2026 Ralf S. Klessen: Physics Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Physics	128	604	581	50	48	808	54265

Discipline name

D-Index

World Ranking

Current World Ranking

National Ranking

Current National Ranking

Publications

Citations

Physics

128

604

581

808

54265

Overview

Ralf S. Klessen is affiliated with Heidelberg University in Germany and has contributed extensively to the field of Physics and Astronomy. Their research encompasses over a thousand publications, primarily focusing on Astronomy and Astrophysics.

Their work covers several subfields, including:

Astronomy and Astrophysics
Instrumentation
Spectroscopy
Nuclear and High Energy Physics
Atmospheric Science

Key research topics attributed to Ralf S. Klessen include:

Astrophysics and Star Formation Studies
Stellar, planetary, and galactic studies
Galaxies: Formation, Evolution, Phenomena
Astronomy and Astrophysical Research
Gamma-ray bursts and supernovae
Spectroscopy and Laser Applications
Astro and Planetary Science

Their recent notable publications are:

PHANGS-ALMA: Arcsecond CO(2-1) Imaging of Nearby Star-forming Galaxies, 2021, IrInSubria (University of Insubria)
The PHANGS-MUSE survey, 2022, Astronomy and Astrophysics
Distances to PHANGS galaxies: New tip of the red giant branch measurements and adopted distances, 2020, Monthly Notices of the Royal Astronomical Society
The First Stars: Formation, Properties, and Impact, 2023, Annual Review of Astronomy and Astrophysics
Molecular Gas Properties on Cloud Scales across the Local Star-forming Galaxy Population, 2020, The Astrophysical Journal Letters

Frequent coauthors collaborating with Ralf S. Klessen include:

Simon C. O. Glover
Thomas G. Williams
E. Schinnerer
Adam K. Leroy
Daniel A. Dale

Common publication venues where Ralf S. Klessen has frequently appeared are:

arXiv (Cornell University)
Monthly Notices of the Royal Astronomical Society
Astronomy and Astrophysics
The Astrophysical Journal
The Astrophysical Journal Letters

Best Publications

Control of star formation by supersonic turbulence

Mordecai-Mark Mac Low;Ralf S. Klessen

2180
Citations
Comparing the statistics of interstellar turbulence in simulations and observations - Solenoidal versus compressive turbulence forcing

Christoph Federrath;Christoph Federrath;Christoph Federrath;J Roman-Duval;J Roman-Duval;Ralf Klessen;Wolfgang Schmidt;Wolfgang Schmidt

739
Citations
Kinetic Energy Decay Rates of Supersonic and Super-Alfvénic Turbulence in Star-Forming Clouds

Mordecai-Mark Mac Low;Ralf S. Klessen;Andreas Burkert;Michael D. Smith

654
Citations
The Formation of Supermassive Black Holes in the First Galaxies

Dominik R. G. Schleicher;Robi Banerjee;Sharanya Sur;Simon C. O. Glover

578
Citations
The Star Formation Rate of Turbulent Magnetized Clouds: Comparing Theory, Simulations, and Observations

Christoph Federrath;Ralf S. Klessen

571
Citations
SIMULATIONS ON A MOVING MESH: THE CLUSTERED FORMATION OF POPULATION III PROTOSTARS

Thomas H. Greif;Volker Springel;Volker Springel;Simon D. M. White;Simon C. O. Glover

539
Citations
Gravitational collapse in turbulent molecular clouds. I. gasdynamical turbulence

Ralf S. Klessen;Fabian Heitsch;Mordecai Mark Mac Low;Mordecai Mark Mac Low

530
Citations
Molecular Cloud Evolution II. From cloud formation to the early stages of star formation in decaying conditions

E. Vazquez-Semadeni;G.C. Gomez;A. K. Jappsen;J. Ballesteros-Paredes

514
Citations
The Density Probability Distribution in Compressible Isothermal Turbulence: Solenoidal versus Compressive Forcing

Christoph Federrath;Christoph Federrath;Ralf S. Klessen;Wolfram Schmidt

500
Citations
The Formation and Fragmentation of Disks Around Primordial Protostars

Paul C. Clark;Simon C. O. Glover;Rowan J. Smith;Thomas H. Greif

411
Citations
MODELING COLLAPSE AND ACCRETION IN TURBULENT GAS CLOUDS: IMPLEMENTATION AND COMPARISON OF SINK PARTICLES IN AMR AND SPH

Christoph Federrath;Christoph Federrath;Robi Banerjee;Paul C. Clark;Ralf S. Klessen

405
Citations
Molecular Cloud Evolution. II. From Cloud Formation to the Early Stages of Star Formation in Decaying Conditions

Enrique Vázquez-Semadeni;Gilberto C. Gómez;A. Katharina Jappsen;Javier Ballesteros-Paredes

394
Citations
Cluster-formation in the Rosette molecular cloud at the junctions of filaments

N. Schneider;T. Csengeri;M. Hennemann;F. Motte

379
Citations
Formation and evolution of primordial protostellar systems

Thomas H. Greif;Volker Bromm;Paul C. Clark;Simon C. O. Glover

375
Citations
Modelling CO emission – I. CO as a column density tracer and the X factor in molecular clouds

Rahul Shetty;Simon C. Glover;Cornelis P. Dullemond;Ralf S. Klessen;Ralf S. Klessen

371
Citations
Accretion-driven turbulence as universal process: galaxies, molecular clouds, and protostellar disks

Ralf S. Klessen;Ralf S. Klessen;Patrick Hennebelle

365
Citations
The Formation of Stellar Clusters: Gaussian Cloud Conditions. I.

Ralf S. Klessen;Andreas Burkert

362
Citations
The First Galaxies: Chemical Enrichment, Mixing, and Star Formation

Thomas H. Greif;Simon C. O. Glover;Volker Bromm;Ralf S. Klessen;Ralf S. Klessen

361
Citations
A NEW JEANS RESOLUTION CRITERION FOR (M)HD SIMULATIONS OF SELF-GRAVITATING GAS: APPLICATION TO MAGNETIC FIELD AMPLIFICATION BY GRAVITY-DRIVEN TURBULENCE

Christoph Federrath;Christoph Federrath;Sharanya Sur;Dominik R. G Schleicher;Robi Banerjee

360
Citations
Comparing the statistics of interstellar turbulence in simulations and observations

C. Federrath;J. Duval;R. Klessen;W. Schmidt

163
Citations