2026 John J. Cowan: Physics Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Physics	81	2933	2786	1431	1333	305	23661

Discipline name

D-Index

World Ranking

Current World Ranking

National Ranking

Current National Ranking

Publications

Citations

Physics

2933

2786

1431

1333

305

23661

Overview

John J. Cowan is affiliated with the University of Oklahoma in the United States. Their research primarily spans the field of Physics and Astronomy, with a focus on subfields such as Astronomy and Astrophysics, Nuclear and High Energy Physics, Instrumentation, and Atomic and Molecular Physics, and Optics.

The scientist has contributed significantly to the study of stellar, planetary, and galactic systems, astrophysics and star formation, as well as nuclear physics research. Their work covers specific topics including gamma-ray bursts and supernovae, pulsars, gravitational waves, and astronomical and nuclear sciences.

John J. Cowan has published several papers, including:

Origin of the heaviest elements: The rapid neutron-capture process, 2021, Reviews of Modern Physics
Element abundance patterns in stars indicate fission of nuclei heavier than uranium, 2023, Science
The R-Process Alliance: Abundance Universality among Some Elements at and between the First and Second R-Process Peaks, 2022, The Astrophysical Journal
Vanadium Abundance Derivations in 255 Metal-poor Stars, 2020, The Astrophysical Journal
Iron-peak Element Abundances in Warm Very Metal-poor Stars, 2023, The Astrophysical Journal

The scientist's frequent coauthors include Ian U. Roederer, C. Sneden, J. E. Lawler, E. A. Den Hartog, and Ann Merchant Boesgaard.

Publication venues where John J. Cowan's work commonly appears include:

The Astrophysical Journal
The Astrophysical Journal Supplement Series
arXiv (Cornell University)
Reviews of Modern Physics
Science

Best Publications

Neutron-Capture Elements in the Early Galaxy

Christopher A Sneden;John J. Cowan;Roberto Gallino;Roberto Gallino

974
Citations
The R-process and nucleochronology

John J. Cowan;Friedrich-Karl Thielemann;James W. Truran

911
Citations
Neutron-Capture Elements in the Early Galaxy: Insights from a Large Sample of Metal-poor Giants

Debra L. Burris;Catherine A. Pilachowski;Taft E Armandroff;Christopher A Sneden

858
Citations
Galactic Evolution of Sr, Y, Zr: A Multiplicity of Nucleosynthetic Processes

Claudia Travaglio;Roberto Gallino;Enrico Arnone;John Cowan

850
Citations
Neutron-Capture Elements in the Early Galaxy: Insights from a Large Sample of Metal-Poor Giants

Debra L. Burris;Catherine A. Pilachowski;Taft E. Armandroff;Christopher Sneden

794
Citations
GALACTIC EVOLUTION OF Sr, Y, AND Zr: A MULTIPLICITY OF NUCLEOSYNTHETIC PROCESSES

Claudia Travaglio;Roberto Gallino;Enrico Arnone;Enrico Arnone;John Cowan

737
Citations
The Ultra--Metal-poor, Neutron-Capture--rich Giant Star CS 22892-052

Christopher Sneden;Andrew McWilliam;George W. Preston;John J. Cowan

682
Citations
The Extremely Metal-poor, Neutron Capture-rich Star CS 22892-052: A Comprehensive Abundance Analysis

Christopher Sneden;John J. Cowan;John J. Cowan;James E. Lawler;Inese I. Ivans;Inese I. Ivans

621
Citations
Origin of the heaviest elements: The rapid neutron-capture process

John J. Cowan;Christopher Sneden;James E. Lawler;Ani Aprahamian

474
Citations
The Abundances of Neutron Capture Species in the Very Metal-Poor Globular Cluster M15: An Uniform Analysis of RGB and RHB Stars

J. S. Sobeck;R. P. Kraft;C. Sneden;G. W. Preston

465
Citations
The r-Process-enriched Low-Metallicity Giant HD?115444

Jenny Westin;Christopher Sneden;Bengt Gustafsson;John J. Cowan

421
Citations
The Rise of the s-Process in the Galaxy

Jennifer Simmerer;Christopher A Sneden;John J. Cowan;Jason Collier

416
Citations
The Chemical Composition and Age of the Metal-poor Halo Star BD +17°3248*

John J. Cowan;Christopher Sneden;Scott Burles;Inese I. Ivans

396
Citations
The Chemical Composition and Age of the Metal-Poor Halo Star BD +17^\circ 3248

John J. Cowan;Christopher Sneden;Scott Burles;Inese I. Ivans

395
Citations
THE ABUNDANCES OF NEUTRON-CAPTURE SPECIES IN THE VERY METAL-POOR GLOBULAR CLUSTER M15: A UNIFORM ANALYSIS OF RED GIANT BRANCH AND RED HORIZONTAL BRANCH STARS

Jennifer S. Sobeck;Robert P. Kraft;Christopher Sneden;George W. Preston

376
Citations
Nuclei in the cosmos

Heinz Oberhummer;J. H. Applegate;J. J. Cowan;F. Käppeler

344
Citations
Evidence of multiple r-process sites in the early galaxy: new observations of cs 22892-052

Christopher A Sneden;John J. Cowan;Inese I. Ivans;George M. Fuller

342
Citations
The astrophysical r-process: A comparison of calculations following adiabatic expansion with classical calculations based on neutron densities and temperatures

C. Freiburghaus;C. Freiburghaus;J.F. Rembges;T. Rauscher;E. Kolbe;E. Kolbe

319
Citations
Near-UV Observations of HD221170: New Insights into the Nature of r-Process-Rich Stars

Inese I. Ivans;Jennifer Simmerer;Christopher Sneden;James E. Lawler

305
Citations
r-Process Abundances and Chronometers in Metal-poor Stars

John J. Cowan;B. Pfeiffer;K.-L. Kratz;F.-K. Thielemann

305
Citations