Kazuya Koyama

2012

Haloes and voids in f(R) gravity

Li, B., Zhao, G. & Koyama, K., 2012, In: Monthly Notices of the Royal Astronomical Society. 421, 4, p. 3481-3487 7 p.

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Interacting dark energy: constraints and degeneracies

Clemson, T., Koyama, K., Zhao, G., Maartens, R. & Valiviita, J., 2012, In: Physical Review D. 85, 4, p. 043007 1 p.

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New symmetries in Fierz-Pauli massive gravity

Tasinato, G., Koyama, K. & Niz, G., Jul 2012, In: Journal of High Energy Physics. 7, p. 62 62.

Research output: Contribution to journal › Article › peer-review

Non-Gaussianities in multifield DBI inflation with a waterfall phase transition

Kidani, T., Koyama, K. & Mizuno, S., 1 Oct 2012, In: Physical Review D. 86, 8, p. 083503 1-14

Research output: Contribution to journal › Article › peer-review

Redshift-space distortions in f(R) gravity

Jennings, E., Baugh, C. M., Li, B., Zhao, G-B. & Koyama, K., 21 Sept 2012, In: Monthly Notices of the Royal Astronomical Society. 425, 3, p. 2128-2143

Research output: Contribution to journal › Article › peer-review

Testing Einstein gravity with cosmic growth and expansion

Zhao, G-B., Li, H., Linder, E. V., Koyama, K., Bacon, D. J. & Zhang, X., 29 Jun 2012, In: Physical Review D. 85

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Trispectrum estimation in various models of equilateral type non-Gaussianity

Izumi, K., Mizuno, S. & Koyama, K., 2012, In: Physical Review D. 85, 2, p. 023521 1 p.

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Weak lensing predictions for coupled dark energy cosmologies at non-linear scales

Beynon, E., Baldi, M., Bacon, D. J., Koyama, K. & Sabiu, C., 1 Jun 2012, In: Monthly Notices of the Royal Astronomical Society. 422, 4, p. 3546-3553

Research output: Contribution to journal › Article › peer-review

2011

Analytic solutions in nonlinear massive gravity

Koyama, K., Niz, G. & Tasinato, G., 23 Sept 2011, In: Physical Review Letters. 107, 13, p. 131101 1 p.

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Can the gravitation have a mass?

Koyama, K., Niz, G. & Tasinato, G., Dec 2011, In: International Journal of Modern Physics A. 20, 14, p. 2803-2807

Research output: Contribution to journal › Article › peer-review

Complementarity of weak lensing and peculiar velocity measurements in testing general relativity

Song, Y., Zhao, G., Bacon, D., Koyama, K., Nichol, B. & Pogosian, L., 15 Oct 2011, In: Physical Review D. 84, 8, p. 083523 1 p.

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N-body simulations for ƒ (R) gravity using a self-adaptive particle-mesh code

Zhao, G-B., Li, B. & Koyama, K., 2 Feb 2011, In: Physical Review D. 83, 4, p. 044007 1 p.

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Primordial fluctuations and non-Gaussianities from multifield DBI Galileon inflation

Renaux-Petel, S., Mizuno, S. & Koyama, K., 2011, In: Journal of Cosmology and Astroparticle Physics. 2011, 11, p. 042 1 p.

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Strong interactions and exact solutions in nonlinear massive gravity

Koyama, K., Niz, G. & Tasinato, G., 2011, In: Physical Review D. 84, 6, p. 064033 1 p.

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Testing gravity using the environmental dependence of dark matter halos

Zhao, G-B., Li, B. & Koyama, K., 10 Aug 2011, In: Physical Review Letters. 107, 7, 1 p., 171303.

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The self-accelerating universe with vectors in massive gravity

Koyama, K., Niz, G. & Tasinato, G., Dec 2011, In: Journal of High Energy Physics. 2011, 12, 65.

Research output: Contribution to journal › Article › peer-review

2010

Brane-world gravity

Maartens, R. & Koyama, K., 2010, In: Living Reviews in Relativity. 13

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Brane-world gravity

Maartens, R. & Koyama, K., 1 Jan 2010, In: Living Reviews in Relativity. 13, 5.

Research output: Contribution to journal › Review article › peer-review

Cosmological matching conditions for gravitational waves at second order

Arroja, F., Assadullahi, H., Koyama, K. & Wands, D., 22 Dec 2010, In: Physical Review D. 80, 12, p. 123526 1 p.

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How to optimally parametrize deviations from general relativity in the evolution of cosmological perturbations

Pogosian, L., Silvestri, A., Koyama, K. & Zhao, G-B., 11 May 2010, In: Physical Review D. 81, 10, p. 104023 1 p.

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Non-Gaussianity of quantum fields during inflation

Koyama, K., 21 Jun 2010, In: Classical and Quantum Gravity. 27, 12, p. 17 pages 17 p.

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Pathological behaviour of the scalar graviton in Hořava-Lifshitz gravity

Koyama, K. & Arroja, F., 2010, In: Journal of High Energy Physics. 2010, 3, p. 7 pages 7 p.

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Primordial non-Gaussianity from the DBI Galileons

Mizuno, S. & Koyama, K., 12 Nov 2010, In: Physical Review D. 82, 10, p. 103518 1 p.

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Probing modifications of general relativity using current cosmological observations

Zhao, G., Giannantonio, T., Pogosian, L., Silvestri, A., Bacon, D., Koyama, K., Nichol, B. & Song, Y., 7 May 2010, In: Physical Review D. 81, 10, p. 103510 1 p.

