Kazuya Koyama

2024

A field-level emulator for modified gravity

Saadeh, D., Koyama, K. & Morice-Atkinson, X., 20 Dec 2024, (Accepted for publication) In: Monthly Notices of the Royal Astronomical Society. 17 p.

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A multitracer analysis for the eBOSS galaxy sample based on the effective field theory of large-scale structure

Zhao, R., Mu, X., Gsponer, R., Donald-McCann, J., Feng, Y., Zhang, W., Wang, Y., Zhao, G.-B., Koyama, K., Bacon, D. & Crittenden, R. G., 2 Jul 2024, In: Monthly Notices of the Royal Astronomical Society. 532, 1, p. 783–804

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Cosmological constraints on early dark energy from the full shape analysis of eBOSS DR16

Gsponer, R., Zhao, R., Donald-McCann, J., Bacon, D., Koyama, K., Crittenden, R., Simon, T. & Mueller, E.-M., 1 May 2024, In: Monthly Notices of the Royal Astronomical Society. 530, 3, p. 3075–3099

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Efficient compression of redshift-space distortion data for late-time modified gravity models

Toda, Y., Gómez-Valent, A. & Koyama, K., 11 Nov 2024, (Accepted for publication) In: Journal of Cosmology and Astroparticle Physics.

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Emulating power spectra for pre- and post-reconstructed galaxy samples

Wang, Y., Zhao, R., Zhai, Z., Koyama, K., Percival, W. J., Guo, H., Li, Y., Zhao, G.-B., Nishimichi, T., Gil-Marín, H., Feng, Y., Zhang, H. & Wu, Y., 24 Feb 2024, (Accepted for publication) In: The Astrophysical Journal.

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Emulating power spectra for prereconstructed and postreconstructed galaxy samples

Wang, Y., Zhao, R., Zhai, Z., Koyama, K., Percival, W. J., Guo, H., Li, Y., Zhao, G. B., Nishimichi, T., Gil-Marín, H., Feng, Y., Zhang, H. & Wu, Y., 1 May 2024, In: Astrophysical Journal. 966, 1, 15 p., 35.

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Euclid. I. Overview of the Euclid mission

Euclid Collaboration, Bacon, D., Collett, T. E., Fiorini, B., Gaztanaga, E., Joudaki, S., Koyama, K., Maraston, C., Nadathur, S., Noller, J., Pattison, C., Whalen, D. J., Youles, S. & Fonseca De La Bella, L., 29 Aug 2024, (Accepted for publication) In: Astronomy and Astrophysics.

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Euclid preparation. XLIV. Modelling spectroscopic clustering on mildly nonlinear scales in beyond-ΛCDM models

Euclid Collaboration, Koyama, K., Bella, L. F. D. L., Fiorini, B., Amara, A., Joudaki, S. & Nadathur, S., 24 Sept 2024, In: Astronomy and Astrophysics. 689, 29 p., A275.

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Extending MGCAMB tests of gravity to nonlinear scales

Wang, Z., Saadeh, D., Koyama, K., Pogosian, L., Bose, B., Yi, L. & Zhao, G.-B., 15 Oct 2024, (Accepted for publication) In: Journal of Cosmology and Astroparticle Physics.

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Extracting high-order cosmological information in galaxy surveys with power spectra

Wang, Y., Zhao, G.-B., Koyama, K., Percival, W. J., Takahashi, R., Hikage, C., Gil-Marín, H., Hahn, C., Zhao, R., Zhang, W., Mu, X., Yu, Y., Zhu, H.-M. & Ge, F., 18 Apr 2024, In: Communications Physics. 7, 9 p., 130.

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Modeling nonlinear scales with COLA: preparing for LSST-Y1

Gordon, J., Aguiar, B. F. D., Rebouças, J., Brando, G., Falciano, F., Miranda, V., Koyama, K. & Winther, H. A., 21 Aug 2024, (Accepted for publication) In: Monthly Notices of the Royal Astronomical Society.

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Modelling the covariance matrix for the power spectra before and after the BAO reconstruction

Zhao, R., Koyama, K., Wang, Y. & Zhao, G.-B., 24 Oct 2024, (Accepted for publication) In: Research in Astronomy and Astrophysics.

