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Research facility · Rio de Janeiro · Brazil

Valongo Observatory

In research, Valongo Observatory stands highest in Physical Sciences (#7,415 of 12,888 worldwide), 2022–2025. Relative to its size it is most specialised in Astronomy and Astrophysics and Physics and Astronomy — Astronomy and Astrophysics is 82.5× its share of world research.

ov.ufrj.br/en/home-2ROR OpenAlex
World rank, 2022–2025
#14,144
of 28,054 · #12,477 all time
Rank in Brazil
#234
of 714
Research works
680
▲ 8% vs 2013–17
Citations
15k
21.4 per fractional work
Top-10% rate
18.1%
record average 16.5%
Open access
70%
world 28%

What is Valongo Observatory 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
Physical SciencesDomain #7,415 of 12,888 19.4%88 #7123

Each strip is that field’s whole ranked pool, with the notch where Valongo Observatory 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).

What does Valongo Observatory specialise in?

Where its research is concentrated relative to its size: Astronomy and Astrophysics takes 82.5× the share of its output that it takes of world research.

  1. Astronomy and AstrophysicsSubfield · 43.1 works82×
  2. Physics and AstronomyField · 59.9 works27×
← 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: 0.13× its world share, 1 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.24× its world share, 1 worksBiochemistry, Geneti…Immunology and Microbiology: 0.01× its world share, 0 worksImmunology and Micro…Neuroscience: 0.15× its world share, 0 worksNeuroscienceChemical Engineering: 0.11× its world share, 0 worksChemical EngineeringChemistry: 0.27× its world share, 0 worksChemistryComputer Science: 0.34× its world share, 3 worksComputer ScienceEarth and Planetary Sciences: 8.39× its world share, 13 worksEarth and Planetary …Energy: 0.36× its world share, 0 worksEnergyEngineering: 0.28× its world share, 4 worksEngineeringEnvironmental Science: 1.30× its world share, 6 worksEnvironmental ScienceMaterials Science: 0.07× its world share, 0 worksMaterials ScienceMathematics: 0.68× its world share, 1 worksMathematicsPhysics and Astronomy: 26.79× its world share, 60 worksPhysics and AstronomyHealth Professions: 0.15× its world share, 0 worksHealth ProfessionsMedicine: 0.01× its world share, 0 worksMedicineNursing: 0.25× its world share, 0 worksNursingArts and Humanities: 0.20× its world share, 1 worksArts and HumanitiesBusiness, Management and Accounting: 0.05× its world share, 0 worksBusiness, Management…Decision Sciences: 0.09× its world share, 0 worksDecision SciencesEconomics, Econometrics and Finance: 0.47× its world share, 1 worksEconomics, Econometr…Psychology: 0.05× its world share, 0 worksPsychologySocial Sciences: 0.57× its world share, 7 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Physics and Astronomy, 26.8×. Every wedge is a field page.

Who are the top researchers at Valongo Observatory?

Ranked on the composite score, F. Sobreira, H. J. Rocha–Pinto and P. A. A. Lopes lead among researchers whose main affiliation is Valongo Observatory.

  1. 1 F. Sobreira Brazil · #15,524 worldwide 1.2k citations · 47 works
  2. 2 H. J. Rocha–Pinto Brazil · #71,784 worldwide 547 citations · 26 works
  3. 3 P. A. A. Lopes Brazil · #145,856 worldwide 244 citations · 26 works
  4. 4 G. F. Porto de Mello Brazil · #171,575 worldwide 303 citations · 22 works
  5. 5 R. de la Reza Brazil · #603,872 worldwide 213 citations · 51 works
  6. 6 R. Vieira-Martins Brazil · #950,851 worldwide 24 citations · 19 works
  7. 7 M. Assafin Brazil · #1,133,334 worldwide 37 citations · 61 works
  8. 8 R. Vieira Martins Brazil · #1,181,237 worldwide 32 citations · 39 works
  9. 9 F. X. de Araújo Brazil · #1,288,576 worldwide 21 citations · 24 works
  10. 10 S. Daflon Brazil · #1,290,294 worldwide 35 citations · 23 works
All ranked researchers at Valongo Observatory

Which keywords describe research at Valongo Observatory?

