This map shows the geographic impact of C. J. Zeippen'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 C. J. Zeippen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites C. J. Zeippen more than expected).
This network shows the impact of papers produced by C. J. Zeippen. 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 C. J. Zeippen. The network helps show where C. J. Zeippen may publish in the future.
Co-authorship network of co-authors of C. J. Zeippen
This figure shows the co-authorship network connecting the top 25 collaborators of C. J. Zeippen.
A scholar is included among the top collaborators of C. J. Zeippen 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 C. J. Zeippen. C. J. Zeippen is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Storey, P. J., C. J. Zeippen, & M. Le Dourneuf. (2002). Atomic data from the IRON Project. Astronomy and Astrophysics. 394(2). 753–762.36 indexed citations
7.
Mendoza, C., et al.. (2001). TIPTOPbase: the Iron Project and the Opacity Project Atomic Database. 46.1 indexed citations
8.
Butler, K. & C. J. Zeippen. (2001). Atomic data from the IRON Project. Astronomy and Astrophysics. 372(3). 1083–1087.13 indexed citations
9.
Butler, K. & C. J. Zeippen. (2001). Atomic data from the IRON Project. Astronomy and Astrophysics. 372(3). 1078–1082.11 indexed citations
10.
Butler, K. & C. J. Zeippen. (2000). Atomic data from the IRON Project. Astronomy and Astrophysics Supplement Series. 143(3). 483–489.15 indexed citations
11.
Mendoza, C., et al.. (1995). Atomic data from the IRON Project. X. Effective collision strengths for infrared transitions in silicon- and sulphur-like ions.. 111. 347.1 indexed citations
12.
Biémont, Émile, J E Hansen, P. Quinet, & C. J. Zeippen. (1995). Forbidden transitions of astrophysical interest in the 5pk (k=1-5) configurations. UvA-DARE (University of Amsterdam). 111. 333–346.24 indexed citations
13.
Butler, K. & C. J. Zeippen. (1994). Atomic data from the IRON Project. V. Effective collision strengths for transitions in the ground configuration of oxygen-like ions.. Astronomy & Astrophysics Supplement Series. 108. 1–8.5 indexed citations
14.
Biémont, Émile, P. Quinet, & C. J. Zeippen. (1993). n < 2 Allowed Transitions in Neutral Sulfur within in the Visible and Infrared Spectral Ranges. Open Repository and Bibliography (University of Liège). 102(2). 435–449.5 indexed citations
15.
Biémont, Émile & C. J. Zeippen. (1992). Electric Dipole Transitions in Atomic Oxygen and the lifetimes of the 2p3(4S°)3s5S° and 3S° States. ORBi (University of Liège).15 indexed citations
Sahal−Bréchot, S., W. L. Wiese, Peter L. Smith, et al.. (1991). Commission 14: Atomic and Molecular data. Transactions of the International Astronomical Union. 21(2). 173–190.1 indexed citations
18.
Arpigny, C., et al.. (1987). On the interpretation of the CH cometary spectrum. Open Repository and Bibliography (University of Liège).5 indexed citations
19.
Butler, K. & C. J. Zeippen. (1984). N I forbidden lines revisited. A&A. 141(1). 274–278.7 indexed citations
20.
Eidelsberg, M., et al.. (1981). Forbidden Lines in Hot Astronomical Sources. Astronomy & Astrophysics Supplement Series. 43. 455.14 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.