論文 - 高橋 龍一
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Flat to nonflat: Calculating nonlinear power spectra of biased tracers for a nonflat Λ CDM model
Ryo Terasawa, Ryuichi Takahashi, Takahiro Nishimichi, Masahiro Takada
Physical Review D ( 109 ) 063504 2024年03月
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Hyper Suprime-Cam Year 3 results: Cosmology from galaxy clustering and weak lensing with HSC and SDSS using the emulator based halo model
Hironao Miyatake, Sunao Sugiyama, Masahiro Takada, Takahiro Nishimichi, Xiangchong Li, Masato Shirasaki, Surhud More, Yosuke Kobayashi, Atsushi J. Nishizawa, Markus M. Rau, Tianqing Zhang, Ryuichi Takahashi, Roohi Dalal, Rachel Mandelbaum, Michael A. Strauss, Takashi Hamana, Masamune Oguri, Ken Osato, Wentao Luo, Arun Kannawadi, Bau-Ching Hsieh, Robert Armstrong, Yutaka Komiyama, Robert H. Lupton, Nate B. Lust, Lauren A. MacArthur, Satoshi Miyazaki, Hitoshi Murayama, Yuki Okura, Paul A. Price, Tomomi Sunayama, Philip J. Tait, Masayuki Tanaka, Shiang-Yu Wang
Physical Review D ( 108 ) 123517 2023年12月
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Hyper Suprime-Cam Year 3 results: Cosmology from cosmic shear two-point correlation functions
Xiangchong Li, Tianqing Zhang, Sunao Sugiyama, Roohi Dalal, Ryo Terasawa, Markus M. Rau, Rachel Mandelbaum, Masahiro Takada, Surhud More, Michael A. Strauss, Hironao Miyatake, Masato Shirasaki, Takashi Hamana, Masamune Oguri, Wentao Luo, Atsushi J. Nishizawa, Ryuichi Takahashi, Andrina Nicola, Ken Osato, Arun Kannawadi, Tomomi Sunayama, Robert Armstrong, James Bosch, Yutaka Komiyama, Robert H. Lupton, Nate B. Lust, Lauren A. MacArthur, Satoshi Miyazaki, Hitoshi Murayama, Takahiro Nishimichi, Yuki Okura, Paul A. Price, Philip J. Tait, Masayuki Tanaka, Shiang-Yu Wang
Physical Review D ( 108 ) 123518 2023年12月
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Hyper Suprime-Cam Year 3 results: Cosmology from cosmic shear power spectra
Roohi Dalal, Xiangchong Li, Andrina Nicola, Joe Zuntz, Michael A. Strauss, Sunao Sugiyama, Tianqing Zhang, Markus M. Rau, Rachel Mandelbaum, Masahiro Takada, Surhud More, Hironao Miyatake, Arun Kannawadi, Masato Shirasaki, Takanori Taniguchi, Ryuichi Takahashi, Ken Osato, Takashi Hamana, Masamune Oguri, Atsushi J. Nishizawa, Andrés A. Plazas Malagón, Tomomi Sunayama, David Alonso, Anže Slosar, Robert Armstrong, James Bosch, Yutaka Komiyama, Robert H. Lupton, Nate B. Lust, Lauren A. MacArthur, Satoshi Miyazaki, Hitoshi Murayama, Takahiro Nishimichi, Yuki Okura, Paul A. Price, Philip J. Tait, Masayuki Tanaka, Shiang-Yu Wang
Physical Review D ( 108 ) 123519 2023年12月
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Hyper Suprime-Cam Year 3 results: Measurements of clustering of SDSS-BOSS galaxies, galaxy-galaxy lensing, and cosmic shear
Surhud More, Sunao Sugiyama, Hironao Miyatake, Markus Michael Rau, Masato Shirasaki, Xiangchong Li, Atsushi J. Nishizawa, Ken Osato, Tianqing Zhang, Masahiro Takada, Takashi Hamana, Ryuichi Takahashi, Roohi Dalal, Rachel Mandelbaum, Michael A. Strauss, Yosuke Kobayashi, Takahiro Nishimichi, Masamune Oguri, Wentao Luo, Arun Kannawadi, Bau-Ching Hsieh, Robert Armstrong, James Bosch, Yutaka Komiyama, Robert H. Lupton, Nate B. Lust, Lauren A. MacArthur, Satoshi Miyazaki, Hitoshi Murayama, Yuki Okura, Paul A. Price, Philip J. Tait, Masayuki Tanaka, Shiang-Yu Wang
Physical Review D ( 108 ) 123520 2023年12月
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Hyper Suprime-Cam Year 3 results: Cosmology from galaxy clustering and weak lensing with HSC and SDSS using the minimal bias model
