Ewan O’Sullivan

3.9k total citations · 1 hit paper
90 papers, 1.9k citations indexed

About

Ewan O’Sullivan is a scholar working on Astronomy and Astrophysics, Nuclear and High Energy Physics and Instrumentation. According to data from OpenAlex, Ewan O’Sullivan has authored 90 papers receiving a total of 1.9k indexed citations (citations by other indexed papers that have themselves been cited), including 82 papers in Astronomy and Astrophysics, 32 papers in Nuclear and High Energy Physics and 17 papers in Instrumentation. Recurrent topics in Ewan O’Sullivan's work include Galaxies: Formation, Evolution, Phenomena (74 papers), Astrophysical Phenomena and Observations (43 papers) and Astrophysics and Cosmic Phenomena (30 papers). Ewan O’Sullivan is often cited by papers focused on Galaxies: Formation, Evolution, Phenomena (74 papers), Astrophysical Phenomena and Observations (43 papers) and Astrophysics and Cosmic Phenomena (30 papers). Ewan O’Sullivan collaborates with scholars based in United States, United Kingdom and Italy. Ewan O’Sullivan's co-authors include T. J. Ponman, J. M. Vrtilek, S. Giacintucci, Somak Raychaudhury, Duncan A. Forbes, Arif Babul, Laurence P. David, Aaron J. Romanowsky, Andy Sanderson and Charlie Conroy and has published in prestigious journals such as Nature, The Astrophysical Journal and Monthly Notices of the Royal Astronomical Society.

In The Last Decade

Ewan O’Sullivan

81 papers receiving 1.8k citations

Hit Papers

A galaxy lacking dark matter 2018 2026 2020 2023 2018 50 100 150 200
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.

  1. A galaxy lacking dark matter
    2018 239 citations Pieter van Dokkum, Shany Danieli et al. profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ewan O’Sullivan United States 24 1.9k 605 476 70 57 90 1.9k
Molly S. Peeples United States 18 1.9k 1.0× 551 0.9× 487 1.0× 108 1.5× 46 0.8× 37 2.0k
Sijing Shen United States 27 2.5k 1.3× 912 1.5× 535 1.1× 94 1.3× 59 1.0× 51 2.6k
Andrea Lapi Italy 25 2.0k 1.1× 714 1.2× 481 1.0× 41 0.6× 77 1.4× 140 2.0k
Ben Keller Canada 24 1.7k 0.9× 670 1.1× 353 0.7× 51 0.7× 54 0.9× 47 1.8k
Gergö Popping Germany 25 1.7k 0.9× 738 1.2× 221 0.5× 50 0.7× 73 1.3× 69 1.8k
A. Verma United Kingdom 26 2.2k 1.2× 813 1.3× 238 0.5× 53 0.8× 93 1.6× 47 2.2k
L. Dunne United Kingdom 29 2.8k 1.5× 690 1.1× 680 1.4× 45 0.6× 57 1.0× 77 2.8k
Robert P. C. Wiersma Netherlands 12 1.6k 0.8× 685 1.1× 294 0.6× 44 0.6× 32 0.6× 14 1.6k
Freeke van de Voort United Kingdom 22 1.5k 0.8× 519 0.9× 334 0.7× 69 1.0× 30 0.5× 47 1.5k
S. Juneau United States 26 2.2k 1.2× 1.2k 2.0× 213 0.4× 59 0.8× 70 1.2× 46 2.3k

Countries citing papers authored by Ewan O’Sullivan

Since Specialization
Citations

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

Fields of papers citing papers by Ewan O’Sullivan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ewan O’Sullivan. 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 Ewan O’Sullivan. The network helps show where Ewan O’Sullivan may publish in the future.