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

▲ 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. Star Formation12▲ 224×2 topics
  2. Supernovae12▲ 139×2 topics
  3. Black Holes11▲ 113×3 topics
  4. Dark Matter10▲ 90×3 topics
  5. Cosmology10▲ 142×3 topics
  6. Exoplanets8▲ 210×1 topic
  7. Stellar Astrophysics8▲ 210×1 topic
  8. Galaxies8▲ 295×1 topic
  9. Stellar Populations8▲ 295×1 topic
  10. Dark Energy8▲ 119×2 topics
  11. General Relativity8▲ 113×2 topics
  12. Cosmic Microwave Background8▲ 136×1 topic
  13. Cosmological Parameters8▲ 136×1 topic
  14. Astronomical Instrumentation7▲ 290×1 topic
  15. Spectrograph7▲ 290×1 topic
  16. Gravitational Waves6▲ 99×2 topics
  17. Climate Change5▲ 2.0×17 topics
  18. Accretion Disks5▲ 103×2 topics
  19. Magnetic Fields5▲ 74×2 topics
  20. Nucleosynthesis4▲ 89×2 topics
  21. Gamma-Ray Bursts4▲ 145×1 topic
  22. Neutron Stars4▲ 145×1 topic
  23. Sustainable Development4▲ 2.4×7 topics
  24. Turbulence4▲ 44×2 topics
  25. Molecular Clouds4▲ 147×1 topic
  26. Protoplanetary Disks4▲ 147×1 topic
  27. Public Policy4▲ 7.4×7 topics
  28. Solar System Abundances3▲ 70×1 topic
  29. Terrestrial Planets3▲ 70×1 topic
  30. Environmental Education3▲ 21×3 topics
  31. Electrical Resistivity Tomography3▲ 104×1 topic
  32. Magnetotelluric Imaging3▲ 104×1 topic
  33. Cosmic Rays3▲ 54×2 topics
  34. Neutrinos3▲ 54×2 topics
  35. Geodetic Measurements2▲ 23×2 topics
  36. Quantum Gravity2▲ 29×4 topics
  37. Galactic Center2▲ 52×2 topics
  38. Particle Physics2▲ 30×2 topics
  39. Plate Tectonics2▲ 15×3 topics
  40. Social Sciences2▲ 13×4 topics

Which research topics does Valongo Observatory publish most on?

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

Stellar, planetary, and galactic studies: 8 fractional worksGalaxies: Formation, Evolution, Phenomena: 8 fractional worksCosmology and Gravitatio…8Cosmology and Gravitation Theories: 8 fractional worksAstronomy and Astrophysi…7Astronomy and Astrophysical Research: 7 fractional worksGamma-ray bursts and supernovae: 4 fractional worksAstrophysics and Star Formation Studies: 4 fractional worksAstro and Planetary Scie…3Astro and Planetary Science: 3 fractional worksGeophysical and Geoelectrical Methods: 3 fractional worksPulsars and Gravitational Waves Research: 2 fractional worksGeophysics and Gravity Measurements: 2 fractional works
Astronomy and AstrophysicsInstrumentationGeophysicsOceanography

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

  1. 1 Stellar, planetary, and galactic studies Astronomy and Astrophysics 8 works
  2. 2 Galaxies: Formation, Evolution, Phenomena Astronomy and Astrophysics 8 works
  3. 3 Cosmology and Gravitation Theories Astronomy and Astrophysics 8 works
  4. 4 Astronomy and Astrophysical Research Instrumentation 7 works
  5. 5 Gamma-ray bursts and supernovae Astronomy and Astrophysics 4 works
  6. 6 Astrophysics and Star Formation Studies Astronomy and Astrophysics 4 works
  7. 7 Astro and Planetary Science Astronomy and Astrophysics 3 works
  8. 8 Geophysical and Geoelectrical Methods Geophysics 3 works
  9. 9 Pulsars and Gravitational Waves Research Astronomy and Astrophysics 2 works
  10. 10 Geophysics and Gravity Measurements Oceanography 2 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 available70.0%not open30.0%

World: 28% of research is openly available.

with international co-authors46.2%domestic only53.8%

World: 19% is written across borders.

How has Valongo Observatory's research output changed?

Output in 2018–2022 was 8% higher 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 Rio de Janeiro

All research institutions in Rio de Janeiro

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.