Ryuko Hirata

564 total citations
38 papers, 314 citations indexed

About

Ryuko Hirata is a scholar working on Astronomy and Astrophysics, Computational Mechanics and Instrumentation. According to data from OpenAlex, Ryuko Hirata has authored 38 papers receiving a total of 314 indexed citations (citations by other indexed papers that have themselves been cited), including 31 papers in Astronomy and Astrophysics, 9 papers in Computational Mechanics and 6 papers in Instrumentation. Recurrent topics in Ryuko Hirata's work include Stellar, planetary, and galactic studies (21 papers), Astrophysics and Star Formation Studies (12 papers) and Astrophysical Phenomena and Observations (9 papers). Ryuko Hirata is often cited by papers focused on Stellar, planetary, and galactic studies (21 papers), Astrophysics and Star Formation Studies (12 papers) and Astrophysical Phenomena and Observations (9 papers). Ryuko Hirata collaborates with scholars based in Japan, France and Serbia. Ryuko Hirata's co-authors include Taichi Kato, Akira Okazaki, Kozo Sadakane, Seiji Masuda, Daisaku Nogami, Yuji Ikeda, Hiroshi Akitaya, Koji S. Kawabata, Eiji Kambe and Michiko Ohkubo and has published in prestigious journals such as The Astrophysical Journal, Icarus and Publications of the Astronomical Society of the Pacific.

In The Last Decade

Ryuko Hirata

34 papers receiving 299 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ryuko Hirata Japan 12 296 44 27 23 16 38 314
A. Piccioni Italy 9 227 0.8× 32 0.7× 41 1.5× 26 1.1× 8 0.5× 45 274
M. M. Montgomery United States 10 237 0.8× 34 0.8× 18 0.7× 15 0.7× 9 0.6× 18 246
David R. Rodriguez United States 13 576 1.9× 69 1.6× 17 0.6× 18 0.8× 13 0.8× 34 615
K. A. Antonyuk Russia 9 242 0.8× 24 0.5× 18 0.7× 16 0.7× 25 1.6× 40 253
Yusuke Fujimoto Japan 14 405 1.4× 38 0.9× 33 1.2× 15 0.7× 21 1.3× 29 432
R. Karjalainen Spain 13 384 1.3× 78 1.8× 12 0.4× 12 0.5× 50 3.1× 23 398
W. E. Harris Canada 8 299 1.0× 82 1.9× 94 3.5× 14 0.6× 9 0.6× 14 309
K. Sárneczky Hungary 16 625 2.1× 101 2.3× 66 2.4× 32 1.4× 15 0.9× 51 636
E. H. Geyer Germany 8 156 0.5× 41 0.9× 5 0.2× 22 1.0× 17 1.1× 44 197
H. Kučáková Czechia 10 312 1.1× 87 2.0× 29 1.1× 18 0.8× 15 0.9× 45 317

Countries citing papers authored by Ryuko Hirata

Since Specialization
Citations

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

Fields of papers citing papers by Ryuko Hirata

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ryuko Hirata

This figure shows the co-authorship network connecting the top 25 collaborators of Ryuko Hirata. A scholar is included among the top collaborators of Ryuko Hirata 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 Ryuko Hirata. Ryuko Hirata 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.
Ozaki, Shinobu, et al.. (2007). Pleione (28 Tau) is now forming a new disk. 38. 19–21. 1 indexed citations
2.
Sadakane, Kozo, Ryuko Hirata, & Takashi Tsuji. (2005). Forty Years of Spectroscopic Stellar Astrophysics in Japan. Publications of the Astronomical Society of Japan. 57(1). 1–12. 7 indexed citations
3.
Ikeda, Yuji, et al.. (2003). Development of high-resolution spectropolarimeter: LIPS. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 4843. 437–437. 10 indexed citations
4.
Uemura, Makoto, et al.. (2000). Galactic Rotation Derived from OB Stars Using Hipparcos Proper Motions and Radial Velocities. Publications of the Astronomical Society of Japan. 52(1). 143–151. 14 indexed citations
5.
Baba, Hajime, Taichi Kato, Daisaku Nogami, et al.. (2000). Discovery of a New SU UMa-Type Dwarf Nova, V 1028 Cygni. Publications of the Astronomical Society of Japan. 52(3). 429–436. 17 indexed citations
6.
Kambe, Eiji, et al.. (2000). NRP Modeling of the Line Profile Variations ofλEri in the 1994 Campaign. International Astronomical Union Colloquium. 175. 252–255. 2 indexed citations
7.
Nogami, Daisaku, Seiji Masuda, Taichi Kato, & Ryuko Hirata. (1999). Spectroscopic and Photometric Observations of a Z Cam-Type Dwarf Nova, AT Cancri, in Standstill. Publications of the Astronomical Society of Japan. 51(1). 115–125. 16 indexed citations
8.
Kawabata, Koji S., Akira Okazaki, Hiroshi Akitaya, et al.. (1999). A New Spectropolarimeter at the Dodaira Observatory. Publications of the Astronomical Society of the Pacific. 111(761). 898–908. 29 indexed citations
9.
Mukai, T., et al.. (1997). Polarimetric Observations of 4179 Toutatis in 1992/1993. Icarus. 127(2). 452–460. 13 indexed citations
10.
Ishiguro, Masateru, et al.. (1997). Maximum Visible Polarization of 4179 Toutatis in the Apparition of 1996. Publications of the Astronomical Society of Japan. 49(5). L31–L34. 20 indexed citations
11.
Kato, Taichi, Daisaku Nogami, Seiji Masuda, & Ryuko Hirata. (1996). Discovery of a New SU UMa-Type Dwarf Nova, V1113 Cygni. Publications of the Astronomical Society of Japan. 48(1). 45–49. 2 indexed citations
12.
Hirata, Ryuko, et al.. (1996). Period Analysis of the Radial Velocity in Pleione. Publications of the Astronomical Society of Japan. 48(2). 317–334. 17 indexed citations
13.
Hirata, Ryuko. (1995). Interpretation of the Long-Term Variation in Late-Type Active Be Stars. Publications of the Astronomical Society of Japan. 47(2). 195–218. 3 indexed citations
14.
Ito, Masaki, et al.. (1994). Radiatively driven winds of OB stars. Symposium - International Astronomical Union. 162. 487–489. 2 indexed citations
15.
Vakili, F., et al.. (1984). On the Upper Limit of the Angular Diameter of Gamma Cassiopeiae with the Two-Telescope Interferometer at CERGA. Publications of the Astronomical Society of Japan. 36(2). 231–237. 1 indexed citations
16.
Hirata, Ryuko, et al.. (1984). Metallic Line Analysis of Pleione. II. 1977-1979. Publications of the Astronomical Society of Japan. 36(3). 577–592. 1 indexed citations
17.
Hirata, Ryuko, et al.. (1982). Spectroscopic Study of Pleione in 1977–1979. Symposium - International Astronomical Union. 98. 161–165. 1 indexed citations
18.
Hirata, Ryuko. (1982). Long-Term Variation of Be Stars on the Color-Magnitude Diagram. Symposium - International Astronomical Union. 98. 41–44. 2 indexed citations
19.
Hirata, Ryuko, et al.. (1978). On the Formation of Hydrogen Shell Spectrum and the Envelopes of Some Shell Stars. Publications of the Astronomical Society of Japan. 30(2). 385–407. 2 indexed citations
20.
Hirata, Ryuko, et al.. (1976). The Spectral Variation of Pleione in 1969–1975. Publications of the Astronomical Society of Japan. 28(3). 509–515. 6 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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