R. S. I. Ryans

4.6k total citations
58 papers, 1.7k citations indexed

About

R. S. I. Ryans is a scholar working on Astronomy and Astrophysics, Instrumentation and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, R. S. I. Ryans has authored 58 papers receiving a total of 1.7k indexed citations (citations by other indexed papers that have themselves been cited), including 55 papers in Astronomy and Astrophysics, 26 papers in Instrumentation and 15 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in R. S. I. Ryans's work include Stellar, planetary, and galactic studies (44 papers), Astrophysics and Star Formation Studies (34 papers) and Astronomy and Astrophysical Research (26 papers). R. S. I. Ryans is often cited by papers focused on Stellar, planetary, and galactic studies (44 papers), Astrophysics and Star Formation Studies (34 papers) and Astronomy and Astrophysical Research (26 papers). R. S. I. Ryans collaborates with scholars based in United Kingdom, United States and Spain. R. S. I. Ryans's co-authors include D. J. Lennon, P. L. Dufton, C. J. Evans, S. J. Smartt, F. P. Keenan, P. L. Dufton, C. Trundle, Kenneth R. Sembach, I. Hunter and W. R. J. Rolleston and has published in prestigious journals such as Proceedings of the National Academy of Sciences, The Astrophysical Journal and Monthly Notices of the Royal Astronomical Society.

In The Last Decade

R. S. I. Ryans

56 papers receiving 1.7k 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. S. I. Ryans United Kingdom 20 1.7k 654 115 79 52 58 1.7k
D. Shulyak Germany 24 1.4k 0.9× 425 0.6× 72 0.6× 59 0.7× 28 0.5× 77 1.5k
N. Piskunov Sweden 8 1.4k 0.8× 397 0.6× 112 1.0× 40 0.5× 58 1.1× 11 1.4k
J.‐C. Bouret France 30 2.9k 1.7× 779 1.2× 53 0.5× 117 1.5× 51 1.0× 74 3.0k
N. Ryde Sweden 21 1.2k 0.7× 429 0.7× 67 0.6× 39 0.5× 108 2.1× 81 1.3k
Z. Magic Germany 17 1.3k 0.8× 544 0.8× 68 0.6× 40 0.5× 118 2.3× 24 1.4k
P. de Laverny France 25 1.7k 1.0× 774 1.2× 57 0.5× 61 0.8× 205 3.9× 96 1.8k
Y. Lebreton France 20 1.6k 0.9× 731 1.1× 59 0.5× 64 0.8× 62 1.2× 101 1.6k
V. J. S. Béjar Spain 29 2.4k 1.4× 590 0.9× 56 0.5× 71 0.9× 33 0.6× 101 2.5k
E. Alécian France 29 2.8k 1.7× 469 0.7× 49 0.4× 160 2.0× 67 1.3× 109 2.9k
G. M. Harper United States 20 1.1k 0.7× 223 0.3× 72 0.6× 20 0.3× 60 1.2× 78 1.2k