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Scale dependence of halo bispectrum from non-Gaussian initial conditions in cosmological N-body simulations

Nishimichi, T., Taruya, A., Koyama, K. & Sabiu, C., 2010, In: Journal of Cosmology and Astroparticle Physics. 2010, 7, p. 1-27 27 p.

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Theoretical priors on modified growth parametrisations

Song, Y., Hollenstein, L., Calderacabral, G. & Koyama, K., Apr 2010, In: Journal of Cosmology and Astroparticle Physics. 2010, 4

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Towards multi-field D-brane inflation in a warped throat

Chen, H., Gong, J., Koyama, K. & Tasinato, G., 25 Nov 2010, In: Journal of Cosmology and Astroparticle Physics. 2010, 11

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Trispectrum estimator in equilateral type non-Gaussian models

Mizuno, S. & Koyama, K., 6 Oct 2010, In: Journal of Cosmology and Astroparticle Physics. 2010, 10

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Weak lensing predictions for modified gravities at non-linear scales

Beynon, E., Bacon, D. & Koyama, K., 17 Feb 2010, In: Monthly Notices of the Royal Astronomical Society. 403, 1, p. 353-362 10 p.

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2009

Consistency test of general relativity from large scale structure of the universe

Song, Y. & Koyama, K., 2009, In: Journal of Cosmology and Astroparticle Physics. 2009, 1, p. 1-8 8 p.

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Full quantum trispectrum in multifield DBI inflation

Mizuno, S., Arroja, F. & Koyama, K., 15 Oct 2009, In: Physical Review D. 80, 8, p. 083517 1 p.

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Full trispectrum in single field DBI inflation

Arroja, F., Mizuno, S., Koyama, K. & Tanaka, T., 25 Aug 2009, In: Physical Review D. 80, 4, p. 043527 1 p.

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Ghosts in asymmetric brane gravity and the decoupled stealth limit

Koyama, K., Padilla, A. & Silva, F., 3 Mar 2009, In: Journal of High Energy Physics. 2009, 3, p. 21 pages 21 p.

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Limits on isocurvature perturbations from non-Gaussianity in WMAP temperature anisotropy

Hikage, C., Koyama, K., Matsubara, T., Takahashi, T. & Yamaguchi, M., 21 Aug 2009, In: Monthly Notices of the Royal Astronomical Society. 398, 4, p. 2188-2198 11 p.

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Lorentz boost and non-Gaussianity in multifield DBI inflation

Mizuno, S., Arroja, F., Koyama, K. & Tanaka, T., 29 Jul 2009, In: Physical Review D. 80, 2, p. 023530 1 p.

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Non-linear evolution of matter power spectrum in modified theory of gravity

Koyama, K., Taruya, A. & Hiramatsu, T., Jun 2009, In: Physical Review D. 79, 12, p. 123512 1 p.

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Self-accelerating universe in Galileon cosmology

Silva, F. & Koyama, K., 21 Dec 2009, In: Physical Review D. 80, 12, p. 121301 1 p.

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Velocities as a probe of dark sector interactions

Koyama, K., Maartens, R. & Song, Y., 2009, In: Journal of Cosmology and Astroparticle Physics. 2009, 10, p. 1-7 7 p.

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2008

Brane-world inflation: slow-roll corrections to the spectral index

Koyama, K., Mennim, A. & Wands, D., 11 Jan 2008, In: Physical Review D. 77, 2, p. 021501 1 p.

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Cosmological perturbations in the DGP braneworld: numeric solution

Cardoso, A., Koyama, K., Seahra, S. & Silva, F., 2008, In: Physical Review D. 77, 8, p. 083512 1 p.

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Detectability of a phantom-like braneworld model with the integrated Sachs-Wolfe effect

Giannantonio, T., Song, Y. & Koyama, K., Aug 2008, In: Physical Review D. 78, 4, p. 044017 1 p.

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Induced gravity on intersecting brane worlds: maximally symmetric solutions

Corradini, O., Koyama, K. & Tasinato, G., 7 Apr 2008, In: Physical Review D. 77, 8, p. 084006

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Induced gravity on intersecting brane worlds. II, Cosmology

Corradini, O., Koyama, K. & Tasinato, G., Dec 2008, In: Physical Review D. 78, 12, p. 124002

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Non-gaussianity from the bispectrum in general multiple field inflation

Arroja, F., Mizuno, S. & Koyama, K., Aug 2008, In: Journal of Cosmology and Astroparticle Physics. 2008, 8, p. 1-15 15 p.

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Non-Gaussianity from the trispectrum in general single field inflation

Arroja, F. & Koyama, K., 28 Apr 2008, In: Physical Review D. 77, 8, p. 083517 1 p.

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Signature of primordial non-Gaussianity on the matter power spectrum

Taruya, A., Koyama, K. & Matsubara, T., 29 Dec 2008, In: Physical Review D. 78, 12, p. 123534 1 p.

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Spherical collapse in modified gravity with the Birkhoff theorem

Schafer, B. & Koyama, K., Mar 2008, In: Monthly Notices of the Royal Astronomical Society. 385, 1, p. 411-422 12 p.

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The cosmological constant and dark energy in braneworlds

Koyama, K., Feb 2008, In: General Relativity and Gravitation. 40, 2-3, p. 421-450 30 p.

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2007

Bubbles in the self-accelerating universe

Izumi, K., Koyama, K., Pujolas, O. & Tanaka, T., 27 Nov 2007, In: Physical Review D. 76, 10, p. 104041

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Coupled bulk and brane fields about a de Sitter brane

Cardoso, A., Koyama, K., Mennim, A., Seahra, S. & Wands, D., 3 Apr 2007, In: Physical Review D. 75, 8, p. 084002 1 p.

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Kazuya Koyama

Research output

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