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Ralf S. Klessen

Ralf S. Klessen

Heidelberg University
Germany

D-Index & Metrics

Physics

D-Index
128
Citations
54265
World Ranking
604
National Ranking
50

Ralf S. Klessen publication distribution in Physics in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Physics in 2026. The highlighted bar marks where Ralf S. Klessen sits on this spectrum.

103–122 publications: 7 scientists 123–142 publications: 10 scientists 143–162 publications: 31 scientists 163–182 publications: 35 scientists 183–202 publications: 53 scientists 203–222 publications: 81 scientists 223–242 publications: 85 scientists 243–262 publications: 112 scientists 263–282 publications: 114 scientists 283–302 publications: 126 scientists 303–322 publications: 136 scientists 323–342 publications: 162 scientists 343–362 publications: 155 scientists 363–382 publications: 156 scientists 383–402 publications: 134 scientists 403–422 publications: 145 scientists 423–442 publications: 147 scientists 443–462 publications: 131 scientists 463–482 publications: 131 scientists 483–502 publications: 116 scientists 503–522 publications: 106 scientists 523–542 publications: 103 scientists 543–562 publications: 87 scientists 563–582 publications: 84 scientists 583–602 publications: 94 scientists 603–622 publications: 70 scientists 623–642 publications: 76 scientists 643–662 publications: 60 scientists 663–682 publications: 54 scientists 683–702 publications: 60 scientists 703–722 publications: 48 scientists 723–742 publications: 64 scientists 743–762 publications: 48 scientists 763–782 publications: 37 scientists 783–802 publications: 43 scientists 803–822 publications: 34 scientists 823–842 publications: 36 scientists 843–862 publications: 32 scientists 863–882 publications: 32 scientists 883–902 publications: 31 scientists 903–922 publications: 25 scientists 923–942 publications: 15 scientists 943–962 publications: 24 scientists 963–982 publications: 13 scientists 983–1,002 publications: 21 scientists 1,003–1,022 publications: 21 scientists 1,023–1,042 publications: 16 scientists 1,043–1,062 publications: 9 scientists 1,063–1,082 publications: 19 scientists 1,083–1,102 publications: 11 scientists 1,103–1,122 publications: 17 scientists 1,123–1,142 publications: 11 scientists 1,143–1,162 publications: 7 scientists 1,163–1,182 publications: 4 scientists 1,183–1,202 publications: 10 scientists 1,203–1,222 publications: 8 scientists 1,223–1,242 publications: 16 scientists 1,243–1,262 publications: 4 scientists 1,263–1,282 publications: 10 scientists 1,283–1,302 publications: 5 scientists 1,303–1,322 publications: 7 scientists 1,323–1,342 publications: 4 scientists 1,343–1,362 publications: 8 scientists 1,363–1,382 publications: 6 scientists 1,383–1,402 publications: 7 scientists 1,403–1,422 publications: 3 scientists 1,423–1,442 publications: 4 scientists 1,443–1,462 publications: 4 scientists 1,463–1,468 publications: 3 scientists 1,469+ publications: 100 scientists
103 publications 1,469+

This scientist: 808 publications — 85th percentile

85% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,469 publications or more.

Ralf S. Klessen D-index placement in Physics in 2026

The chart shows the D-index (discipline H-index) distribution of Physics scientists ranked by Research.com in 2026. The highlighted bar marks where Ralf S. Klessen sits on this spectrum.

70–71 D-Index: 76 scientists 72–73 D-Index: 110 scientists 74–75 D-Index: 143 scientists 76–77 D-Index: 153 scientists 78–79 D-Index: 144 scientists 80–81 D-Index: 167 scientists 82–83 D-Index: 167 scientists 84–85 D-Index: 166 scientists 86–87 D-Index: 132 scientists 88–89 D-Index: 155 scientists 90–91 D-Index: 134 scientists 92–93 D-Index: 137 scientists 94–95 D-Index: 102 scientists 96–97 D-Index: 112 scientists 98–99 D-Index: 110 scientists 100–101 D-Index: 116 scientists 102–103 D-Index: 97 scientists 104–105 D-Index: 103 scientists 106–107 D-Index: 87 scientists 108–109 D-Index: 90 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 78 scientists 114–115 D-Index: 75 scientists 116–117 D-Index: 67 scientists 118–119 D-Index: 69 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 59 scientists 124–125 D-Index: 53 scientists 126–127 D-Index: 42 scientists 128–129 D-Index: 41 scientists 130–131 D-Index: 33 scientists 132–133 D-Index: 32 scientists 134–135 D-Index: 45 scientists 136–137 D-Index: 19 scientists 138–139 D-Index: 24 scientists 140–141 D-Index: 28 scientists 142–143 D-Index: 31 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 20 scientists 148–149 D-Index: 12 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 24 scientists 154–155 D-Index: 23 scientists 156–157 D-Index: 15 scientists 158–159 D-Index: 15 scientists 160–161 D-Index: 11 scientists 162–163 D-Index: 17 scientists 164–165 D-Index: 12 scientists 166–167 D-Index: 11 scientists 168–169 D-Index: 9 scientists 170–171 D-Index: 9 scientists 172–173 D-Index: 11 scientists 174–175 D-Index: 4 scientists 176–177 D-Index: 8 scientists 178–179 D-Index: 5 scientists 180–181 D-Index: 3 scientists 182–183 D-Index: 4 scientists 184 D-Index: 4 scientists 185+ D-Index: 99 scientists
70 D-Index 185+

This scientist: 128 D-Index — 84th percentile

84% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 185 D-Index or more.

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

  • 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

  • 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

  • The Formation of Supermassive Black Holes in the First Galaxies

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

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

    Christoph Federrath;Ralf S. Klessen

  • 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

  • Gravitational collapse in turbulent molecular clouds. I. gasdynamical turbulence

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

  • 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

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

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

  • The Formation and Fragmentation of Disks Around Primordial Protostars

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

  • 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

  • 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

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

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

  • Formation and evolution of primordial protostellar systems

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

  • 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

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

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

  • The Formation of Stellar Clusters: Gaussian Cloud Conditions. I.

    Ralf S. Klessen;Andreas Burkert

  • The First Galaxies: Chemical Enrichment, Mixing, and Star Formation

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

  • 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

  • Comparing the statistics of interstellar turbulence in simulations and observations

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

Frequent Co-Authors

Simon C. O. Glover
Simon C. O. Glover Heidelberg University
Christoph Federrath
Christoph Federrath Australian National University
Mordecai-Mark Mac Low
Mordecai-Mark Mac Low American Museum of Natural History
Volker Bromm
Volker Bromm The University of Texas at Austin
James Urquhart
James Urquhart University of Kent
Henrik Beuther
Henrik Beuther Max Planck Society
Volker Springel
Volker Springel Max Planck Institute for Astrophysics
Nicola Schneider
Nicola Schneider University of Cologne
Patrick Hennebelle
Patrick Hennebelle University of Paris-Saclay
Norbert Christlieb
Norbert Christlieb Heidelberg University

External Links

Wikipedia of Ralf S. Klessen Personal website of Ralf S. Klessen

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Best Scientists Citing Ralf S. Klessen

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