Ian U. Roederer

4.3k total citations · 1 hit paper
89 papers, 2.2k citations indexed

About

Ian U. Roederer is a scholar working on Astronomy and Astrophysics, Instrumentation and Nuclear and High Energy Physics. According to data from OpenAlex, Ian U. Roederer has authored 89 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 81 papers in Astronomy and Astrophysics, 27 papers in Instrumentation and 24 papers in Nuclear and High Energy Physics. Recurrent topics in Ian U. Roederer's work include Stellar, planetary, and galactic studies (75 papers), Astrophysics and Star Formation Studies (34 papers) and Gamma-ray bursts and supernovae (30 papers). Ian U. Roederer is often cited by papers focused on Stellar, planetary, and galactic studies (75 papers), Astrophysics and Star Formation Studies (34 papers) and Gamma-ray bursts and supernovae (30 papers). Ian U. Roederer collaborates with scholars based in United States, Australia and Brazil. Ian U. Roederer's co-authors include C. Sneden, Anna Frebel, J. J. Cowan, Stephen A. Shectman, J. E. Lawler, Vinicius M. Placco, Timothy C. Beers, George W. Preston, Ian B. Thompson and Greg Burley and has published in prestigious journals such as Nature, Science and The Astrophysical Journal.

In The Last Decade

Ian U. Roederer

80 papers receiving 2.1k citations

Hit Papers

align trajectories

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.

A SEARCH FOR STARS OF VERY LOW METAL ABUNDANCE. VI. DETAILED ABUNDANCES OF 313 METAL-POOR STARS

2014 286 citations Ian U. Roederer, C. Sneden et al. The Astronomical Journal profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Ian U. Roederer United States	27	2.1k	785	417	109	58	89	2.2k
É. Depagne United States	24	2.9k 1.4×	1.2k 1.5×	435 1.0×	89 0.8×	56 1.0×	42	3.0k
L. Mashonkina Russia	26	1.7k 0.8×	638 0.8×	370 0.9×	117 1.1×	73 1.3×	88	1.9k
Christopher Sneden United States	23	2.1k 1.0×	913 1.2×	389 0.9×	90 0.8×	38 0.7×	28	2.3k
P. G. Prada Moroni Italy	26	1.7k 0.8×	777 1.0×	269 0.6×	118 1.1×	29 0.5×	89	1.9k
Inese I. Ivans United States	30	3.0k 1.5×	1.1k 1.4×	725 1.7×	174 1.6×	58 1.0×	53	3.2k
C. J. Hansen Germany	24	1.7k 0.8×	522 0.7×	414 1.0×	100 0.9×	131 2.3×	88	1.9k
Masahide Takada‐Hidai Japan	18	1.7k 0.8×	604 0.8×	226 0.5×	82 0.8×	36 0.6×	60	1.8k
V. Adibekyan Portugal	32	3.0k 1.4×	1.2k 1.5×	285 0.7×	78 0.7×	103 1.8×	90	3.1k
Sung-Chul Yoon South Korea	34	3.6k 1.8×	678 0.9×	533 1.3×	65 0.6×	62 1.1×	76	3.7k
Constantine P. Deliyannis United States	30	2.4k 1.1×	872 1.1×	422 1.0×	67 0.6×	40 0.7×	91	2.5k

Countries citing papers authored by Ian U. Roederer

Since Specialization

Citations

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

Fields of papers citing papers by Ian U. Roederer

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ian U. Roederer. 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 Ian U. Roederer. The network helps show where Ian U. Roederer may publish in the future.

Co-authorship network of co-authors of Ian U. Roederer

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

D’Orazi, V., Giuliano Iorio, L. Molnár, et al.. (2025). Rare find: Discovery and chemo-dynamical properties of two s-process-enhanced RR Lyrae stars. Astronomy and Astrophysics. 704. A12–A12.

Hartog, E. A. Den, et al.. (2025). Atomic Transition Probabilities for UV and Optical Lines of Gd ii*. The Astrophysical Journal Supplement Series. 278(1). 7–7.

Hirai, Yutaka, Timothy C. Beers, Young Sun Lee, et al.. (2025). The R-process Alliance: Enrichment of r-process Elements in a Simulated Milky Way–like Galaxy. The Astrophysical Journal. 990(2). 125–125.

