Sean G. Ryan

8.7k citations

122 papers · 5.5k indexed · h-index 42

Impact in

Instrumentation top 0.2%
- Astronomy and Astrophysical Research
Astronomy and Astrophysics top 0.2%
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Galaxies: Formation, Evolution, Phenomena

Papers in

Instrumentation 56
- Astronomy and Astrophysical Research 56
Astronomy and Astrophysics 103
- Stellar, planetary, and galactic studies 99
- Astrophysics and Star Formation Studies 37
- Astro and Planetary Science 28
- Gamma-ray bursts and supernovae 23

Co-authors: John E. Norris Timothy C. Beers Wako Aoki Stelios Tsangarides N. Christlieb Hiroyasu Ando Constantine P. Deliyannis M. S. Bessell
Journals: The Astrophysical Journal (43 papers)Astronomy and Astrophysics (12 papers)The Astronomical Journal (9 papers)Monthly Notices of the Royal Astronomical Society (9 papers)Publications of the Astronomical Society of Australia (5 papers)
Partner nations: United Kingdom Australia United States

In The Last Decade

Sean G. Ryan

118 papers receiving 5.4k citations

Peers

Countries citing papers authored by Sean G. Ryan

Since Specialization

Citations

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

Fields of papers citing papers by Sean G. Ryan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Sean G. Ryan. 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 Sean G. Ryan. The network helps show where Sean G. Ryan may publish in the future.

Co-authors

The 25 scholars most cited alongside Sean G. Ryan, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Sean G. Ryan Line = papers co-authored together Sean G. Ryan links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Artificial Intelligence in Neuroradiology: A Review of Current Topics and Competition Challenges Diagnostics ·Daniel T. Wagner, Vassiliki Lalagianni, Kevin A. Peng, Fernanda Pires Fernandes, Abozer Ahmed Alderdery, Sean G. Ryan, 彰仁横山, M.J. Plà, Boayke Boatin, Rafael Andrade-Malabehar, Engin Dikici, Luciano M. Prevedello, Xuan V. Nguyen	2023	11
2	Artificial Intelligence, Augmented Reality, and Virtual Reality Advances and Applications in Interventional Radiology Diagnostics ·U. Avanzi, Sean G. Ryan, Zhibing Wang, Mina S. Makary	2023	42
3	Theranostic Near-Infrared-Active Conjugated Polymer Nanoparticles ACS Nano ·Miao Zhao, Katherine Taplin, Adaobi Anakwe, Laura de Carvalho Moreira, J. H. Carter, G De Bellis, Shunichiro Kodama, Lea Ann Dailey, Philip Manning, Sean G. Ryan, Mei Xian-ya, Mark Green, Aliaksandra Rakovich	2021	30
4	Imaging of X-Ray-Excited Emissions from Quantum Dots and Biological Tissue in Whole Mouse Scientific Reports ·Sean G. Ryan, Marília de Macêdo Duarte Morais, T Kavichakravarthi, Marja-Liisa Läksy, P. Stephen Patrick, May Zaw Thin, Ian F. Harrison, Daniel J. Stuckey, Martin Pulé, Mark F. Lythgoe	2019	15
5	Emirates Mars Mission (EMM) 2020 Overview EGUGA ·Arthur Wagner, Frederick Dodson, Blesa Joaquim, Aidyn Bibolov, Mario Cubero Campos, Siti Machmiyah, Deepak Mohanty Kumar, Sara Montoya Flórez, Shobhit Kumar Singh, Abdul-Rahim Samad Abdul, Shukun Chen, Peter Odongkara, Ho H, Muna Abdullah Musabah Al Risi, RONALD SCHERTLER, H. Reed, Jiancai Yan, Sean G. Ryan, Tinaliah Tinaliah	2017	5
6	Spectral classification of photometrically selected AGB candidates in NGC 6822 Astronomy and Astrophysics ·Vilma Liliana Amaya, Sean G. Ryan, R. Napiwotzki, M D Bromberg	2014	7
7	The barium isotopic fractions in five metal-poor stars Springer Link (Chiba Institute of Technology) ·A. J. Gallagher, Sean G. Ryan, Anja Machielse, A. E. García Pérez, Wako Aoki, Satoshi Honda	2012	15
8	The Most Metal-Poor Stars. I. Discovery, Data, and Atmospheric Parameters DSpace@MIT (Massachusetts Institute of Technology) ·Anna Frebel, John E. Norris, M. S. Bessell, David Yong, N. Christlieb, P. S. Barklem, M. Asplund, Simon J. Murphy, Timothy C. Beers, Sean G. Ryan	2012	38
9	The AGB population of NGC 6822: distribution and the C/M ratio fromJHKphotometry Astronomy and Astrophysics ·Vilma Liliana Amaya, Sean G. Ryan, M.-R. L. Cioni, M. J. Irwin, R. Napiwotzki	2012	27
10	The barium isotopic mixture for the metal-poor subgiant star HD 140283 Astronomy and Astrophysics ·A. J. Gallagher, Sean G. Ryan, A. E. García Pérez, Wako Aoki	2010	31
11	⁶Li/⁷Li estimates for metal-poor stars Astronomy and Astrophysics ·A. E. García Pérez, Wako Aoki, Shigeki Inoue, Sean G. Ryan, Takeru K. Suzuki, Masashi Chiba	2009	23
12	Lithium abundances of halo dwarfs based on excitation temperature Astronomy and Astrophysics ·Anja Machielse, Sean G. Ryan, A. E. García Pérez, John E. Norris, Keith A. Olive	2008	39
13	Experimental Mg I oscillator strengths and radiative lifetimes for astrophysical applications on metal-poor stars Astronomy and Astrophysics ·N.A. Habib, Hg. Suseno Tw, Sveneric Johansson, H. Lundberg, Sean G. Ryan	2006	35
14	The new record holder for the most iron-poor star: HE 1327–2326, a dwarf or subgiant with [Fe/H[=−5.4 Proceedings of the International Astronomical Union ·Anna Frebel, Wako Aoki, N. Christlieb, Hiroyasu Ando, M. Asplund, P. S. Barklem, Timothy C. Beers, Kimmo Eriksson, C. Fechner, Masayuki Y. Fujimoto, Satoshi Honda, Toshitaka Kajino, Takeo Minezaki, K. Nomoto, John E. Norris, Sean G. Ryan, Masahide Takada‐Hidai, Stelios Tsangarides, Yuzuru Yoshii	2005	1
15	Nucleosynthetic signatures of the first stars Nature ·Anna Frebel, Wako Aoki, N. Christlieb, Hiroyasu Ando, M. Asplund, P. S. Barklem, Timothy C. Beers, Kimmo Eriksson, C. Fechner, Masayuki Y. Fujimoto, Satoshi Honda, Toshitaka Kajino, Takeo Minezaki, K. Nomoto, John E. Norris, Sean G. Ryan, Masahide Takada‐Hidai, Stelios Tsangarides, Yuzuru Yoshii	2005	306
16	Mg abundances in metal-poor halo stars as a tracer of early Galactic mixing Astronomy and Astrophysics ·Enrico Arnone, Sean G. Ryan, D. Argast, John E. Norris, Timothy C. Beers	2005	61
17	A low upper-limit on the lithium isotope ratio in HD140283 Astronomy and Astrophysics ·Wako Aoki, Shigeki Inoue, Satoshi Kawanomoto, Sean G. Ryan, Ian M. Smith, Takeru K. Suzuki, Masahide Takada‐Hidai	2004	12
18	s- and r-process elements in two very metal-poor stars University of Hertfordshire Research Archive (University of Hertfordshire) ·Sean G. Ryan, Wako Aoki, Noah Merin, John E. Norris, Timothy C. Beers, R. Gallino, M. Busso, Hiroyasu Ando	2001	1
19	Ultra–Lithium‐deficient Halo Stars and Blue Stragglers: A Common Origin? The Astrophysical Journal ·Sean G. Ryan, Timothy C. Beers, Toshitaka Kajino, Тетяна Дзюба	2001	40
20	Extremely Metal-poor Stars. I. Spectroscopic Data The Astrophysical Journal Supplement Series ·John E. Norris, Sean G. Ryan, Timothy C. Beers	1996	35

