KK
K. Koyama
astro-ph.COgr-qchep-thastro-phhep-phastro-ph.HEastro-ph.GAastro-ph.IMphysics.comp-phphysics.flu-dyn
On Valency
published · living versionsW_3ukvwsjm·v1 · currentpublished
Euclid Quick Data Release (Q1). A systematic study of the intracluster light fraction at 0.2 < z < 1.5
with Euclid Collaboration, H. Gully, N. A. Hatch, H. Gao +311
1 version
Preprints & journals
258 papers in the corpus · 1997–2026Euclid Quick Data Release (Q1). Data processing for intracluster light measurements2610.29682v1 · S. P. Bamford, H. Gao, N. A. Hatch et al.2026 · 0 citationsarXiv
Euclid Quick Data Release (Q1). A systematic study of the intracluster light fraction at 0.2 < z < 1.52610.29684v1 · H. Gully, N. A. Hatch, H. Gao et al.2026 · 0 citationsarXivon Valency
Euclid Quick Data Release (Q1) Euclid spectroscopy of quasars. 2. Physical properties from spectral fitting2609.20947v1 · J. Calhau, G. Calderone, A. Feltre et al.2026 · 0 citationsarXiv
Euclid preparation. The shape of halo profiles in CDM and non-standard cosmologies2609.04192v1 · L. Pizzuti, G. Y. Ferron, A. Ragagnin et al.2026 · 0 citationsarXiv
\textit{Euclid} preparation. Baryon acoustic oscillations extraction techniques: comparison and optimisation2605.03446v1 · E. Sarpa, A. Veropalumbo, M. Bonici et al.2026 · 0 citationsarXiv
Euclid preparation. Refining input galaxy shape distributions for shear calibration simulations2604.26684v1 · H. Jansen, N. Martinet, S. Grandis et al.2026 · 0 citationsarXiv
Euclid. Populating a dark universe with galaxies using SciPIC2604.14802v2 · E. J. Gonzalez, J. Carretero, Z. Baghkhani et al.2026 · 1 citationarXiv
Euclid preparation. Simulated galaxy catalogues for non-standard cosmological models2603.13148v1 · M.-A. Breton, P. Fosalba, S. Avila et al.2026 · 1 citationarXiv
Non-parametric exploration of minimally coupled gravity with phantom crossing2512.13691v2 · Matteo Cataneo, Kazuya Koyama2025 · 0 citationsPhys. Rev. D 113, 122006 (2026)
Dark sector interactions in the limit: velocity locking in pure momentum exchange models2512.11639v2 · Nathan Cruickshank, Robert Crittenden, Kazuya Koyama et al.2025 · 1 citationJCAP07(2026)019
Euclid preparation. Review of forecast constraints on dark energy and modified gravity2512.09748v1 · N. Frusciante, M. Martinelli, L. Lombriser et al.2025 · 0 citationsarXiv
Dark energy constraints in light of theoretical priors2507.19450v3 · Neel Shah, Kazuya Koyama, Johannes Noller2025 · 1 citationarXiv
A field-level reaction for screened modified gravity2506.18876v2 · Daniela Saadeh, Kazuya Koyama, Xan Morice-Atkinson2025 · 0 citationsarXiv
Euclid preparation. Constraining parameterised models of modifications of gravity with the spectroscopic and photometric primary probes2506.03008v1 · I. S. Albuquerque, N. Frusciante, Z. Sakr et al.2025 · 1 citationarXiv
Forecasts for interacting dark energy with time-dependent momentum exchange2504.03555v2 · Nathan Cruickshank, Robert Crittenden, Kazuya Koyama et al.2025 · 10 citationsarXiv
A cosmological full-shape power spectra analysis using pre- and post-reconstructed density fields2503.20574v2 · Weibing Zhang, Ruiyang Zhao, Xiaoyong Mu et al.2025 · 1 citationarXiv
Fast Generation of Weak Lensing Maps in Modified Gravity with COLA2502.14851v2 · Sophie Hoyland, Hans A. Winther, Daniela Saadeh et al.2025 · 2 citationsMon Not R Astron Soc (2025) 3167-3183
Measuring the redshift-space distortions by cross-correlating the density fields before and after reconstruction2502.08186v3 · Weibing Zhang, Ruiyang Zhao, Xiaoyong Mu et al.2025 · 0 citationsarXiv
Dynamical dark energy in light of the DESI DR2 baryonic acoustic oscillations measurements.41415972 · Gu, Gan, Wang, Xiaoma, Wang, Yuting et al.2026 · 71 citationsNature astronomy. 2025;9(12):1879-1889
Yeast diversity during the spontaneous fermentation of wine in a winery and in a laboratory using sterilized equipment.39627922 · Shimizu, Hideaki, Kamada, Aya, Akao, Takeshi et al.2025 · 1 citationJournal of bioscience and bioengineering. 2025;139(2):106-111
Modelling the covariance matrix for the power spectra before and after the BAO reconstruction2410.18524v3 · Ruiyang Zhao, Kazuya Koyama, Yuting Wang et al.2024 · 2 citationsarXiv
Stochastic inflation beyond slow roll: noise modelling and importance sampling2410.13683v2 · Joseph H. P. Jackson, Hooshyar Assadullahi, Andrew D. Gow et al.2024 · 17 citationsJCAP 04 (2025) 073
Euclid preparation. Simulations and nonlinearities beyond CDM. 1. Numerical methods and validation2409.03522v1 · J. Adamek, B. Fiorini, M. Baldi et al.2024 · 8 citationsA&A 695, A230 (2025)