Ezzeddine, Rana, Carlos Allende Prieto, Timothy C. Beers, et al.. (2024). The R-process Alliance: Fifth Data Release from the Search for R-process-enhanced Metal-poor Stars in the Galactic Halo with the GTC*. The Astrophysical Journal Supplement Series. 274(2). 39–39. 7 indexed citations

Roederer, Ian U., Timothy C. Beers, Kohei Hattori, et al.. (2024). The R-Process Alliance: 2MASS J22132050–5137385, the Star with the Highest-known r-process Enhancement at [Eu/Fe] = +2.45*. The Astrophysical Journal. 971(2). 158–158. 11 indexed citations

Sakari, Charli M., Ian U. Roederer, Mario Mateo, et al.. (2024). Abundances of Neutron-capture Elements in 62 Stars in the Globular Cluster Messier 15. The Astrophysical Journal. 967(2). 101–101. 5 indexed citations

Hartog, E. A. Den, et al.. (2024). Atomic Transition Probabilities for Ultraviolet and Optical Lines of Tm ii *. The Astrophysical Journal Supplement Series. 274(1). 9–9.

Pace, Andrew B., S. E. Koposov, Matthew G. Walker, et al.. (2023). The kinematics, metallicities, and orbits of six recently discovered Galactic star clusters with Magellan/M2FS spectroscopy. Monthly Notices of the Royal Astronomical Society. 526(1). 1075–1094. 7 indexed citations

Holmbeck, Erika M., Rebecca Surman, Ian U. Roederer, G. C. McLaughlin, & Anna Frebel. (2023). HD 222925: A New Opportunity to Explore the Astrophysical and Nuclear Conditions of r-process Sites. The Astrophysical Journal. 951(1). 30–30. 2 indexed citations

10.

Ji, Alexander P., Joshua D. Simon, Ian U. Roederer, et al.. (2023). Metal Mixing in the r-process Enhanced Ultrafaint Dwarf Galaxy Reticulum II*. The Astronomical Journal. 165(3). 100–100. 21 indexed citations

11.

Walker, Matthew G., Nelson Caldwell, Mario Mateo, et al.. (2023). Magellan/M2FS and MMT/Hectochelle Spectroscopy of Dwarf Galaxies and Faint Star Clusters within the Galactic Halo*. The Astrophysical Journal Supplement Series. 268(1). 19–19. 5 indexed citations

12.

Yong, David, A. F. Marino, Stephanie Monty, et al.. (2022). The complex stellar system M 22: confirming abundance variations with high precision differential measurements. Monthly Notices of the Royal Astronomical Society. 516(3). 3515–3531. 26 indexed citations

13.

Placco, Vinicius M., C. Sneden, Ian U. Roederer, et al.. (2021). Linemake: An Atomic and Molecular Line List Generator. Research Notes of the AAS. 5(4). 92–92. 60 indexed citations

14.

Song, Ying-Yi, Mario Mateo, John I. Bailey, et al.. (2021). Dynamical masses and mass-to-light ratios of resolved massive star clusters – II. Results for 26 star clusters in the Magellanic Clouds. Monthly Notices of the Royal Astronomical Society. 504(3). 4160–4191. 30 indexed citations

15.

Bailey, John I., Timothy D. Brandt, Benjamin A. Mazin, et al.. (2021). Orbital Parameters and Binary Properties of 37 FGK Stars in the Cores of Open Clusters NGC 2516 and NGC 2422. The Astronomical Journal. 162(6). 285–285. 1 indexed citations

16.

Song, Ying-Yi, Mario Mateo, Dougal Mackey, et al.. (2019). Dynamical masses and mass-to-light ratios of resolved massive star clusters – I. NGC 419 and NGC 1846. Monthly Notices of the Royal Astronomical Society. 490(1). 385–407. 8 indexed citations

17.

Ezzeddine, Rana, Anna Frebel, Ian U. Roederer, et al.. (2019). Evidence for an Aspherical Population III Supernova Explosion Inferred from the Hyper-metal-poor Star HE 1327–2326^∗. The Astrophysical Journal. 876(2). 97–97. 46 indexed citations

18.

Hansen, Terese T., Timothy C. Beers, Rana Ezzeddine, et al.. (2019). Testing r-process nucleosynthesis models with two r-process enhanced stars. 15951. 1 indexed citations

19.

Sneden, C., Ian U. Roederer, Ann Merchant Boesgaard, et al.. (2017). Detailed Iron-Group Abundances in a Very Metal-Poor Main Sequence Turnoff Star. 229. 1 indexed citations

20.

Yoon, Jinmi, Timothy C. Beers, Vinicius M. Placco, et al.. (2016). OBSERVATIONAL CONSTRAINTS ON FIRST-STAR NUCLEOSYNTHESIS. I. EVIDENCE FOR MULTIPLE PROGENITORS OF CEMP-NO STARS. The Astrophysical Journal. 833(1). 20–20. 121 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.

Explore authors with similar magnitude of impact