J. Llama

758 total citations
15 papers, 391 citations indexed

About

J. Llama is a scholar working on Astronomy and Astrophysics, Instrumentation and Oceanography. According to data from OpenAlex, J. Llama has authored 15 papers receiving a total of 391 indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Astronomy and Astrophysics, 3 papers in Instrumentation and 1 paper in Oceanography. Recurrent topics in J. Llama's work include Stellar, planetary, and galactic studies (13 papers), Astro and Planetary Science (8 papers) and Astrophysics and Star Formation Studies (6 papers). J. Llama is often cited by papers focused on Stellar, planetary, and galactic studies (13 papers), Astro and Planetary Science (8 papers) and Astrophysics and Star Formation Studies (6 papers). J. Llama collaborates with scholars based in United States, United Kingdom and Switzerland. J. Llama's co-authors include R. Farès, M. Jardine, A. A. Vidotto, C. Moutou, A. F. Lanza, Evgenya L. Shkolnik, Ch. Helling, V. Bourrier, P. J. Wheatley and T. I. Gombosi and has published in prestigious journals such as The Astrophysical Journal, Monthly Notices of the Royal Astronomical Society and The Astrophysical Journal Supplement Series.

In The Last Decade

J. Llama

14 papers receiving 358 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
J. Llama United States 10 346 103 23 22 21 15 391
A. Mazumdar India 15 619 1.8× 290 2.8× 15 0.7× 13 0.6× 23 1.1× 28 649
A. Ortiz‐Gil Spain 9 577 1.7× 195 1.9× 12 0.5× 19 0.9× 10 0.5× 20 599
V. E. Margoniner United States 11 446 1.3× 218 2.1× 13 0.6× 35 1.6× 5 0.2× 19 470
Louis J. Rubbo United States 8 276 0.8× 6 0.1× 59 2.6× 25 1.1× 4 0.2× 13 374
S A Walker United States 19 829 2.4× 153 1.5× 22 1.0× 28 1.3× 54 899
Christopher D. Impey United States 9 440 1.3× 201 2.0× 4 0.2× 13 0.6× 2 0.1× 13 459
J. Veljanoski United Kingdom 13 511 1.5× 268 2.6× 2 0.1× 4 0.2× 11 0.5× 17 537
Maarten A. Breddels Netherlands 6 302 0.9× 133 1.3× 2 0.1× 8 0.4× 4 0.2× 10 325
F. Ruppin United States 9 295 0.9× 83 0.8× 28 1.3× 14 0.7× 21 373
Antonio Ragagnin Italy 13 314 0.9× 151 1.5× 13 0.6× 20 1.0× 26 357

Countries citing papers authored by J. Llama

Since Specialization
Citations

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

Fields of papers citing papers by J. Llama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of J. Llama

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

All Works

15 of 15 papers shown
1.
Sikora, James, Jason F. Rowe, Saugata Barat, et al.. (2025). Seasonal Changes in the Atmosphere of HD 80606 b Observed with JWST’s NIRSpec/G395H. The Astronomical Journal. 170(2). 105–105. 2 indexed citations
2.
Shkolnik, Evgenya L., et al.. (2025). Stringent Limits on H 3 + Emission from the Hot Jupiters WASP-80b and WASP-69b. The Astronomical Journal. 169(6). 327–327. 2 indexed citations
3.
Barnes, J. R., Matthew R. Standing, C. A. Haswell, et al.. (2023). DMPP-4: candidate sub-Neptune mass planets orbiting a naked-eye star. Monthly Notices of the Royal Astronomical Society. 524(4). 5196–5212. 5 indexed citations
4.
Strugarek, Antoine, R. Farès, V. Bourrier, et al.. (2022). MOVES – V. Modelling star–planet magnetic interactions of HD 189733. Monthly Notices of the Royal Astronomical Society. 512(3). 4556–4572. 11 indexed citations
5.
Ramiaramanantsoa, Tahina, Judd D. Bowman, Evgenya L. Shkolnik, et al.. (2021). An Automated Onboard Image Integration Control for the Star-Planet Activity Research CubeSat. American Astronomical Society Meeting Abstracts. 53(1).
6.
Bourrier, V., P. J. Wheatley, A. Lecavelier des Étangs, et al.. (2020). MOVES III. Simultaneous X-ray and ultraviolet observations unveiling the variable environment of the hot Jupiter HD 189733b. Monthly Notices of the Royal Astronomical Society. 493(1). 559–579. 28 indexed citations
7.
Mommert, Michael, et al.. (2019). Asteroid Photometry from the Transiting Exoplanet Survey Satellite: A Pilot Study. The Astrophysical Journal Supplement Series. 245(2). 29–29. 6 indexed citations
8.
Vidotto, A. A., V. Bourrier, R. Farès, et al.. (2019). MOVES – II. Tuning in to the radio environment of HD189733b. Monthly Notices of the Royal Astronomical Society. 485(4). 4529–4538. 28 indexed citations
9.
Farès, R., V. Bourrier, A. A. Vidotto, et al.. (2017). MOVES – I. The evolving magnetic field of the planet-hosting star HD189733. Monthly Notices of the Royal Astronomical Society. 471(1). 1246–1257. 31 indexed citations
10.
Haywood, R. D., A. Collier Cameron, Y. C. Unruh, et al.. (2016). The Sun as a planet-host star: proxies fromSDOimages for HARPS radial-velocity variations. Monthly Notices of the Royal Astronomical Society. 457(4). 3637–3651. 89 indexed citations
11.
Llama, J. & Evgenya L. Shkolnik. (2015). TRANSITING THE SUN: THE IMPACT OF STELLAR ACTIVITY ON X-RAY AND ULTRAVIOLET TRANSITS. The Astrophysical Journal. 802(1). 41–41. 20 indexed citations
12.
Aigrain, S., J. Llama, T. Ceillier, et al.. (2015). Testing the recovery of stellar rotation signals from Kepler light curves using a blind hare-and-hounds exercise. Monthly Notices of the Royal Astronomical Society. 450(3). 3211–3226. 73 indexed citations
13.
Llama, J., A. A. Vidotto, M. Jardine, et al.. (2013). Exoplanet transit variability: bow shocks and winds around HD 189733b. Monthly Notices of the Royal Astronomical Society. 436(3). 2179–2187. 50 indexed citations
14.
Llama, J., M. Jardine, D. H. Mackay, & R. Farès. (2012). Using Kepler transit observations to measure stellar spot belt migration rates. Monthly Notices of the Royal Astronomical Society Letters. 422(1). L72–L76. 14 indexed citations
15.
Kohnle, Antje, Donatella Cassettari, C. Hooley, et al.. (2012). A new multimedia resource for teaching quantum mechanics concepts. American Journal of Physics. 80(2). 148–153. 32 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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2026