Countries citing papers authored by R. S. I. Ryans

Since Specialization
Citations

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

Fields of papers citing papers by R. S. I. Ryans

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of R. S. I. Ryans

This figure shows the co-authorship network connecting the top 25 collaborators of R. S. I. Ryans. A scholar is included among the top collaborators of R. S. I. Ryans 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. S. I. Ryans. R. S. I. Ryans 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.
Lennon, D. J., P. L. Dufton, I. Hunter, et al.. (2022). The VLT-FLAMES survey of massive stars. Astronomy and Astrophysics. 665. A180–A180.
2.
Fraser, M., P. L. Dufton, I. Hunter, & R. S. I. Ryans. (2010). Atmospheric parameters and rotational velocities for a sample of Galactic B-type supergiants. Monthly Notices of the Royal Astronomical Society. 34 indexed citations
3.
Brott, I., N. Langer, D. J. Lennon, et al.. (2009). The VLT-FLAMES survey of massive stars: constraints on stellar evolution from the chemical compositions of rapidly rotating Galactic and Magellanic Cloud B-type stars. Astronomy and Astrophysics. 496(3). 841–853. 141 indexed citations
4.
Hunter, I., P. L. Dufton, S. J. Smartt, et al.. (2007). The VLT-FLAMES survey of massive stars: surface chemical compositions of B-type stars in the Magellanic Clouds. Springer Link (Chiba Institute of Technology). 102 indexed citations
5.
Trundle, C., P. L. Dufton, C. J. Evans, et al.. (2007). The VLT-FLAMES survey of massive stars: evolution of surface N abundances and effective temperature scales in the Galaxy and Magellanic Clouds. Astronomy and Astrophysics. 471(2). 625–643. 137 indexed citations
6.
Dufton, P. L., S. J. Smartt, R. S. I. Ryans, et al.. (2006). The VLT-FLAMES survey of massive stars: stellar parameters and rotational velocities in NGC 3293, NGC 4755 and NGC 6611. Astronomy and Astrophysics. 457(1). 265–280. 81 indexed citations
7.
Dufton, P. L., R. S. I. Ryans, S. Simón‐Díaz, C. Trundle, & D. J. Lennon. (2006). B-type supergiants in the Small Magellanic Cloud: rotational velocities and implicationsfor evolutionary models. Astronomy and Astrophysics. 451(2). 603–611. 35 indexed citations
8.
Lennon, D. J., et al.. (2005). A Be star with a low nitrogen abundance in the \nSMC cluster NGC 330. Springer Link (Chiba Institute of Technology). 12 indexed citations
9.
Keenan, F. P., P. L. Dufton, W. R. J. Rolleston, et al.. (2005). High-resolution spectroscopic observations of post-asymptotic giant branch candidates from the Edinburgh-Cape Survey. Monthly Notices of the Royal Astronomical Society. 363(3). 911–917. 4 indexed citations
10.
Rolleston, W. R. J., et al.. (2005). Chemical compositions of four B-type supergiants in the SMC wing. Astronomy and Astrophysics. 429(3). 1025–1030. 30 indexed citations
11.
Hunter, I., P. L. Dufton, R. S. I. Ryans, et al.. (2005). A non-LTE analysis of the spectra of two narrow lined main sequence stars in the SMC. Astronomy and Astrophysics. 436(2). 687–695. 17 indexed citations
12.
Rolleston, W. R. J., F. P. Keenan, P. L. Dufton, et al.. (2004). High-resolution spectroscopy of globular cluster post-Asymptotic Giant Branch stars. Astronomy and Astrophysics. 419(3). 1123–1132. 12 indexed citations
13.
Ryans, R. S. I., P. L. Dufton, W. R. J. Rolleston, et al.. (2003). An analysis of the optical spectra of the post-asymptotic giant branch stars LSIV -12 111 and HD 341617. Astronomy and Astrophysics. 401(3). 1119–1129. 47 indexed citations
14.
Keenan, F. P., L. H. Aller, B. R. Espey, et al.. (2002). Emission lines of [K v ] in the optical spectra of gaseous nebulae. Proceedings of the National Academy of Sciences. 99(7). 4152–4155. 2 indexed citations
15.
Smartt, S. J., et al.. (2002). The evolutionary status of Sher 25 – implications for blue supergiants and the progenitor of SN 1987A. Astronomy and Astrophysics. 391(3). 979–991. 31 indexed citations
16.
Trundle, C., P. L. Dufton, W. R. J. Rolleston, et al.. (2001). A peculiar metal-rich star, HD 135485. Monthly Notices of the Royal Astronomical Society. 328(1). 291–300. 12 indexed citations
17.
Lehner, Nicolas, et al.. (2000). High-resolution optical spectroscopy of the sharp-lined B-type star HD 83206. Monthly Notices of the Royal Astronomical Society. 314(1). 199–208. 6 indexed citations
18.
Ryans, R. S. I., et al.. (1998). CROSS SECTIONS AND RATE COEFFICIENTS FOR EXCITATION OF THE 1s22s2p3PoJ→ 1s22s2p3PoJ′FINE-STRUCTURE TRANSITIONS IN BERYLLIUM-LIKE IONS BY HEAVY PARTICLE IMPACT. Atomic Data and Nuclear Data Tables. 70(2). 179–229. 12 indexed citations
19.
Ryans, R. S. I., et al.. (1997). Optical and H I studies of high- and intermediate-velocity gas towards Complex A. Monthly Notices of the Royal Astronomical Society. 289(4). 986–992. 22 indexed citations
20.
Ryans, R. S. I., et al.. (1997). The distance to Complex M and the Intermediate Velocity Arch. Monthly Notices of the Royal Astronomical Society. 289(1). 83–96. 19 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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