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Research facility · Paris · France

Institut d'Astrophysique de Paris

In research, Institut d'Astrophysique de Paris stands highest in Astronomy and Astrophysics (#28 of 443 worldwide), Physical Sciences (#1,474 of 12,888 worldwide) and Physics and Astronomy (#371 of 1,646 worldwide), 2022–2025. Relative to its size it is most specialised in Astronomy and Astrophysics, Physics and Astronomy and Nuclear and High Energy Physics — Astronomy and Astrophysics is 111.8× its share of world research.

iap.frROR OpenAlex
World rank, 2022–2025
#2,633
of 28,054 · #2,090 all time
Rank in France
#45
of 1,422
Research works
2.5k
▼ 28% vs 2013–17
Citations
102k
40.4 per fractional work
Top-10% rate
35.2%
record average 16.5%
Open access
63%
world 28%

What is Institut d'Astrophysique de Paris known for in research?

The fields where it stands highest, 2022–2025, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Astronomy and AstrophysicsSubfield #28 of 443 37.7%146 #58
Physical SciencesDomain #1,474 of 12,888 37.4%231 #1376
Physics and AstronomyField #371 of 1,646 38.9%200 #536

Each strip is that field’s whole ranked pool, with the notch where Institut d'Astrophysique de Paris sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no world mark, because the world rate differs by field (from about 6% to 21% in this record).

Which of those standings moved

The same fields on both windows: where it stood over the whole record, and where it stands in 2022–2025. The distance is the story, and it is the one thing the two rank columns above cannot show.

  1. Astronomy and Astrophysics#58 #28
  2. Physical Sciences#1,376 #1,474
  3. Physics and Astronomy#536 #371
all time2022–2025, better2022–2025, worse

A dot further right is a better standing. Fields it was not ranked in over the whole record are left out.

What does Institut d'Astrophysique de Paris specialise in?

Where its research is concentrated relative to its size: Astronomy and Astrophysics takes 111.8× the share of its output that it takes of world research.

  1. Astronomy and AstrophysicsSubfield · 146.3 works112×
  2. Physics and AstronomyField · 200.4 works36×
  3. Nuclear and High Energy PhysicsSubfield · 25.6 works32×
← less than its size predicts1×more →

Location quotient, a volume reading rather than an impact one. It surfaces small, lopsided specialities.

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 0.04× its world share, 0 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.18× its world share, 2 worksBiochemistry, Geneti…Neuroscience: 0.08× its world share, 0 worksNeuroscienceChemical Engineering: 0.01× its world share, 0 worksChemical EngineeringChemistry: 0.76× its world share, 3 worksChemistryComputer Science: 0.40× its world share, 8 worksComputer ScienceEarth and Planetary Sciences: 1.05× its world share, 4 worksEarth and Planetary …Engineering: 0.25× its world share, 10 worksEngineeringEnvironmental Science: 0.13× its world share, 2 worksEnvironmental ScienceMaterials Science: 0.16× its world share, 1 worksMaterials ScienceMathematics: 1.13× its world share, 3 worksMathematicsPhysics and Astronomy: 35.78× its world share, 200 worksPhysics and AstronomyHealth Professions: 0.21× its world share, 1 worksHealth ProfessionsMedicine: 0.08× its world share, 4 worksMedicineArts and Humanities: 0.51× its world share, 4 worksArts and HumanitiesDecision Sciences: 0.12× its world share, 0 worksDecision SciencesEconomics, Econometrics and Finance: 0.52× its world share, 3 worksEconomics, Econometr…Psychology: 0.09× its world share, 1 worksPsychologySocial Sciences: 0.14× its world share, 4 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Physics and Astronomy, 35.8×. Every wedge is a field page.

Who are the top researchers at Institut d'Astrophysique de Paris?

Ranked on the composite score, E. Hivon, B. D. Wandelt and Gustavo Bruzual lead among researchers whose main affiliation is Institut d'Astrophysique de Paris.

  1. 1 E. Hivon France · #2,357 worldwide 3.4k citations · 81 works
  2. 2 B. D. Wandelt France · #2,969 worldwide 3.2k citations · 129 works
  3. 3 Gustavo Bruzual France · #4,618 worldwide 2.1k citations · 66 works
  4. 4 F. R. Bouchet France · #5,374 worldwide 2.6k citations · 116 works
  5. 5 J. Väliviita France · #9,787 worldwide 1.6k citations · 87 works
  6. 6 V. Lindholm France · #25,196 worldwide 714 citations · 64 works
  7. 7 S. Colombi France · #25,726 worldwide 1.6k citations · 36 works
  8. 8 Y. Mellier France · #28,417 worldwide 1.3k citations · 136 works
  9. 9 H. J. McCracken France · #30,111 worldwide 1.5k citations · 120 works
  10. 10 A. Troja France · #31,024 worldwide 476 citations · 47 works
All ranked researchers at Institut d'Astrophysique de Paris

Which keywords describe research at Institut d'Astrophysique de Paris?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Black Holes, Star Formation, Dark Matter, Cosmology, Supernovae, Galaxies, Stellar Populations and Gravitational Waves.