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Testing screened modified gravity with SDSS-IV-MaNGA

Landim, R. G., Desmond, H., Koyama, K. & Penny, S., 1 Oct 2024, In: Monthly Notices of the Royal Astronomical Society. 534, 1, p. 349–360

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Theory of interacting vector dark energy and fluid

Pookkillath, M. C. & Koyama, K., 15 Oct 2024, (Accepted for publication) In: Journal of Cosmology and Astroparticle Physics.

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The separate-universe approach and sudden transitions during inflation

Jackson, J. H. P., Assadullahi, H., Gow, A. D., Koyama, K., Vennin, V. & Wands, D., 9 May 2024, In: Journal of Cosmology and Astroparticle Physics. 2024, 5, 35 p., 053.

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2023

Analysis of unified galaxy power spectrum multipole measurements

Donald-McCann, J., Gsponer, R., Zhao, R., Koyama, K. & Beutler, F., 1 Dec 2023, In: Monthly Notices of the Royal Astronomical Society. 526, 3, p. 3461–3481

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Cosmology with the Laser Interferometer Space Antenna

Auclair, P., Bacon, D., Baker, T., Barreiro, T., Bartolo, N., Belgacem, E., Bellomo, N., Ben-Dayan, I., Bertacca, D., Besancon, M., Blanco-Pillado, J. J., Blas, D., Boileau, G., Calcagni, G., Caldwell, R., Caprini, C., Carbone, C., Chang, C.-F., Chen, H.-Y. & Christensen, N. & 159 others, Clesse, S., Comelli, D., Congedo, G., Contaldi, C., Crisostomi, M., Croon, D., Cui, Y., Cusin, G., Cutting, D., Dalang, C., Luca, V. D., Pozzo, W. D., Desjacques, V., Dimastrogiovanni, E., Dorsch, G. C., Ezquiaga, J. M., Fasiello, M., Figueroa, D. G., Flauger, R., Franciolini, G., Frusciante, N., Fumagalli, J., Garcia-Bellido, J., Gould, O., Holz, D., Iacconi, L., Jain, R. K., Jenkins, A. C., Jinno, R., Joana, C., Karnesis, N., Konstandin, T., Koyama, K., Kozaczuk, J., Kuroyanagi, S., Laghi, D., Lewicki, M., Lombriser, L., Madge, E., Maggiore, M., Malhotra, A., Mancarella, M., Mandic, V., Mangiagli, A., Matarrese, S., Mazumdar, A., Mukherjee, S., Musco, I., Nardini, G., No, J. M., Papanikolaou, T., Peloso, M., Pieroni, M., Pilo, L., Raccanelli, A., Renaux-Petel, S., Renzini, A. I., Ricciardone, A., Riotto, A., Romano, J. D., Rollo, R., Pol, A. R., Morales, E. R., Sakellariadou, M., Saltas, I. D., Scalisi, M., Schmitz, K., Schwaller, P., Sergijenko, O., Servant, G., Simakachorn, P., Sorbo, L., Sousa, L., Speri, L., Steer, D. A., Tamanini, N., Tasinato, G., Torrado, J., Unal, C., Vennin, V., Vernieri, D., Vernizzi, F., Volonteri, M., Wachter, J. M., Wands, D., Witkowski, L. T., Zumalacárregui, M., Annis, J., Ares, F. R., Avelino, P. P., Avgoustidis, A., Barausse, E., Bonilla, A., Bonvin, C., Bosso, P., Calabrese, M., Çalışkan, M., Cembranos, J. A. R., Chala, M., Chernoff, D., Clough, K., Criswell, A., Das, S., Silva, A. D., Dayal, P., Domcke, V., Durrer, R., Easther, R., Escoffier, S., Ferrans, S., Fryer, C., Gair, J., Gordon, C., Hendry, M., Hindmarsh, M., Hooper, D. C., Kajfasz, E., Kopp, J., Koushiappas, S. M., Kumar, U., Kunz, M., Lagos, M., Lilley, M., Lizarraga, J., Lobo, F. S. N., Maleknejad, A., Martins, C. J. A. P., Meerburg, P. D., Meyer, R., Mimoso, J. P., Nesseris, S., Nunes, N., Oikonomou, V., Orlando, G., Özsoy, O., Pacucci, F., Palmese, A., Petiteau, A., Pinol, L., Zwart, S. P., Pratten, G., Prokopec, T., Quenby, J., Rastgoo, S., Roest, D., Rummukainen, K., Schimd, C., Secroun, A., Sopuerta, C. F., Tereno, I., Tolley, A., Urrestilla, J., Vagenas, E. C., Vis, J. V. D., Weygaert, R. V. D., Wardell, B., Weir, D. J., Świeżewska, B. & Zhdanov, V. I., 23 Aug 2023, In: Living Reviews in Relativity. 26, 5, 254 p., 5.