Sunao Sugiyama, Hironao Miyatake, Surhud More, Xiangchong Li, Masato Shirasaki, Masahiro Takada, Yosuke Kobayashi, Ryuichi Takahashi, Takahiro Nishimichi, Atsushi J. Nishizawa, Markus M. Rau, Tianqing Zhang, Roohi Dalal, Rachel Mandelbaum, Michael A. Strauss, Takashi Hamana, Masamune Oguri, Ken Osato, Arun Kannawadi, Robert Armstrong, Yutaka Komiyama, Robert H. Lupton, Nate B. Lust, Satoshi Miyazaki, Hitoshi Murayama, Yuki Okura, Paul A. Price, Philip J. Tait, Masayuki Tanaka, Shiang-Yu Wang
Physical Review D ( 108 ) 123521 2023年12月
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Probing the Solar Interior with Lensed Gravitational Waves from Known Pulsars
Ryuichi Takahashi, Soichiro Morisaki, Teruaki Suyama
The Astrophysical Journal ( 957 ) 52 2023年11月
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On weak lensing response functions
D. Munshi, R. Takahashi, J. D. McEwen
Journal of Cosmology and Astroparticle Physics ( 010 ) 1 - 21 2022年10月
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Cosmological inference from an emulator based halo model. II. Joint analysis of galaxy-galaxy weak lensing and galaxy clustering from HSC-Y1 and SDSS
Hironao Miyatake, Sunao Sugiyama, Masahiro Takada, Takahiro Nishimichi, Masato Shirasaki, Yosuke Kobayashi, Rachel Mandelbaum, Surhud More, Masamune Oguri, Ken Osato, Youngsoo Park, Ryuichi Takahashi, Jean Coupon, Chiaki Hikage, Bau-Ching Hsieh, Alexie Leauthaud, Xiangchong Li, Wentao Luo, Robert H. Lupton, Satoshi Miyazaki, Hitoshi Murayama, Atsushi J. Nishizawa, Paul A. Price, Melanie Simet, Joshua S. Speagle, Michael A. Strauss, Masayuki Tanaka, Naoki Yoshida
Physical Review D ( 106 ) 083520-1 - 083520-39 2022年10月
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Cosmological inference from an emulator based halo model. I. Validation tests with HSC and SDSS mock catalogs
Hironao Miyatake, Yosuke Kobayashi, Masahiro Takada, Takahiro Nishimichi, Masato Shirasaki, Sunao Sugiyama, Ryuichi Takahashi, Ken Osato, Surhud More, Youngsoo Park
Physical Review D ( 106 ) 083519-1 - 083519-36 2022年10月
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Separate universe approach to evaluate nonlinear matter power spectrum for nonflat ΛCDM model
Ryo Terasawa, Ryuichi Takahashi, Takahiro Nishimichi, Masahiro Takada
Physical Review D ( 106 ) 083504-1 - 083504-18 2022年10月
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Amplitude and phase fluctuations of gravitational waves magnified by strong gravitational lensing
Masamune Oguri, Ryuichi Takahashi
Physical Review D ( 106 ) 043532-1 - 043532-9 2022年08月
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HSC Year 1 cosmology results with the minimal bias method: HSC×BOSS galaxy-galaxy weak lensing and BOSS galaxy clustering
Sunao Sugiyama, Masahiro Takada, Hironao Miyatake, Takahiro Nishimichi, Masato Shirasaki, Yosuke Kobayashi, Rachel Mandelbaum, Surhud More, Ryuichi Takahashi, Ken Osato, Masamune Oguri, Jean Coupon, Chiaki Hikage, Bau-Ching Hsieh, Yutaka Komiyama, Alexie Leauthaud, Xiangchong Li, Wentao Luo, Robert H. Lupton, Hitoshi Murayama, Atsushi J. Nishizawa, Youngsoo Park, Paul A. Price, Melanie Simet, Joshua S. Speagle, Michael A. Strauss, Masayuki Tanaka
Physical Review D ( 105 ) 123537-1 - 123537-23 2022年06月
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A new estimator for phase statistics
D. Munshi, R. Takahashi, J. D. McEwen, T. D. Kitching, F. R. Bouchet
Journal of Cosmology and Astroparticle Physics ( 005 ) 1 - 16 2022年05月
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Probing cosmology and gastrophysics with fast radio bursts: Cross-correlations of dark matter haloes and cosmic dispersion measures
Masato Shirasaki, Ryuichi Takahashi, Ken Osato, Kunihito Ioka
2022年02月
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Cosmological boost factor for dark matter annihilation at redshifts of z=10−100 using the power spectrum approach