▲ more of its work than of the world’s◆ about the world’s share▼ less than the world’s

Size is fractional works in 2022–2025 in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Black Holes41▲ 173×3 topics
  2. Star Formation37▲ 280×2 topics
  3. Dark Matter36▲ 122×4 topics
  4. Cosmology33▲ 199×3 topics
  5. Supernovae33▲ 160×2 topics
  6. Galaxies27▲ 383×1 topic
  7. Stellar Populations27▲ 383×1 topic
  8. Gravitational Waves26▲ 189×2 topics
  9. Exoplanets21▲ 210×1 topic
  10. Stellar Astrophysics21▲ 210×1 topic
  11. Accretion Disks20▲ 171×2 topics
  12. Magnetic Fields20▲ 124×2 topics
  13. General Relativity18▲ 103×2 topics
  14. Dark Energy17▲ 105×2 topics
  15. Nucleosynthesis17▲ 140×3 topics
  16. Cosmic Microwave Background17▲ 122×1 topic
  17. Cosmological Parameters17▲ 122×1 topic
  18. Astronomical Instrumentation17▲ 263×1 topic
  19. Spectrograph17▲ 263×1 topic
  20. Gamma-Ray Bursts16▲ 241×1 topic
  21. Neutron Stars16▲ 241×1 topic
  22. Galactic Center16▲ 140×2 topics
  23. Cosmic Rays14▲ 114×2 topics
  24. Neutrinos14▲ 114×2 topics
  25. Radio Astronomy12▲ 222×2 topics
  26. Spectroscopy11▲ 26×4 topics
  27. Turbulence10▲ 48×2 topics
  28. Binary Black Hole10▲ 141×1 topic
  29. Equation of State10▲ 78×2 topics
  30. Molecular Clouds10▲ 166×1 topic
  31. Neutron Star10▲ 141×1 topic
  32. Protoplanetary Disks10▲ 166×1 topic
  33. High-Resolution Imaging10▲ 83×1 topic
  34. Transits of Venus10▲ 415×1 topic
  35. Event Horizon Telescope10▲ 178×1 topic
  36. X-Ray Astronomy10▲ 178×1 topic
  37. Particle Physics9▲ 46×2 topics
  38. High-Energy Astrophysics8▲ 122×1 topic
  39. Particle Acceleration8▲ 122×1 topic
  40. Solar System Abundances8▲ 67×1 topic

Which research topics does Institut d'Astrophysique de Paris publish most on?

By volume in 2022–2025: Galaxies: Formation, Evolution, Phenomena, Stellar, planetary, and galactic studies, Cosmology and Gravitation Theories and Astronomy and Astrophysical Research.

Galaxies: Formation, Evolution, Phenomena: 27 fractional worksStellar, planetary, and galactic studies: 21 fractional worksCosmology and Gravitatio…17Cosmology and Gravitation Theories: 17 fractional worksAstronomy and Astrophysi…17Astronomy and Astrophysical Research: 17 fractional worksGamma-ray bursts and supernovae: 16 fractional worksAstrophysics and Star Formation Studies: 10 fractional worksPulsars and Gravitationa…10Pulsars and Gravitational Waves Research: 10 fractional worksHistory and Developments in Astronomy: 10 fractional worksAstrophysical Phenomena and Observations: 10 fractional worksAstrophysics and Cosmic Phenomena: 8 fractional works
Astronomy and AstrophysicsInstrumentationNuclear and High Energy Physics

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Galaxies: Formation, Evolution, Phenomena Astronomy and Astrophysics 27 works
  2. 2 Stellar, planetary, and galactic studies Astronomy and Astrophysics 21 works
  3. 3 Cosmology and Gravitation Theories Astronomy and Astrophysics 17 works
  4. 4 Astronomy and Astrophysical Research Instrumentation 17 works
  5. 5 Gamma-ray bursts and supernovae Astronomy and Astrophysics 16 works
  6. 6 Astrophysics and Star Formation Studies Astronomy and Astrophysics 10 works
  7. 7 Pulsars and Gravitational Waves Research Astronomy and Astrophysics 10 works
  8. 8 History and Developments in Astronomy Astronomy and Astrophysics 10 works
  9. 9 Astrophysical Phenomena and Observations Astronomy and Astrophysics 10 works
  10. 10 Astrophysics and Cosmic Phenomena Nuclear and High Energy Physics 8 works

How open and international is its research?

Against the world’s own shares — the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available63.1%not open36.9%

World: 28% of research is openly available.

with international co-authors40.7%domestic only59.3%

World: 19% is written across borders.

How has Institut d'Astrophysique de Paris's research output changed?

Output in 2018–2022 was 28% lower than in 2013–2017.

1990200020102020
grewheldshrank

The same series as a ribbon — one cell per year, darker for more. The line above answers how much; this answers when.

Other research institutions in Paris

All research institutions in Paris

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners are in the interactive view on the map.