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Euclid: Modelling massive neutrinos in cosmology -- a code comparison

Euclid Consortium, Bose, B., Fidler, C., Koyama, K., Tram, T., Winther, H. A. & Percival, W. J., 16 Jun 2023, In: Journal of Cosmology and Astroparticle Physics. 2023, 06, 50 p., 035.

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Fast production of cosmological emulators in modified gravity: the matter power spectrum

Fiorini, B., Koyama, K. & Baker, T., 22 Dec 2023, In: Journal of Cosmology and Astroparticle Physics. 2023, 12, 26 p., 045.

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Non-perturbative non-Gaussianity and primordial black holes

Gow, A. D., Assadullahi, H., Jackson, J. H. P., Koyama, K., Vennin, V. & Wands, D., 30 May 2023, In: Europhysics Letters. 142, 4, 7 p., 49001.

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Principal reconstructed modes of dark energy and gravity

Raveri, M., Pogosian, L., Martinelli, M., Koyama, K., Silvestri, A. & Zhao, G.-B., 28 Feb 2023, In: Journal of Cosmology and Astroparticle Physics. 2023, 02, 20 p., 061.

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Revisiting Vainshtein screening for fast N-body simulations

Brando, G., Koyama, K. & Winther, H. A., 20 Jun 2023, In: Journal of Cosmology and Astroparticle Physics. 2023, 06, 38 p., 045.

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2022

A new consistency test for ΛCDM cosmology using galaxy surveys

Zheng, J., Zhao, G.-B., Wang, Y., Mu, X., Zhao, R., Zhang, W., Yuan, S., Bacon, D. & Koyama, K., 26 May 2022, In: Research in Astronomy and Astrophysics. 22, 6, 7 p., 065016.

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Enabling matter power spectrum emulation in beyond-ΛCDM cosmologies with COLA

Brando, G., Fiorini, B., Koyama, K. & Winther, H. A., 19 Sept 2022, In: Journal of Cosmology and Astroparticle Physics. 09, 051, 33 p., 051.

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Gravitational wave interactions in Λ₃ models of dark energy

Gumrukcuoglu, A. E. & Koyama, K., 10 Oct 2022, In: Journal of Cosmology and Astroparticle Physics. 2022, 10, 22 p., 025.

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Imprints of cosmological tensions in reconstructed gravity

Pogosian, L., Raveri, M., Koyama, K., Martinelli, M., Silvestri, A. & Zhao, G.-B., 1 Dec 2022, In: Nature Astronomy. 6, p. 1484–1490 7 p.

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matryoshka: Halo Model Emulator for the Galaxy Power Spectrum

Donald-McCann, J., Beutler, F., Koyama, K. & Karamanis, M., 1 Apr 2022, In: Monthly Notices of the Royal Astronomical Society. 511, 3, p. 3768–3784

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matryoshka II: accelerating effective field theory analyses of the galaxy power spectrum

Donald-McCann, J., Koyama, K. & Beutler, F., 16 Nov 2022, (Early online) In: Monthly Notices of the Royal Astronomical Society.

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Numerical simulations of stochastic inflation using importance sampling

Jackson, J. H. P., Assadullahi, H., Koyama, K., Vennin, V. & Wands, D., 21 Oct 2022, In: Journal of Cosmology and Astroparticle Physics. 2022, 10, 32 p., 067.

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Studying large-scale structure probes of modified gravity with COLA

Fiorini, B., Koyama, K. & Izard, A., 19 Dec 2022, In: Journal of Cosmology and Astroparticle Physics. 2022, 12, 33 p., 028.

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2021

Early modified gravity in light of the H₀ tension and LSS data

Braglia, M., Ballardini, M., Finelli, F. & Koyama, K., 19 Feb 2021, In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 103, 4, 23 p.

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Fast generation of mock galaxy catalogues in modified gravity models with COLA

Fiorini, B., Koyama, K., Winther, H. A., Wright, B. S., Li, B. & Izard Alberich, A., 15 Sept 2021, In: Journal of Cosmology and Astroparticle Physics. 2021, 9, 26 p., 021.

