Ippei Obata

1.0k total citations
32 papers, 560 citations indexed

About

Ippei Obata is a scholar working on Nuclear and High Energy Physics, Astronomy and Astrophysics and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Ippei Obata has authored 32 papers receiving a total of 560 indexed citations (citations by other indexed papers that have themselves been cited), including 27 papers in Nuclear and High Energy Physics, 25 papers in Astronomy and Astrophysics and 10 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Ippei Obata's work include Cosmology and Gravitation Theories (23 papers), Dark Matter and Cosmic Phenomena (23 papers) and Atomic and Subatomic Physics Research (10 papers). Ippei Obata is often cited by papers focused on Cosmology and Gravitation Theories (23 papers), Dark Matter and Cosmic Phenomena (23 papers) and Atomic and Subatomic Physics Research (10 papers). Ippei Obata collaborates with scholars based in Japan, Germany and United States. Ippei Obata's co-authors include Tomohiro Fujita, Jiro Soda, Yuta Michimura, Koji Nagano, S. Morisaki, Hiromasa Nakatsuka, Takashi Miura, Caner Ünal, Toshiya Namikawa and Takahiro Tanaka and has published in prestigious journals such as Physical Review Letters, Monthly Notices of the Royal Astronomical Society and Physics Letters B.

In The Last Decade

Ippei Obata

32 papers receiving 558 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Ippei Obata Japan 14 465 457 115 53 12 32 560
T. Edwards Netherlands 14 410 0.9× 333 0.7× 66 0.6× 39 0.7× 13 1.1× 22 496
Sebastian A. R. Ellis United States 15 362 0.8× 622 1.4× 80 0.7× 13 0.2× 9 0.8× 32 726
Camilo García-Cely Germany 15 439 0.9× 574 1.3× 66 0.6× 12 0.2× 15 1.3× 24 639
Christian Spethmann Estonia 16 659 1.4× 800 1.8× 26 0.2× 16 0.3× 14 1.2× 22 941
Thomas Helfer United States 13 528 1.1× 275 0.6× 43 0.4× 24 0.5× 5 0.4× 21 565
Malte Buschmann United States 12 354 0.8× 511 1.1× 59 0.5× 11 0.2× 15 1.3× 20 580
Marieke Postma Netherlands 13 610 1.3× 629 1.4× 51 0.4× 33 0.6× 8 0.7× 33 701
Ken’ichi Saikawa Japan 10 516 1.1× 590 1.3× 91 0.8× 11 0.2× 7 0.6× 15 632
Vedran Brdar Germany 18 507 1.1× 877 1.9× 40 0.3× 23 0.4× 13 1.1× 40 991
Enrico Morgante Italy 11 552 1.2× 633 1.4× 35 0.3× 32 0.6× 6 0.5× 19 714

Countries citing papers authored by Ippei Obata

Since Specialization
Citations

This map shows the geographic impact of Ippei Obata'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 Ippei Obata with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ippei Obata more than expected).

Fields of papers citing papers by Ippei Obata

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ippei Obata. 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 Ippei Obata. The network helps show where Ippei Obata may publish in the future.

