Toshiya Namikawa

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Project Assistant Professor

University of Tokyo

Japan

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About

Toshiya Namikawa is a Project Assistant Professor at the University of Tokyo, Japan. His research focuses on primordial gravitational waves, cosmic birefringence, and the cosmic microwave background, as evidenced by his recent publications on topics such as inflationary gravitational waves and dark matter constraints. He employs advanced simulation techniques and cross-correlation methods to improve the understanding of astrophysical phenomena.

Recent Grants

Grant: Close

宇宙マイクロ波背景放射を用いた原始重力波検証における高次相関関数の解析手法の確立

Open Date: 2022-04-01

Close Date: 2025-03-31

Grant: Close

Searching for the primordial gravitational waves by removing contaminants from CMB lensing

Open Date: 2018-01-01

Close Date: 2021-07-01

Grant: Close

Probing fundamental issues in cosmology with a measurement of weak lensing through CMB observations

Open Date: 2014-09-01

Close Date: 2016-08-01

Grant: Close

Cosmology from weak gravitational lensing of Cosmic Microwave Background

Open Date: 2013-08-30

Close Date: 2015-03-31

Grant: Close

Cosmology from weak gravitational lensing of cosmic microwave background

Open Date: 2013-04-01

Close Date: 2015-03-01

Articles (19)

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2022

Collaborators (13)

Tommaso Ghigna

Assistant Professor

High Energy Accelerator Research Organization

JAPAN

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Arthur Kosowsky

Professor

University of Pittsburgh

UNITED STATES

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Andrea Tartari

Istituto Nazionale di Fisica Nucleare

ITALY

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Neelima Sehgal

Associate Professor

Stony Brook University

UNITED STATES

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John Kovac

Harvard University

UNITED STATES

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Colin Bischoff

Associate Professor

University of Cincinnati

UNITED STATES

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Abigail Vieregg

Professor

University of Chicago

UNITED STATES

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Giorgio Orlando

Jagiellonian University

POLAND

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Patricio Vielva

Instituto de Física de Cantabria

SPAIN

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Bryan Steinbach

California Institute of Technology

UNITED STATES

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Jeffrey Filippini

Associate Professor

University of Illinois Urbana–Champaign

UNITED STATES

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Pieter Meerburg

Assistant Professor

Rijksuniversiteit Groningen

NETHERLANDS

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Benjamin Racine

FRANCE

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Toshiya Namikawa

Research Interests

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About

Recent Grants

Articles (19)

Probing inflationary gravitational waves with cross-correlations: Improved forecasting and validation with simulations

Impact of the reionization history on constraining primordial gravitational waves in future all-sky cosmic microwave background experiments

Tomographic constraint on anisotropic cosmic birefringence

LiteBIRD science goals and forecasts: improving sensitivity to inflationary gravitational waves with multitracer delensing

Exact CMB <math display="inline"><mrow><mi>B</mi></mrow></math>-mode power spectrum from anisotropic cosmic birefringence

Efficient estimation of rotation-induced bias to reconstructed CMB lensing power spectrum

Constraining ultralight ALP dark matter in light of cosmic birefringence

BICEP/Keck. XVII. Line-of-sight Distortion Analysis: Estimates of Gravitational Lensing, Anisotropic Cosmic Birefringence, Patchy Reionization, and Systematic Errors

BICEP/Keck. XVI. Characterizing Dust Polarization through Correlations with Neutral Hydrogen

Cosmic birefringence tomography and calibration independence with reionization signals in the CMB

Impact of anisotropic birefringence on measuring cosmic microwave background lensing

Isotropic cosmic birefringence from early dark energy

The reconstructed CMB lensing bispectrum

Cosmic birefringence tomography with polarized Sunyaev-Zel’dovich effect

New Probe of Inflationary Gravitational Waves: Cross-Correlations of Lensed Primary CMB <math display="inline"><mi>B</mi></math>-Modes with Large-Scale Structure

Bicep/Keck XV: The Bicep3 Cosmic Microwave Background Polarimeter and the First Three-year Data Set

BICEP/ Keck XIV: Improved constraints on axionlike polarization oscillations in the cosmic microwave background

Finding evidence for inflation and the origin of galactic magnetic fields with CMB surveys

Is cosmic birefringence due to dark energy or dark matter? A tomographic approach

Collaborators (13)

Tommaso Ghigna

Arthur Kosowsky

Andrea Tartari

Neelima Sehgal

John Kovac

Colin Bischoff

Abigail Vieregg

Giorgio Orlando

Patricio Vielva

Bryan Steinbach

Jeffrey Filippini

Pieter Meerburg

Benjamin Racine

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