Zdeněk Kopal

2.9k total citations · 1 hit paper
92 papers, 1.5k citations indexed

About

Zdeněk Kopal is a scholar working on Astronomy and Astrophysics, Aerospace Engineering and Geophysics. According to data from OpenAlex, Zdeněk Kopal has authored 92 papers receiving a total of 1.5k indexed citations (citations by other indexed papers that have themselves been cited), including 64 papers in Astronomy and Astrophysics, 10 papers in Aerospace Engineering and 8 papers in Geophysics. Recurrent topics in Zdeněk Kopal's work include Astro and Planetary Science (26 papers), Planetary Science and Exploration (22 papers) and Stellar, planetary, and galactic studies (15 papers). Zdeněk Kopal is often cited by papers focused on Astro and Planetary Science (26 papers), Planetary Science and Exploration (22 papers) and Stellar, planetary, and galactic studies (15 papers). Zdeněk Kopal collaborates with scholars based in United Kingdom, United States and Australia. Zdeněk Kopal's co-authors include J. Rahe, Felix Haas, E. S. Page, Otto Struve, L. G. Jacchia, R. A. Lyttleton, Peter G. Bergmann, Patrick Moore, D. W. Strangway and Arthur Beer and has published in prestigious journals such as Nature, Proceedings of the National Academy of Sciences and The Astrophysical Journal.

In The Last Decade

Zdeněk Kopal

78 papers receiving 1.3k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Close binary systems

1959 460 citations Zdeněk Kopal Medical Entomology and Zoology profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Zdeněk Kopal United Kingdom	16	1.3k	287	140	139	127	92	1.5k
S. Sofia United States	31	2.6k 2.0×	308 1.1×	163 1.2×	55 0.4×	190 1.5×	126	2.8k
K. H. Prendergast United States	16	729 0.6×	150 0.5×	393 2.8×	39 0.3×	59 0.5×	52	1.2k
Jean-Paul Zahn France	27	2.3k 1.8×	298 1.0×	330 2.4×	61 0.4×	130 1.0×	102	2.7k
Yoshihide Kozai Japan	15	2.4k 1.9×	180 0.6×	33 0.2×	92 0.7×	266 2.1×	70	2.6k
R. F. Stein United States	28	2.8k 2.2×	236 0.8×	220 1.6×	51 0.4×	134 1.1×	83	2.9k
Alfred Weigert Germany	4	1.6k 1.3×	255 0.9×	101 0.7×	84 0.6×	109 0.9×	20	1.8k
A. E. Wright Australia	25	1.9k 1.5×	307 1.1×	147 1.1×	106 0.8×	53 0.4×	94	2.1k
W. J. Cocke United States	15	577 0.5×	70 0.2×	101 0.7×	67 0.5×	60 0.5×	73	803
H. M. Antia India	29	2.4k 1.9×	221 0.8×	82 0.6×	102 0.7×	153 1.2×	132	2.7k
P. C. Gregory Canada	24	2.0k 1.6×	177 0.6×	101 0.7×	89 0.6×	62 0.5×	69	2.1k

Countries citing papers authored by Zdeněk Kopal

Since Specialization

Citations

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

Fields of papers citing papers by Zdeněk Kopal

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Zdeněk Kopal

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

1.

Fälthammar, Carl‐Gunne, Gustaf Arrhenius, Bibhas R. De, et al.. (1988). Plasma and the Universe. CERN Document Server (European Organization for Nuclear Research). 1 indexed citations

2.

Kopal, Zdeněk, et al.. (1984). Double stars, physical properties, and generic relations : proceedings of IAU Colloquium no. 80, held at Lembang, Java, 3-7 June 1983. Astrophysics and Space Science. 99(80).

3.

Kopal, Zdeněk, et al.. (1984). Double Stars, Physical Properties and Generic Relations. CERN Document Server (European Organization for Nuclear Research). 2 indexed citations

4.

Kopal, Zdeněk & F. D. Kahn. (1981). Investigating the universe : papers presented to Zdeněk Kopal on the occasion of his retirement, September 1981. 1 indexed citations

5.

Kopal, Zdeněk, et al.. (1981). Photometric and Spectroscopic Binary Systems. CERN Document Server (European Organization for Nuclear Research). 147 indexed citations

6.

Kopal, Zdeněk. (1978). Dynamics of Close Binary Systems. Astrophysics and space science library. 249 indexed citations

7.

Kopal, Zdeněk & D. W. Strangway. (1972). Lunar geophysics; proceedings of a conference at the Lunar Science Institute, Houston, Texas 18-21 October 1971.. 1 indexed citations

8.

Kopal, Zdeněk. (1966). An Introduction to the Study of the Moon. Astrophysics and space science library. 55 indexed citations

9.

Kopal, Zdeněk. (1965). Effects of thermal expansion on the moments of inertia of the moon. Icarus. 4(2). 166–172. 2 indexed citations

10.

Kopal, Zdeněk. (1965). Dr. Antonín Bečvář. Nature. 206(4983). 449–449. 1 indexed citations

11.

Kopal, Zdeněk. (1965). The Luminescence of the Moon. Scientific American. 212(5). 28–37. 2 indexed citations

12.

Kopal, Zdeněk, et al.. (1964). Lunar Luminescence and Solar Flares. S&T. 27. 140. 4 indexed citations

13.

Kopal, Zdeněk & R. A. Lyttleton. (1962). On the elliptic case of the restricted problem of three bodies and the remote history of the Earth-Moon system. Icarus. 1(1-6). 455–458. 10 indexed citations

14.

Kopal, Zdeněk. (1960). Figures of equilibrium of celestial bodies : with emphasis on problems of motion of artificial satellites. University of Wisconsin Press eBooks. 18 indexed citations

15.

Kopal, Zdeněk. (1959). Close binary systems. Medical Entomology and Zoology. 460 indexed citations breakdown →

16.

Kopal, Zdeněk. (1956). On the nature of physical processes underlying the nova phenomenon. Vistas in Astronomy. 2. 1491–1505. 1 indexed citations

17.

Kopal, Zdeněk. (1956). Physics of the Sun. British Journal of Applied Physics. 7(4). 119–128. 1 indexed citations

18.

Kopal, Zdeněk. (1955). The classification of close binary systems. 18. 379. 10 indexed citations

19.

Beer, Arthur & Zdeněk Kopal. (1954). The spectrum of the secondary component of the Algol system. 17(23). 443. 1 indexed citations

20.

Kopal, Zdeněk. (1954). The Propagation of Shock Waves in Self-Gravitating Gas Spheres.. The Astrophysical Journal. 120. 159–159. 15 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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