R. Ishikawa

844 total citations
32 papers, 391 citations indexed

About

R. Ishikawa is a scholar working on Astronomy and Astrophysics, Molecular Biology and Atmospheric Science. According to data from OpenAlex, R. Ishikawa has authored 32 papers receiving a total of 391 indexed citations (citations by other indexed papers that have themselves been cited), including 32 papers in Astronomy and Astrophysics, 12 papers in Molecular Biology and 5 papers in Atmospheric Science. Recurrent topics in R. Ishikawa's work include Solar and Space Plasma Dynamics (32 papers), Stellar, planetary, and galactic studies (15 papers) and Astro and Planetary Science (14 papers). R. Ishikawa is often cited by papers focused on Solar and Space Plasma Dynamics (32 papers), Stellar, planetary, and galactic studies (15 papers) and Astro and Planetary Science (14 papers). R. Ishikawa collaborates with scholars based in Japan, United States and Spain. R. Ishikawa's co-authors include S. Tsuneta, B. W. Lites, T. D. Tarbell, Yukio Katsukawa, Noriyuki Narukage, Ryouhei Kano, Thomas Berger, Z. Frank, K. Kobayashi and A. G. de Wijn and has published in prestigious journals such as The Astrophysical Journal, Astronomy and Astrophysics and Solar Physics.

In The Last Decade

R. Ishikawa

28 papers receiving 369 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
R. Ishikawa Japan 12 365 120 59 24 23 32 391
M. J. Penn United States 12 382 1.0× 68 0.6× 81 1.4× 19 0.8× 10 0.4× 35 419
Dali Georgobiani United States 10 274 0.8× 43 0.4× 35 0.6× 12 0.5× 11 0.5× 23 301
Isabelle Scholl United States 10 296 0.8× 62 0.5× 55 0.9× 5 0.2× 7 0.3× 24 312
Vaibhav Pant India 11 285 0.8× 80 0.7× 28 0.5× 7 0.3× 6 0.3× 34 331
Heesu Yang South Korea 12 303 0.8× 44 0.4× 58 1.0× 14 0.6× 5 0.2× 28 335
L. Zangrilli Italy 9 210 0.6× 31 0.3× 24 0.4× 23 1.0× 17 0.7× 33 236
Sijie Yu United States 14 535 1.5× 100 0.8× 42 0.7× 7 0.3× 8 0.3× 53 585
M. Sigwarth Germany 11 213 0.6× 39 0.3× 39 0.7× 30 1.3× 8 0.3× 30 251
T. Moran United States 11 357 1.0× 54 0.5× 40 0.7× 16 0.7× 10 0.4× 22 386
A. Falchi Italy 9 408 1.1× 62 0.5× 52 0.9× 6 0.3× 7 0.3× 32 414

