Toshiya Namikawa

5.5k total citations
54 papers, 755 citations indexed

About

Toshiya Namikawa is a scholar working on Astronomy and Astrophysics, Nuclear and High Energy Physics and Oceanography. According to data from OpenAlex, Toshiya Namikawa has authored 54 papers receiving a total of 755 indexed citations (citations by other indexed papers that have themselves been cited), including 52 papers in Astronomy and Astrophysics, 27 papers in Nuclear and High Energy Physics and 5 papers in Oceanography. Recurrent topics in Toshiya Namikawa's work include Cosmology and Gravitation Theories (50 papers), Galaxies: Formation, Evolution, Phenomena (34 papers) and Radio Astronomy Observations and Technology (19 papers). Toshiya Namikawa is often cited by papers focused on Cosmology and Gravitation Theories (50 papers), Galaxies: Formation, Evolution, Phenomena (34 papers) and Radio Astronomy Observations and Technology (19 papers). Toshiya Namikawa collaborates with scholars based in Japan, United States and United Kingdom. Toshiya Namikawa's co-authors include Atsushi Taruya, Ryuichi Takahashi, Daisuke Yamauchi, Duncan Hanson, Blake D. Sherwin, A. Nishizawa, Eiichiro Komatsu, Kai Murai, Ryo Nagata and F. R. Bouchet and has published in prestigious journals such as Physical Review Letters, Monthly Notices of the Royal Astronomical Society and Physical review. D.

In The Last Decade

Toshiya Namikawa

53 papers receiving 750 citations

Peers

Toshiya Namikawa

NHEP

INSTR

OCEAN

AMPO

Duncan Hanson United States

Jo Dunkley United States

Blake D. Sherwin United States

Kavilan Moodley South Africa

Claudio Llinares Norway

M. Millea United States

M. Ballardini Italy

Vivian Miranda United States

Erminia Calabrese United Kingdom

Matteo Biagetti Switzerland

Duncan Hanson United States

Toshiya Namikawa

684 ×1.0

305 ×0.9

NHEP

39 ×0.5

INSTR

88 ×1.3

OCEAN

18 ×0.5

AMPO

Citations per year, relative to Toshiya Namikawa Toshiya Namikawa (= 1×) peers Duncan Hanson

Countries citing papers authored by Toshiya Namikawa

Since Specialization

Citations

This map shows the geographic impact of Toshiya Namikawa's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Toshiya Namikawa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Toshiya Namikawa more than expected).

Fields of papers citing papers by Toshiya Namikawa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Toshiya Namikawa. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Toshiya Namikawa. The network helps show where Toshiya Namikawa may publish in the future.

Co-authorship network of co-authors of Toshiya Namikawa

This figure shows the co-authorship network connecting the top 25 collaborators of Toshiya Namikawa. A scholar is included among the top collaborators of Toshiya Namikawa based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Toshiya Namikawa. Toshiya Namikawa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Namikawa, Toshiya, et al.. (2025). Impact of the reionization history on constraining primordial gravitational waves in future all-sky cosmic microwave background experiments. Physical review. D. 111(8). 1 indexed citations

Cai, Hongbo, Yilun Guan, Toshiya Namikawa, & Arthur Kosowsky. (2024). Efficient estimation of rotation-induced bias to reconstructed CMB lensing power spectrum. Physical review. D. 110(10). 1 indexed citations

Namikawa, Toshiya, S. Azzoni, Irene Abril-Cabezas, et al.. (2024). The Simons Observatory: Combining cross-spectral foreground cleaning with multitracer B-mode delensing for improved constraints on inflation. Physical review. D. 110(4). 7 indexed citations

Cai, Hongbo, Yilun Guan, Toshiya Namikawa, & Arthur Kosowsky. (2023). Impact of anisotropic birefringence on measuring cosmic microwave background lensing. Physical review. D. 107(4). 8 indexed citations

Eskilt, Johannes R., et al.. (2023). Constraints on Early Dark Energy from Isotropic Cosmic Birefringence. Physical Review Letters. 131(12). 121001–121001. 34 indexed citations

Murai, Kai, et al.. (2023). Isotropic cosmic birefringence from early dark energy. Physical review. D. 107(4). 39 indexed citations

Orlando, Giorgio, et al.. (2023). The reconstructed CMB lensing bispectrum. Journal of Cosmology and Astroparticle Physics. 2023(4). 41–41. 3 indexed citations

Namikawa, Toshiya, et al.. (2023). Gravitational lensing effect on cosmic birefringence. Physical review. D. 108(6). 12 indexed citations

Sherwin, Blake D. & Toshiya Namikawa. (2023). Cosmic birefringence tomography and calibration independence with reionization signals in the CMB. Monthly Notices of the Royal Astronomical Society. 520(3). 3298–3304. 19 indexed citations

10.

Namikawa, Toshiya & Blake D. Sherwin. (2023). New Probe of Inflationary Gravitational Waves: Cross-Correlations of Lensed Primary CMB B-Modes with Large-Scale Structure. Physical Review Letters. 131(13). 131001–131001. 1 indexed citations

11.

Qu, Frank J., Blake D. Sherwin, Omar Darwish, Toshiya Namikawa, & Mathew S. Madhavacheril. (2023). Probing early structure and model-independent neutrino mass with high-redshift CMB lensing mass maps. Physical review. D. 107(12). 8 indexed citations

12.

Jung, Gabriel, Toshiya Namikawa, M. Liguori, D. Munshi, & Alan Heavens. (2021). The integrated angular bispectrum of weak lensing. Journal of Cosmology and Astroparticle Physics. 2021(6). 55–55. 6 indexed citations

13.

Namikawa, Toshiya, Y. Chinone, Hironao Miyatake, et al.. (2019). Evidence for the cross-correlation between cosmic icrowave background polarization lensing from Polarbear and cosmic shear from Subaru Hyper Suprime-Cam. Figshare. 10 indexed citations

14.

Namikawa, Toshiya, Shohei Saga, Daisuke Yamauchi, & Atsushi Taruya. (2019). CMB constraints on the stochastic gravitational-wave background at Mpc scales. Physical review. D. 100(2). 19 indexed citations

15.

Namikawa, Toshiya & Ryuichi Takahashi. (2019). Impact of nonlinear growth of the large-scale structure on CMB B-mode delensing. Physical review. D. 99(2). 4 indexed citations

16.

Namikawa, Toshiya, F. R. Bouchet, & Atsushi Taruya. (2018). CMB lensing bispectrum as a probe of modified gravity theories. Physical review. D. 98(4). 12 indexed citations

17.

Böhm, Vanessa, Blake D. Sherwin, Jia Liu, et al.. (2018). Effect of non-Gaussian lensing deflections on CMB lensing measurements. Physical review. D. 98(12). 25 indexed citations

18.

Namikawa, Toshiya, A. Nishizawa, & Atsushi Taruya. (2016). Anisotropies of Gravitational-Wave Standard Sirens as a New Cosmological Probe without Redshift Information. Physical Review Letters. 116(12). 121302–121302. 40 indexed citations

19.

Taruya, Atsushi, et al.. (2016). Constraining higher-order parameters for primordial non-Gaussianities from power spectra and bispectra of imaging surveys. Physical review. D. 93(10). 6 indexed citations

20.

Namikawa, Toshiya, Daisuke Yamauchi, & Atsushi Taruya. (2012). Full-sky lensing reconstruction of gradient and curl modes from CMB maps. Journal of Cosmology and Astroparticle Physics. 2012(1). 7–7. 35 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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