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Fully relativistic predictions in Horndeski gravity from standard Newtonian N-body simulations

Brando, G., Koyama, K., Wands, D., Zumalacárregui, M., Sawicki, I. & Bellini, E., 16 Sept 2021, In: Journal of Cosmology and Astroparticle Physics. 2021, 09, 29 p., 024.

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Investigating cosmological GAN emulators using latent space interpolation

Tamosiunas, A., Winther, H. A., Koyama, K., Bacon, D. J., Nichol, R. C. & Mawdsley, B., 1 Sept 2021, In: Monthly Notices of the Royal Astronomical Society. 506, 2, p. 3049-3067 19 p.

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Relativistic corrections to the growth of structure in modified gravity

Brando, G., Koyama, K. & Wands, D., 8 Jan 2021, In: Journal of Cosmology and Astroparticle Physics. 2021, 01, 23 p., 013.

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Testing the equivalence principle on cosmological scales using the odd multipoles of galaxy cross-power spectrum and bispectrum

Umeh, O., Koyama, K. & Crittenden, R., 23 Aug 2021, In: Journal of Cosmology and Astroparticle Physics. 2021, 08, 29 p., 049.

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The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: a multi-tracer analysis in Fourier space for measuring the cosmic structure growth and expansion rate

Zhao, G.-B., Wang, Y., Taruya, A., Zhang, W., Gil-Marin, H., Mattia, A. D., Ross, A. J., Raichoor, A., Zhao, C., Percival, W. J., Alam, S., Bautista, J. E., Burtin, E., Chuang, C.-H., Hou, J., Dawson, K. S., Kneib, J.-P., Koyama, K., Bourboux, H. D. M. D. & Mueller, E.-M. & 6 others, Newman, J. A., Peacock, J. A., Rossi, G., Ruhlmann-Kleider, V., Schneider, D. P. & Shafieloo, A., 1 Jun 2021, In: Monthly Notices of the Royal Astronomical Society. 504, 1, p. 33-52

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The Novel Probes Project: tests of gravity on astrophysical scales

Baker, T., Barreira, A., Desmond, H., Ferreira, P., Jain, B., Koyama, K., Li, B., Lombriser, L., Nicola, A., Sakstein, J. & Schmidt, F., 10 Feb 2021, In: Reviews of Modern Physics. 93, 1, 015003.

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Towards testing the theory of gravity with DESI: summary statistics, model predictions and future simulation requirements

Alam, S., Arnold, C., Aviles, A., Bean, R., Cai, Y.-C., Cautun, M., Cervantes-Cota, J. L., Cuesta-Lazaro, C., Devi, N. C., Eggemeier, A., Fromenteau, S., Gonzalez-Morales, A. X., Halenka, V., He, J.-H., Hernandez-Aguayo, C., Ishak, M., Koyama, K., Li, B., Macorra, A. D. L. & Rizo, J. M. & 11 others, Miller, C., Niz, G., Ntelis, P., Otero, M. R., Slepian, Z., Stark, A., Valenzuela, O., Valogiannis, G., Vargas-Magana, M., Zarrouk, P. & Zheng, Y., 25 Nov 2021, In: Journal of Cosmology and Astroparticle Physics. 2021, 11, 105 p., 050.

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Vainshtein mechanism in Generalised Massive Gravity

Gumrukcuoglu, E., Kimura, R., Kenna-Allison, M. & Koyama, K., 16 Sept 2021, In: Journal of Cosmology and Astroparticle Physics. 2021, 09, 26 p., 023.

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2020

A larger value for H₀ by an evolving gravitational constant

Braglia, M., Ballardini, M., Emond, W. T., Finelli, F., Gumrukcuoglu, A. E., Koyama, K. & Paoletti, D., 17 Jul 2020, In: Physical Review D. 101, 2, 12 p., 023529.

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Cosmic acceleration and growth of structure in massive gravity

Kenna-Allison, M., Gumrukcuoglu, A. E. & Koyama, K., 19 Nov 2020, In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 102, 10, 15 p., 103524.

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Covariance of the redshift-space matter power spectrum after reconstruction

Hikage, C., Takahashi, R. & Koyama, K., 15 Oct 2020, In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 102, 8, 14 p.

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Marked correlation functions in perturbation theory

Aviles, A., Koyama, K., Cervantes-Cota, J. L., Winther, H. A. & Li, B., 2 Jan 2020, In: Journal of Cosmology and Astroparticle Physics. 2020, 1, 35 p., 006.

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