Countries citing papers authored by R. Ishikawa

Since Specialization
Citations

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

Fields of papers citing papers by R. Ishikawa

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of R. Ishikawa

This figure shows the co-authorship network connecting the top 25 collaborators of R. Ishikawa. A scholar is included among the top collaborators of R. Ishikawa 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 R. Ishikawa. R. Ishikawa 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.
Song, Donguk, R. Ishikawa, David McKenzie, et al.. (2025). Detection of a Magnetic Discontinuity in the Upper Solar Chromosphere Associated with a Coronal Loop Brightening Observed by CLASP2.1. The Astrophysical Journal. 978(2). 140–140. 3 indexed citations
2.
Ishikawa, R., J. Trujillo Bueno, David McKenzie, et al.. (2025). Determining the Magnetic Field in the Atmosphere of a Solar Active Region Observed by the CLASP2.1 Sounding Rocket Experiment. The Astrophysical Journal. 990(2). 200–200. 1 indexed citations
3.
Alemán, Tanausú del Pino, J. Trujillo Bueno, R. Ishikawa, et al.. (2025). Determining the Magnetic Field of Active Region Plages Using the Whole CLASP2/2.1 Spectral Window. The Astrophysical Journal. 991(2). 164–164.
4.
Li, Hao, Tanausú del Pino Alemán, J. Trujillo Bueno, et al.. (2024). Mapping the Longitudinal Magnetic Field in the Atmosphere of an Active Region Plage from the Inversion of the Near-ultraviolet CLASP2.1 Spectropolarimetric Data. The Astrophysical Journal. 974(2). 154–154. 4 indexed citations
5.
Li, Hao, Tanausú del Pino Alemán, J. Trujillo Bueno, et al.. (2023). Tomography of a Solar Plage with the Tenerife Inversion Code. The Astrophysical Journal. 945(2). 144–144. 13 indexed citations
6.
Ishikawa, R., J. Trujillo Bueno, Luca Belluzzi, et al.. (2023). Evidence for the Operation of the Hanle and Magneto-optical Effects in the Scattering Polarization Signals Observed by CLASP2 across the Mg ii h and k Lines. The Astrophysical Journal. 945(2). 125–125. 5 indexed citations
7.
Auchère, F., J. C. Vial, K. Bocchialini, et al.. (2021). Empirical relations between the intensities of Lyman lines of H and He+. Astronomy and Astrophysics. 657. A86–A86. 6 indexed citations
8.
Yoshida, Masaki, Y. Suematsu, R. Ishikawa, et al.. (2019). High-frequency Wave Propagation Along a Spicule Observed by CLASP. The Astrophysical Journal. 887(1). 2–2. 11 indexed citations
9.
Ishikawa, R., H. Uitenbroek, M. Goto, Yusuke Iida, & S. Tsuneta. (2018). Influence of the Atmospheric Model on Hanle Diagnostics. Solar Physics. 293(5). 2 indexed citations
10.
Ishikawa, Shin-­nosuke, Masahito Kubo, Yukio Katsukawa, et al.. (2017). CLASP/SJ Observations of Rapid Time Variations in the Lyα Emission in a Solar Active Region. The Astrophysical Journal. 846(2). 127–127. 4 indexed citations
11.
Katsukawa, Yukio, R. Ishikawa, Noriyuki Narukage, et al.. (2016). Optical alignment of the Chromospheric Lyman-Alpha Spectro-Polarimeter using sophisticated methods to minimize activities under vacuum. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 4 indexed citations
12.
Ishikawa, R., Noriyuki Narukage, Masahito Kubo, et al.. (2014). Strategy for Realizing High-Precision VUV Spectro-Polarimeter. Solar Physics. 289(12). 4727–4747. 13 indexed citations
13.
Ishikawa, R., Ryouhei Kano, Y. Suematsu, et al.. (2013). Birefringence of magnesium fluoride in the vacuum ultraviolet and application to a half-waveplate. Applied Optics. 52(34). 8205–8205. 13 indexed citations
14.
Ishikawa, R. & S. Tsuneta. (2011). THE RELATIONSHIP BETWEEN VERTICAL AND HORIZONTAL MAGNETIC FIELDS IN THE QUIET SUN. The Astrophysical Journal. 735(2). 74–74. 19 indexed citations
15.
Lites, B. W., R. Casini, R. Manso Sainz, et al.. (2010). SCATTERING POLARIZATION IN THE Fe I 630 nm EMISSION LINES AT THE EXTREME LIMB OF THE SUN. The Astrophysical Journal. 713(1). 450–457. 11 indexed citations
16.
Ishikawa, R. & S. Tsuneta. (2009). Comparison of transient horizontal magnetic fields in a plage region and in the quiet Sun. Springer Link (Chiba Institute of Technology). 52 indexed citations
17.
Ishikawa, R., S. Tsuneta, Kiyoshi Ichimoto, et al.. (2008). Transient horizontal magnetic fields in solar plage regions. Springer Link (Chiba Institute of Technology). 56 indexed citations
18.
Wijn, A. G. de, B. W. Lites, Thomas Berger, et al.. (2008). HinodeObservations of Magnetic Elements in Internetwork Areas. The Astrophysical Journal. 684(2). 1469–1476. 55 indexed citations
19.
Ishikawa, R., S. Tsuneta, Y. Suematsu, et al.. (2007). Discovery Of Small-scale Horizontal Magnetic Structures On The Solar Photosphere. AAS. 210. 1 indexed citations
20.
Ishikawa, R., S. Tsuneta, Yukio Katsukawa, et al.. (2007). Relationships between magnetic foot points and G-band bright structures. Astronomy and Astrophysics. 472(3). 911–918. 48 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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