Co-authorship network of co-authors of Ewan O’Sullivan

This figure shows the co-authorship network connecting the top 25 collaborators of Ewan O’Sullivan. A scholar is included among the top collaborators of Ewan O’Sullivan 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 Ewan O’Sullivan. Ewan O’Sullivan 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.
Seppi, R., D. Eckert, A. Finoguenov, et al.. (2025). Modelling the selection of galaxy groups with end-to-end simulations. Astronomy and Astrophysics. 699. A206–A206.
2.
O’Sullivan, Ewan, P. N. Appleton, Bhavin Joshi, et al.. (2025). HCG 57: Evidence for Shock-heated Intergalactic Gas from X-Rays and Optical Emission Line Spectroscopy. The Astrophysical Journal. 979(2). 240–240.
3.
Gitti, Myriam, Fabrizio Brighenti, T. Pasini, et al.. (2024). Deep Chandra Observations of A2495: A Possible Sloshing-regulated Feedback Cycle in a Triple-offset Galaxy Cluster. The Astrophysical Journal. 963(1). 8–8. 2 indexed citations
4.
Kwon, Hyeong‐Ahn, Gonzalo González Abad, Christopher Chan Miller, et al.. (2024). Updated OMI Glyoxal Column Measurements Using Collection 4 Level 1B Radiances. Earth and Space Science. 11(9). 1 indexed citations
5.
Bak, Juseon, Xiong Liu, Kai Yang, et al.. (2024). An improved OMI ozone profile research product version 2.0 with collection 4 L1b data and algorithm updates. Atmospheric measurement techniques. 17(7). 1891–1911. 4 indexed citations
6.
Kim, Dong‐Woo, et al.. (2023). Revisiting X-Ray-bright Optically Normal Galaxies with the Chandra Source Catalog. The Astrophysical Journal. 955(1). 56–56.
7.
Nowlan, Caroline R., Gonzalo González Abad, Hyeong‐Ahn Kwon, et al.. (2023). Global Formaldehyde Products From the Ozone Mapping and Profiler Suite (OMPS) Nadir Mappers on Suomi NPP and NOAA‐20. Earth and Space Science. 10(5). 14 indexed citations
8.
Kim, Dong‐Woo, et al.. (2023). The Chandra Source Catalog Normal Galaxy Sample. The Astrophysical Journal Supplement Series. 268(1). 17–17. 2 indexed citations
9.
Appleton, P. N., P. Guillard, Bjorn Emonts, et al.. (2023). Multiphase Gas Interactions on Subarcsec Scales in the Shocked Intergalactic Medium of Stephan’s Quintet with JWST and ALMA. The Astrophysical Journal. 951(2). 104–104. 16 indexed citations
10.
O’Sullivan, Ewan, et al.. (2022). The contribution of non-central radio galaxies to AGN feedback in rich galaxy clusters. arXiv (Cornell University). 4 indexed citations
11.
Sun, Kang, Christopher Chan Miller, K. Chance, et al.. (2022). An optimal estimation-based retrieval of upper atmospheric oxygen airglow and temperature from SCIAMACHY limb observations. Atmospheric measurement techniques. 15(12). 3721–3745. 5 indexed citations
12.
Kolokythas, Konstantinos, Ewan O’Sullivan, S. I. Loubser, et al.. (2021). The Complete Local-Volume Groups Sample – IV. Star formation and gas content in group-dominant galaxies. Monthly Notices of the Royal Astronomical Society. 510(3). 4191–4207. 13 indexed citations
13.
Pasini, T., Myriam Gitti, Fabrizio Brighenti, et al.. (2021). A first Chandra view of the cool core cluster A1668: offset cooling and AGN feedback cycle. arXiv (Cornell University). 7 indexed citations
14.
Pasini, T., M. Brüggen, F. de Gasperin, et al.. (2020). The relation between the diffuse X-ray luminosity and the radio power of the central AGN in galaxy groups. Monthly Notices of the Royal Astronomical Society. 497(2). 2163–2174. 10 indexed citations
15.
Kim, Dong‐Woo, A. Paggi, Ewan O’Sullivan, et al.. (2019). Temperature profiles of hot gas in early-type galaxies. Monthly Notices of the Royal Astronomical Society. 492(2). 2095–2118. 5 indexed citations
16.
Dokkum, Pieter van, Yotam Cohen, Shany Danieli, et al.. (2018). An Enigmatic Population of Luminous Globular Clusters in a Galaxy Lacking Dark Matter. The Astrophysical Journal Letters. 856(2). L30–L30. 65 indexed citations
17.
O’Sullivan, Ewan, F. Combes, P. Salomé, et al.. (2018). Cold gas in a complete sample of group-dominant early-type galaxies. Springer Link (Chiba Institute of Technology). 27 indexed citations
18.
Kim, Dong‐Woo, C. S. Anderson, D. J. Burke, et al.. (2018). Disturbed Fossil Group Galaxy NGC 1132. The Astrophysical Journal. 853(2). 129–129. 6 indexed citations
19.
O’Sullivan, Ewan, T. J. Ponman, Konstantinos Kolokythas, et al.. (2017). The Complete Local Volume Groups Sample – I. Sample selection and X-ray properties of the high-richness subsample. Monthly Notices of the Royal Astronomical Society. 472(2). 1482–1505. 56 indexed citations
20.
Giacintucci, S., Ewan O’Sullivan, J. M. Vrtilek, et al.. (2009). Energy injection in AWM4: a cool corona, a strong radio source, and missing X-ray cavities. 108. 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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