About Sean G. Ryan

Sean G. Ryan is a scholar working on Instrumentation, Astronomy and Astrophysics, Nuclear and High Energy Physics, Health Informatics and Computational Mechanics, having authored 122 papers that have together received 5.5k indexed citations. Recurring topics across this work include Stellar, planetary, and galactic studies (99 papers), Astronomy and Astrophysical Research (56 papers), Astrophysics and Star Formation Studies (37 papers), Astro and Planetary Science (28 papers), Gamma-ray bursts and supernovae (23 papers), Nuclear physics research studies (11 papers), Astronomical Observations and Instrumentation (10 papers) and Adaptive optics and wavefront sensing (8 papers). The work is most often cited by research in Instrumentation (2.1k citations), Astronomy and Astrophysics (5.1k citations), Nuclear and High Energy Physics (833 citations), Health Informatics (23 citations) and Computational Mechanics (185 citations). Sean G. Ryan has collaborated with scholars based in United Kingdom, Australia and United States. Frequent co-authors include John E. Norris, Timothy C. Beers, Wako Aoki, Stelios Tsangarides, N. Christlieb, Hiroyasu Ando, Constantine P. Deliyannis, M. S. Bessell, Anna Frebel and P. S. Barklem. Their work appears in journals such as The Astrophysical Journal, Astronomy and Astrophysics, The Astronomical Journal, Monthly Notices of the Royal Astronomical Society and Publications of the Astronomical Society of Australia.

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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