Kazuya Koyama

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University of Portsmouth

United Kingdom

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About

Professor Kazuya Koyama is a faculty member at the University of Portsmouth in the United Kingdom. His research primarily focuses on cosmology, modified gravity, and dark energy, as evidenced by his recent publications, including studies on weak lensing maps and the Euclid mission. He is actively involved in advancing understanding of power spectra analysis and the constraints on various cosmological models.

Recent Grants

Grant: Close

Cosmological tests of gravity

Open Date: 2015-09-01

Close Date: 2020-08-01

Grant: Close

Philip Leverhulme Prize

Open Date: 2009-10-01

Close Date: 2012-09-01

Grant: Close

Non-linear cosmological perturbations

Open Date: 2009-01-01

Close Date: 2010-12-01

Grant: Close

Modified garvity as an alternative to dark energy

Open Date: 2008-10-01

Close Date: 2013-09-01

Articles (20)

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2022

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2022

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2022

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2022

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2022

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2022

Collaborators (60)

Daniel Holz

University of Chicago

UNITED STATES

Kazuya Koyama

Research Interests

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About

Recent Grants

Articles (20)

Euclid preparation - LXII. Simulations and non-linearities beyond Lambda cold dark matter. 1. Numerical methods and validation

Euclid preparation - LXIII. Simulations and non-linearities beyond Lambda cold dark matter. 2. Results from non-standard simulations

Euclid preparation - LXXI. Simulations and nonlinearities beyond ΛCDM. 3. Constraints on f(R) models from the photometric primary probes

Euclid. I. Overview of the Euclid mission

A field-level reaction for screened modified gravity

Dynamical Dark Energy in light of the DESI DR2 Baryonic Acoustic Oscillations Measurements

Fast generation of weak lensing maps in modified gravity with COLA

A cosmological full-shape power spectra analysis using pre- and post-reconstructed density fields

Measuring the redshift-space distortions by cross-correlating the density fields before and after reconstruction

Stochastic inflation beyond slow roll: noise modelling and importance sampling

Cosmology with the Laser Interferometer Space Antenna

Revisiting Vainshtein screening for fast N-body simulations

Non-perturbative non-Gaussianity and primordial black holes

Principal reconstructed modes of dark energy and gravity

Imprints of cosmological tensions in reconstructed gravity

Studying large-scale structure probes of modified gravity with COLA

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

Numerical simulations of stochastic inflation using importance sampling

Gravitational wave interactions in Λ$_{3}$ models of dark energy

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

Collaborators (60)

Daniel Holz

Barry Wardell

Sebastien Clesse

Hans Arnold Winther

Mikael Granvik

Geraldine Servant

Juan Garcia-Bellido

C J A P Martins

Rafael Rebolo

Saeed Rastgoo

Isobel Hook

Savvas Koushiappas

Hooshyar Assadullahi

Sergio Di Domizio

Jussi Valiviita

Seshadri Nadathur

Antonio da Silva

Hannu Kurki-Suonio

Stefano Camera

Ken Osato

Andrei Lazanu

Jon Loveday

Kimmo Kiiveri

Tiago Barreiro

Mikko Pöntinen

Elina Keihänen

Martin Kunz

Lucia F. de la Bella

ESTER RUIZ MORALES

Yannick Copin

Diederik Roest

Joanes Lizarraga

Nikolaos Karnesis

Mesut Çalışkan

Diego Blas

Florian Beutler

Lorenzo Sorbo

Enrico Barausse

Chris Gordon

Peter Coles

Pedro Carrilho

Konstantinos Tanidis

pauline vielzeuf

Christopher Duffy

Ryusuke Jinno

Camille Bonvin

Giorgio Orlando

Oliver Gould

Valtteri Lindholm

Sabino Matarrese

Nicolas Tessore

Levon Pogosian