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Researcher · Heidelberg University · Germany

Ralf Stephan Klessen

Ralf Stephan Klessen publishes mostly in Astronomy and Astrophysics, Instrumentation and Spectroscopy, on topics such as Astrophysics and Star Formation Studies, Stellar, planetary, and galactic studies and Galaxies: Formation, Evolution, Phenomena.

ORCID 0000-0002-0560-3172 OpenAlex
World rank
#19,047
of 7,710,434 ranked researchers
Rank in Germany
#1,101
of 364,343
Works
1,024
Citations
36k
Citations per work
35.3
h-index
100
i10-index 473Top 0.6% in Astronomy and Astrophysics
Ralf Stephan Klessen

What does Ralf Stephan Klessen research?

Ralf Stephan Klessen's work is mostly in Physics and Astronomy (81%), Chemistry (4%), Earth and Planetary Sciences (3%).

Physical Sciences: 905 works · 88.4% of their workPhysics and Astronomy: 834 works · 81.4% of their workAstronomy and Astrophysics: 703 works · 68.7% of their workInstrumentation: 76 works · 7.4% of their workAtomic and Molecular Physics, and Optics: 30 works · 2.9% of their workNuclear and High Energy Physics: 25 works · 2.4% of their workChemistry: 40 works · 3.9% of their workSpectroscopy: 40 works · 3.9% of their workEarth and Planetary Sciences: 32 works · 3.1% of their workAtmospheric Science: 32 works · 3.1% of their workEverything else: 119 works · 11.6% of their workTHEIR WORKRalf StephanKlessen1,024works
Physical Sciences88%

Their six largest subfields, inside their fields and domains; the grey slice is everything else they publish. The interactive view splits every one of their works down to single topics.

The fields and subfields, with their numbers
    1. Physics and Astronomy83481.4%
    2. Chemistry403.9%
    3. Earth and Planetary Sciences323.1%
  2. Everything else11911.6%
  1. 1Astronomy and Astrophysics69% of their works
  2. 2Instrumentation7% of their works
  3. 3Spectroscopy4% of their works
  4. 4Atmospheric Science3% of their works
  5. 5Atomic and Molecular Physics, and Optics3% of their works
  6. 6Nuclear and High Energy Physics2% of their works

Research topics

Which keywords describe Ralf Stephan Klessen's research?

The keywords of their largest research topics: Star Formation, Accretion Disks, Magnetic Fields, Molecular Clouds, Protoplanetary Disks, Exoplanets, Stellar Astrophysics and Black Holes.

Size is their works in the topics tagged with each word, from their 8 largest topics. Each links to the topic it comes from most. The words come from the keyword list OpenAlex gives each topic, not from the text of the papers, so a word can appear that none of the papers uses.

All 20 words, with their numbers
  1. Star Formation1,0302 topics
  2. Accretion Disks7292 topics
  3. Magnetic Fields7292 topics
  4. Molecular Clouds6641 topic
  5. Protoplanetary Disks6641 topic
  6. Exoplanets5001 topic
  7. Stellar Astrophysics5001 topic
  8. Black Holes4312 topics
  9. Cosmology3661 topic
  10. Galaxies3661 topic
  11. Astronomical Instrumentation2171 topic
  12. Spectrograph2171 topic
  13. Solar System Abundances1531 topic
  14. Terrestrial Planets1531 topic
  15. Gamma-Ray Bursts921 topic
  16. Supernovae921 topic
  17. Ozone Depletion741 topic
  18. Stratospheric Water Vapor741 topic
  19. Event Horizon Telescope651 topic
  20. X-Ray Astronomy651 topic

Where does Ralf Stephan Klessen work?

Ralf Stephan Klessen's main affiliation in the publication record is Heidelberg University, Germany.

How many publications and citations does Ralf Stephan Klessen have?

OpenAlex counts 1,024 works and 36,145 citations for Ralf Stephan Klessen, an h-index of 100, ranking #19,047 of 7,710,434 researchers worldwide on the quality score.

Ranked on field-normalised citation excellence (50%), output (30%) and citations (20%). Counts come from OpenAlex author records, which occasionally merge different people who share a name or split one person into several.

Papers, co-authors, who cited this work and researchers on the nearest topics have tabs of their own, above. Is this your page? Claim it with your ORCID iD, or request a correction or removal.

Discussion

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