Euclid preparation LXIII. Simulations and nonlinearities beyond CDM. 2. Results from non-standard simulations2409.03523v2 · G. R'acz, M.-A. Breton, B. Fiorini et al.2024 · 5 citationsA&A 695, A232 (2025)
Euclid preparation LXXI. Simulations and nonlinearities beyond CDM. 3. Constraints on models from the photometric primary probes2409.03524v2 · K. Koyama, S. Pamuk, S. Casas et al.2024 · 8 citationsA&A 698, A233 (2025)
Efficient Compression of Redshift-Space Distortion Data for Late-Time Modified Gravity Models2408.16388v2 · Yo Toda, Adria G'omez-Valent, Kazuya Koyama2024 · 7 citationsarXiv
Testing screened modified gravity with SDSS-IV-MaNGA2407.08825v2 · Ricardo G. Landim, Harry Desmond, Kazuya Koyama et al.2024 · 10 citationsMNRAS 534, 349-360 (2024)
Extending MGCAMB tests of gravity to nonlinear scales2406.09204v2 · Zhuangfei Wang, Daniela Saadeh, Kazuya Koyama et al.2024 · 4 citationsarXiv
A field-level emulator for modified gravity2406.03374v2 · Daniela Saadeh, Kazuya Koyama, Xan Morice-Atkinson2024 · 12 citationsMNRAS 537, 448 (2025)
Euclid. I. Overview of the Euclid mission2405.13491v2 · Y. Mellier, Abdurro'uf, J. A. Acevedo Barroso et al.2024 · 622 citationsA&A 697, A1 (2025)
Theory of interacting vector dark energy and fluid2405.06565v2 · Masroor C. Pookkillath, Kazuya Koyama2024 · 4 citationsJCAP10(2024)105
Modeling nonlinear scales with COLA: preparing for LSST-Y12404.12344v2 · Jonathan Gordon, Bernardo F. de Aguiar, Joao Reboucas et al.2024 · 2 citationsarXiv
Cosmological constraints on early dark energy from the full shape analysis of eBOSS DR162312.01977v3 · Rafaela Gsponer, Ruiyang Zhao, Jamie Donald-McCann et al.2023 · 28 citationsarXiv
Euclid preparation. Modelling spectroscopic clustering on mildly nonlinear scales in beyond-CDM models2311.13529v3 · B. Bose, P. Carrilho, M. Marinucci et al.2023 · 15 citationsA&A 689, A275 (2024)
Emulating power spectra for pre- and post-reconstructed galaxy samples2311.05848v2 · Yuting Wang, Ruiyang Zhao, Zhongxu Zhai et al.2023 · 1 citationarXiv
The separate-universe approach and sudden transitions during inflation2311.03281v2 · Joseph H. P. Jackson, Hooshyar Assadullahi, Andrew D. Gow et al.2023 · 39 citationsarXiv
Fast production of cosmological emulators in modified gravity: the matter power spectrum2310.05786v2 · Bartolomeo Fiorini, Kazuya Koyama, Tessa Baker2023 · 22 citationsarXiv
A multitracer analysis for the eBOSS galaxy sample based on the effective field theory of large-scale structure2308.06206v3 · Ruiyang Zhao, Xiaoyong Mu, Rafaela Gsponer et al.2023 · 18 citationsarXiv
Analysis of Unified Galaxy Power Spectrum Multipole Measurements2307.07475v3 · Jamie Donald-McCann, Rafaela Gsponer, Ruiyang Zhao et al.2023 · 23 citationsarXiv
Euclid: Constraining linearly scale-independent modifications of gravity with the spectroscopic and photometric primary probes2306.12368v2 · N. Frusciante, F. Pace, V.F. Cardone et al.2023 · 22 citationsA&A 690, A133 (2024)
Euclid: Constraints on f(R) cosmologies from the spectroscopic and photometric primary probes2306.11053v1 · S.Casas, V.F.Cardone, D.Sapone et al.2023 · 12 citationsarXiv
Revisiting Vainshtein Screening for fast N-body simulations2303.09549v2 · Guilherme Brando, Kazuya Koyama, Hans A. Winther2023 · 12 citationsarXiv
Euclid: Modelling massive neutrinos in cosmology -- a code comparison2211.12457v2 · J. Adamek, R. E. Angulo, C. Arnold et al.2022 · 25 citationsOn behalf of Euclid consortium JCAP06(2023)035
Non-perturbative non-Gaussianity and primordial black holes2211.08348v3 · Andrew D. Gow, Hooshyar Assadullahi, Joseph H. P. Jackson et al.2022 · 103 citationsarXiv
Gravitational wave interactions in models of dark energy2208.03045v2 · A. Emir Gumrukcuoglu, Kazuya Koyama2022 · 1 citationarXiv
Studying large-scale structure probes of modified gravity with COLA2208.01345v2 · Bartolomeo Fiorini, Kazuya Koyama, Albert Izard2022 · 19 citationsarXiv
Numerical simulations of stochastic inflation using importance sampling2206.11234v2 · Joseph H.P. Jackson, Hooshyar Assadullahi, Kazuya Koyama et al.2022 · 34 citationsJCAP 10 (2022) 067
A new consistency test for CDM cosmology using galaxy surveys2204.12647v2 · Jinglan Zheng, Gong-Bo Zhao, Yuting Wang et al.2022 · 1 citationarXiv
Cosmology with the Laser Interferometer Space Antenna2204.05434v1 · Pierre Auclair, David Bacon, Tessa Baker et al.2022 · 341 citationsLiving Rev.Rel. 26 (2023) 1, 5
Enabling matter power spectrum emulation in beyond-CDM cosmologies with COLA2203.11120v2 · Guilherme Brando, Bartolomeo Fiorini, Kazuya Koyama et al.2022 · 22 citationsarXiv
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