J. E. Penfold

1.2k total citations
14 papers, 162 citations indexed

About

J. E. Penfold is a scholar working on Astronomy and Astrophysics, Computational Mechanics and Instrumentation. According to data from OpenAlex, J. E. Penfold has authored 14 papers receiving a total of 162 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Astronomy and Astrophysics, 8 papers in Computational Mechanics and 7 papers in Instrumentation. Recurrent topics in J. E. Penfold's work include Astronomical Observations and Instrumentation (8 papers), Astronomy and Astrophysical Research (7 papers) and Stellar, planetary, and galactic studies (7 papers). J. E. Penfold is often cited by papers focused on Astronomical Observations and Instrumentation (8 papers), Astronomy and Astrophysical Research (7 papers) and Stellar, planetary, and galactic studies (7 papers). J. E. Penfold collaborates with scholars based in South Africa, United States and Serbia. J. E. Penfold's co-authors include A. P. Cowley, D. Crampton, Ronald A. Remillard, J. B. Hutchings, R. W. Hilditch, D. Kilkenny, P. R. Warren, R. Nelson, D. Terrell and Josef Kallrath and has published in prestigious journals such as The Astrophysical Journal, Monthly Notices of the Royal Astronomical Society and The Astronomical Journal.

In The Last Decade

J. E. Penfold

13 papers receiving 154 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
J. E. Penfold South Africa	7	157	32	25	24	15	14	162
Yoshihiro Ueda Japan	7	247 1.6×	21 0.7×	96 3.8×	30 1.3×	6 0.4×	19	261
Enrico J. Kotze South Africa	8	194 1.2×	29 0.9×	30 1.2×	27 1.1×	16 1.1×	13	198
A. Merloni Germany	5	219 1.4×	27 0.8×	79 3.2×	15 0.6×	8 0.5×	6	224
Niel Brandt United States	3	217 1.4×	8 0.3×	48 1.9×	12 0.5×	5 0.3×	7	220
A. Kuznetsov Russia	7	112 0.7×	6 0.2×	25 1.0×	8 0.3×	7 0.5×	19	120
Peter Nelson Australia	8	144 0.9×	7 0.2×	23 0.9×	9 0.4×	16 1.1×	16	146
D. Kunneriath Czechia	6	260 1.7×	37 1.2×	62 2.5×	12 0.5×	7 0.5×	12	262
L. E. Rivera Sandoval United States	9	221 1.4×	35 1.1×	35 1.4×	9 0.4×	15 1.0×	24	233
Amy Secunda United States	7	256 1.6×	18 0.6×	36 1.4×	15 0.6×	6 0.4×	12	277
J. P. de Cuyper Belgium	6	105 0.7×	21 0.7×	6 0.2×	3 0.1×	14 0.9×	9	117

Countries citing papers authored by J. E. Penfold

Since Specialization

Citations

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

Fields of papers citing papers by J. E. Penfold

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J. E. Penfold. 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 J. E. Penfold. The network helps show where J. E. Penfold may publish in the future.

Co-authorship network of co-authors of J. E. Penfold

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

All Works

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14 of 14 papers shown

Nelson, R., et al.. (1995). Observations and Analysis of the Field Contact Binary V728 Herculis. The Astronomical Journal. 110. 2400–2400. 21 indexed citations

Nelson, Robert W., E. F. Milone, & J. E. Penfold. (1988). The Short-Period Eclipsing Binary V728 Herculis. IBVS. 3201. 1. 2 indexed citations

Cowley, A. P., D. Crampton, J. B. Hutchings, Ronald A. Remillard, & J. E. Penfold. (1983). Discovery of a massive unseen star in LMC X-3. The Astrophysical Journal. 272. 118–118. 73 indexed citations

Kilkenny, D., P. W. Hill, & J. E. Penfold. (1981). LB 3459, an O-type subdwarf eclipsing binary system - III. Radial velocity curve and orbital solutions. Monthly Notices of the Royal Astronomical Society. 194(2). 429–437. 7 indexed citations

Kilkenny, D., J. E. Penfold, & R. W. Hilditch. (1979). LB 3459, an O-type subdwarf eclipsing binary system - II. New photometry and an improved analysis. Monthly Notices of the Royal Astronomical Society. 187(1). 1–7. 10 indexed citations

Penfold, J. E.. (1979). UBV observations of Seyfert and emission-line galaxies. Monthly Notices of the Royal Astronomical Society. 186(2). 297–304. 7 indexed citations

Penfold, J. E., et al.. (1978). Spectroscopic and photometric observations of three compact galaxies. Monthly Notices of the Royal Astronomical Society. 184(1). 15P–20P. 3 indexed citations

Kilkenny, D., R. W. Hilditch, & J. E. Penfold. (1978). LB 3459, a short-period eclipsing binary system containing two O-type subdwarfs. Monthly Notices of the Royal Astronomical Society. 183(3). 523–531. 19 indexed citations

Penfold, J. E.. (1975). Two-colour observations of RR Lyrae variables. Observatory. 95. 44–50.

10.

Penny, A. J., J. E. Penfold, & L. A. Balona. (1975). The Spectroscopic Binary System HD 158320 ( = 3U 1727 - 33?). Monthly Notices of the Royal Astronomical Society. 171(2). 387–393. 2 indexed citations

11.

Warren, P. R. & J. E. Penfold. (1975). Photometry of LMC X-ray Candidates. Monthly Notices of the Royal Astronomical Society. 172(1). 41P–47P. 9 indexed citations

12.

Penfold, J. E., et al.. (1975). Photometry of SK160 = SMC-X1. Monthly Notices of the Royal Astronomical Society. 171(2). 445–455. 3 indexed citations

13.

Penny, A. J., R. P. Olowin, J. E. Penfold, & P. R. Warren. (1973). Photometry of HD 153919 = 2U 1700-37. Monthly Notices of the Royal Astronomical Society. 163(1). 7P–12P. 5 indexed citations

14.

Penfold, J. E.. (1971). Radial Velocity Observations of the Delta Scuti Star 20 Canum Venaticorum. Publications of the Astronomical Society of the Pacific. 83. 497–497. 1 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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