Ryuichi Takahashi, Kazunori Kohri
2021年11月
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Impacts of new small-scale N -body simulations on dark matter annihilations constrained from cosmological 21-cm line observations
Nagisa Hiroshima, Kazunori Kohri, Toyokazu Sekiguchi, Ryuichi Takahashi
2021年10月
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Statistical modelling of the cosmological dispersion measure
Ryuichi Takahashi,Kunihito Ioka, Asuka Mori, Koki Funahashi
502 ( 2 ) 2615 - 2629 2021年04月
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Power spectrum of halo intrinsic alignments in simulations
Toshiki Kurita, Masahiro Takada, Takahiro Nishimichi, Ryuichi Takahashi, Ken Osato, Yosuke Kobayashi
Monthly Notices of the Royal Astronomical Society ( 501 ) 833 2021年02月
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Constraining primordial non-Gaussianity with postreconstructed galaxy bispectrum in redshift space
Masato Shirasaki, Naonori S. Sugiyama, Ryuichi Takahashi, Francisco-Shu Kitaura
Physical Review D ( 103 ) 023506 2021年01月
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Covariance of the redshift-space matter power spectrum after reconstruction
Chiaki Hikage, Ryuichi Takahashi, Kazuya Koyama
Physical Review D ( 102 ) 083514 2020年09月
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Accurate emulator for the redshift-space power spectrum of dark matter halos and its application to galaxy power spectrum
Yosuke Kobayashi, Takahiro Nishimichi, Masahiro Takada, Ryuichi Takahashi, Ken Osato
Physical Review D ( 102 ) 063504 2020年09月
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Probing Dark Low-mass Halos and Primordial Black Holes with Frequency-dependent Gravitational Lensing Dispersions of Gravitational Waves
Masamune Oguri, Ryuichi Takahashi
The Astrophysical Journal ( 901 ) 58 2020年09月
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Fitting the Nonlinear Matter Bispectrum by the Halofit Approach
Ryuichi Takahashi, Takahiro Nishimichi, Toshiya Namikawa, Atsushi Taruya, Issha Kayo, Ken Osato, Yosuke Kobayashi, Masato Shirasaki
The Astrophysical Journal ( 895 ) 113 2020年06月
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The weak lensing bispectrum induced by gravity
D. Munshi, T. Namikawa, T. D. Kitching, J. D. McEwen, R. Takahashi, F. R. Bouchet, A. Taruya, B. Bose
Monthly Notices of the Royal Astronomical Society ( 493 ) 3985 2020年04月
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Cross-correlation of the thermal Sunyaev-Zel'dovich effect and weak gravitational lensing: Planck and Subaru Hyper Suprime-Cam first-year data
Ken Osato, Masato Shirasaki, Hironao Miyatake, Daisuke Nagai, Naoki Yoshida, Masamune Oguri, Ryuichi Takahashi
Monthly Notices of the Royal Astronomical Society 492 ( 4 ) 4780 - 4804 2020年03月
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Perturbation theory for the redshift-space matter power spectra after reconstruction
Chiaki Hikage, Kazuya Koyama, Ryuichi Takahashi
Physical Review D 101 ( 4 ) 043510 2020年02月
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Cosmological information content in redshift-space power spectrum of SDSS-like galaxies in the quasinonlinear regime up to k =0.3 h Mpc-1
Yosuke Kobayashi, Takahiro Nishimichi, Masahiro Takada, Ryuichi Takahashi
Physical Review D 101 ( 2 ) 023510 2020年01月
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Dark Quest. I. Fast and Accurate Emulation of Halo Clustering Statistics and Its Application to Galaxy Clustering
Takahiro Nishimichi, Masahiro Takada, Ryuichi Takahashi, Ken Osato, Masato Shirasaki, Taira Oogi, Hironao Miyatake, Masamune Oguri, Ryoma Murata, Yosuke Kobayashi, Naoki Yoshida
The Astrophysical Journal 884 ( 1 ) 2019年10月