Co-authorship network of co-authors of Ippei Obata

This figure shows the co-authorship network connecting the top 25 collaborators of Ippei Obata. A scholar is included among the top collaborators of Ippei Obata 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 Ippei Obata. Ippei Obata is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Nakai, Yuichiro, et al.. (2024). Can we explain cosmic birefringence without a new light field beyond Standard Model?. Journal of High Energy Physics. 2024(1). 9 indexed citations
2.
Ferreira, Ricardo Z., et al.. (2024). Axionic defects in the CMB: birefringence and gravitational waves. Journal of Cosmology and Astroparticle Physics. 2024(5). 66–66. 15 indexed citations
3.
Obata, Ippei, et al.. (2024). Testing gravity with frequency-dependent overlap reduction function in Pulsar Timing Array. Journal of Cosmology and Astroparticle Physics. 2024(10). 97–97. 4 indexed citations
4.
Fujimoto, Hiroki, J. Kume, S. Morisaki, et al.. (2023). First results of axion dark matter search with DANCE. Physical review. D. 108(7). 12 indexed citations
5.
Nakai, Yuichiro, Ryo Namba, & Ippei Obata. (2023). Peaky production of light dark photon dark matter. Journal of Cosmology and Astroparticle Physics. 2023(8). 32–32. 6 indexed citations
6.
Nakatsuka, Hiromasa, S. Morisaki, Tomohiro Fujita, et al.. (2023). Stochastic effects on observation of ultralight bosonic dark matter. Physical review. D. 108(9). 13 indexed citations
7.
Fujita, Tomohiro, et al.. (2022). Inflation with two-form field: the production of primordial black holes and gravitational waves. Journal of Cosmology and Astroparticle Physics. 2022(9). 17–17. 2 indexed citations
8.
Michimura, Yuta, Tomohiro Fujita, J. Kume, et al.. (2021). Ultralight dark matter searches with KAGRA gravitational wave telescope. Journal of Physics Conference Series. 2156(1). 12071–12071. 3 indexed citations
9.
Morisaki, S., Tomohiro Fujita, Yuta Michimura, Hiromasa Nakatsuka, & Ippei Obata. (2021). Improved sensitivity of interferometric gravitational-wave detectors to ultralight vector dark matter from the finite light-traveling time. Physical review. D. 103(5). 24 indexed citations
10.
Fujimoto, Hiroki, Masaki Ando, Tomohiro Fujita, et al.. (2021). Dark matter Axion search with riNg Cavity Experiment DANCE: Design and development of auxiliary cavity for simultaneous resonance of linear polarizations. Journal of Physics Conference Series. 2156(1). 12182–12182. 3 indexed citations
11.
Fujimoto, Hiroki, Masaki Ando, Tomohiro Fujita, et al.. (2021). First observation and analysis of DANCE: Dark matter Axion search with riNg Cavity Experiment. Journal of Physics Conference Series. 2156(1). 12042–12042. 2 indexed citations
12.
Fujita, Tomohiro, Ippei Obata, Takahiro Tanaka, & Kei Yamada. (2020). Resonant gravitational waves in dynamical Chern–Simons–axion gravity. Classical and Quantum Gravity. 38(4). 45010–45010. 6 indexed citations
13.
Nagano, Koji, Tomohiro Fujita, Yuta Michimura, & Ippei Obata. (2019). Axion Dark Matter Search with Interferometric Gravitational Wave Detectors. Physical Review Letters. 123(11). 111301–111301. 59 indexed citations
14.
Hayashi, Kohei & Ippei Obata. (2019). OUP accepted manuscript. Monthly Notices of the Royal Astronomical Society. 8 indexed citations
15.
Obata, Ippei, Tomohiro Fujita, & Yuta Michimura. (2018). Optical Ring Cavity Search for Axion Dark Matter. Physical Review Letters. 121(16). 161301–161301. 88 indexed citations
16.
Fujita, Tomohiro, Ippei Obata, Takahiro Tanaka, & Shuichiro Yokoyama. (2018). Statistically anisotropic tensor modes from inflation. Journal of Cosmology and Astroparticle Physics. 2018(7). 23–23. 14 indexed citations
17.
Hiramatsu, Takashi, Shuichiro Yokoyama, Tomohiro Fujita, & Ippei Obata. (2018). Hunting for statistical anisotropy in tensor modes with B-mode observations. Physical review. D. 98(8). 3 indexed citations
18.
19.
Obata, Ippei & Jiro Soda. (2016). Chiral primordial gravitational waves from dilaton induced delayed chromonatural inflation. Physical review. D. 93(12). 50 indexed citations
20.
Obata, Ippei, Takashi Miura, & Jiro Soda. (2015). Chromo-natural inflation in the axiverse. Physical review. D. Particles, fields, gravitation, and cosmology. 92(6). 27 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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