada, Takahiko Matsubara, Naoshi Sugiyama, Issha Kayo, Takahiro Nishimichi, Shun Saito, Atsushi Taruya
Proceedings of the 19th Workshop on General Relativity and Gravitation in Japan 331 - 334 2010年02月
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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