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Mock galaxy shape catalogues in the Subaru Hyper Suprime-Cam Survey
Masato Shirasaki, Takashi Hamana, Masahiro Takada, Ryuichi Takahashi, Hironao Miyatake
Monthly Notices of the Royal Astronomical Society 486 ( 1 ) 52 - 69 2019年06月
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CMB lensing bispectrum: Assessing analytical predictions against full-sky lensing simulations
Toshiya Namikawa, Benjamin Bose, Francois R. Bouchet, Ryuichi Takahashi, Atsushi Taruya
Physical Review D 99 ( 6 ) 063511 2019年03月
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Covariances for cosmic shear and galaxy-galaxy lensing in the response approach
Ryuichi Takahashi, Takahiro Nishimichi, Masahiro Takada, Masato Shirasaki, Kosei Shiroyama
Monthly Notices of the Royal Astronomical Society 482 ( 3 ) 4253 - 4277 2019年01月
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Impact of nonlinear growth of the large-scale structure on CMB B-mode delensing
Toshiya Namikawa, Ryuichi Takahashi
Physical Review D 99 ( 2 ) 023530 2019年01月
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Constraints on the Mass–Richness Relation from the Abundance and Weak Lensing of SDSS Clusters
R. Murata, T. Nishimichi, M. Takada, H. Miyatake, M. Shirasaki, S. More, R. Takahashi, K. Osato
The Astrophysical Journal 2018年02月
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The first-year shear catalog of the Subaru Hyper Suprime-Cam Subaru Strategic Program Survey
R. Mandelbaum, H. Miyatake, T. Hamana, M. Oguri, M. Simet, R. Armstrong, J. Bosch, R. Murata, F. Lanusse, A. Leauthaud, J. Coupon, S. More, M. Takada, S. Miyazaki, J.S. Speagle, M. Shirasaki, C. Sifon, S. Huang, A.J. Nishizawa, E. Medezinski, Y. Okura, N. Okabe, N. Czakon, R. Takahashi, W. Coulton, C. Hikage, Y. Komiyama, R.H. Lupton, M.A. Strauss, M. Tanaka, Y. Utsumi
Publications of the Astronomical Society of Japan 2018年01月
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Full-sky Gravitational Lensing Simulation for Large-area Galaxy Surveys and Cosmic Microwave Background Experiments
R. Takahashi, T. Hamana, M. Shirasaki, T. Namikawa, T. Nishimichi, K. Osato, K. Shiroyama
The Astrophysical Journal 2017年11月
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Robust covariance estimation of galaxy-galaxy weak lensing: validation and limitation of jackknife covariance
M. Shirasaki, M. Takada, H. Miyatake, R. Takahashi, T. Hamana, T. Nishimichi, R. Murata
Monthly Notices of the Royal Astronomical Society 2017年09月
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Arrival Time Differences between Gravitational Waves and Electromagnetic Signals due to Gravitational Lensing
Ryuichi Takahashi
The Astrophysical Journal 2017年01月
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The Subaru FMOS galaxy redshift survey (FastSound). IV. New constraint on gravity theory from redshift space distortions at z~1.4
T. Okumura, C. Hikage, T. Totani, M. Tonegawa, H. Okada, K. Glazebrook, C. Blake, P.G. Ferreira, S. More, A. Taruya, S. Tsujikawa, M. Akiyama, G. Dalton, T. Goto, T. Ishikawa, F. Iwamuro, T. Matsubara, T. Nishimichi, K. Ohta, I. Shimizu, R. Takahashi, N. Takato, N. Tamura, K. Yabe, N. Yoshida
Publications of the Astronomical Society of Japan 2016年06月
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Constraints on small-scale cosmological fluctuations from SNe lensing dispersion
Ido Ben-Dayan, Ryuichi Takahashi
Monthly Notices of the Royal Astronomical Society 1 ( 455 ) 552 - 562 2016年01月
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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
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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