Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:
Physics & Astronomy
SubField 1:
Astronomy & Astrophysics
SubField 2:
Nuclear & Particle Physics
Rank in SubField 1: 525 out of 58,202 Researchers
Data For The Year: 2026
| Metrics | Self-Citations Excluded | All |
|---|---|---|
| Rank Based on Composite Score | 43,981 | 29,413 |
| Total Cites | 17,594 | 27,846 |
| H-index | 68 | 91 |
| Hm-index | 24 | 27 |
| Number of Single Authored Papers | 7 | 7 |
| Total Cites to Single Authored Papers | 211 | 271 |
| Number of Single+First Authored Papers | 26 | 26 |
| Total Cites to Single+First Authored Papers | 1,480 | 1,997 |
| Number of Single+First+Last Authored Papers | 78 | 78 |
| Total Cites to Single+First+Last Authored Papers | 3,777 | 5,280 |
| Composite Score | 3 | 3 |
| Number of Distinct Citing Papers | 8,208 | 10,893 |
| Ratio of Total Citations to Distinct Citing Papers | 2.14 | 2.56 |
| Self-Citation Percentage |
36.82%
|
|
Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:
Physics & Astronomy
SubField 1:
Astronomy & Astrophysics
SubField 2:
Nuclear & Particle Physics
Rank in SubField 1: 559 out of 55,063 Researchers
Data For The Year: 2025
| Metrics | Self-Citations Excluded | All |
|---|---|---|
| Rank Based on Composite Score | 46,401 | 31,675 |
| Total Cites | 15,601 | 24,429 |
| H-index | 64 | 82 |
| Hm-index | 22 | 26 |
| Number of Single Authored Papers | 7 | 7 |
| Total Cites to Single Authored Papers | 193 | 248 |
| Number of Single+First Authored Papers | 26 | 26 |
| Total Cites to Single+First Authored Papers | 1,405 | 1,901 |
| Number of Single+First+Last Authored Papers | 76 | 76 |
| Total Cites to Single+First+Last Authored Papers | 3,487 | 4,861 |
| Composite Score | 3 | 3 |
| Number of Distinct Citing Papers | 7,199 | 9,443 |
| Ratio of Total Citations to Distinct Citing Papers | 2.17 | 2.59 |
| Self-Citation Percentage |
36.14%
|
|
Koopmans, Léon V.E.
University of Groningen, Kapteyn Astronomical Institute,
Netherlands
2021 Rank: 55,227
Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:
Physics & Astronomy
SubField 1:
Astronomy & Astrophysics
SubField 2:
Nuclear & Particle Physics
Rank in SubField 1: 691 out of 45,688 Researchers
Data For The Year: 2021
| Metrics | Self-Citations Excluded | All |
|---|---|---|
| Rank Based on Composite Score | 55,227 | 37,080 |
| Total Cites | 9,790 | 15,580 |
| H-index | 53 | 69 |
| Hm-index | 19 | 22 |
| Number of Single Authored Papers | 7 | 7 |
| Total Cites to Single Authored Papers | 119 | 161 |
| Number of Single+First Authored Papers | 25 | 25 |
| Total Cites to Single+First Authored Papers | 1,140 | 1,587 |
| Number of Single+First+Last Authored Papers | 72 | 72 |
| Total Cites to Single+First+Last Authored Papers | 2,545 | 3,655 |
| Composite Score | 3 | 3 |
| Number of Distinct Citing Papers | 4,481 | 5,821 |
| Ratio of Total Citations to Distinct Citing Papers | 2.18 | 2.68 |
| Self-Citation Percentage |
37.16%
|
|
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