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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Physics 89 2343 2230 44 43 467 23263

Lex Kaper publications per year

The chart shows the history of publications by Lex Kaper between 1967 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Lex Kaper published across 60 years, from 1967 to 2026, averaging 8.4 papers a year. Output peaked at 44 publications in 2013. 7 of the 506 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1967 to 2026. Vertical axis: number of publications, 0 to 44. Peak 44 publications in 2013. 1967: 1 publication 1968: 1 publication 1969: 0 publications 1970: 4 publications 1971: 3 publications 1972: 0 publications 1973: 0 publications 1974: 0 publications 1975: 0 publications 1976: 0 publications 1977: 0 publications 1978: 0 publications 1979: 0 publications 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 0 publications 1986: 0 publications 1987: 0 publications 1988: 1 publication 1989: 0 publications 1990: 2 publications 1991: 0 publications 1992: 0 publications 1993: 2 publications 1994: 7 publications 1995: 7 publications 1996: 2 publications 1997: 7 publications 1998: 5 publications 1999: 5 publications 2000: 12 publications 2001: 26 publications 2002: 18 publications 2003: 27 publications 2004: 21 publications 2005: 21 publications 2006: 10 publications 2007: 16 publications 2008: 15 publications 2009: 8 publications 2010: 20 publications 2011: 30 publications 2012: 28 publications 2013: 44 publications 2014: 20 publications 2015: 17 publications 2016: 7 publications 2017: 20 publications 2018: 20 publications 2019: 20 publications 2020: 6 publications 2021: 6 publications 2022: 12 publications 2023: 17 publications 2024: 11 publications 2025: 4 publications 2026: 3 publications
1967 2026

506 publications in total across all disciplines

View publications per year as a table
Lex Kaper: publications per year, 1967 to 2026
Year Publications
1967 1
1968 1
1969 0
1970 4
1971 3
1972 0
1973 0
1974 0
1975 0
1976 0
1977 0
1978 0
1979 0
1980 0
1981 0
1982 0
1983 0
1984 0
1985 0
1986 0
1987 0
1988 1
1989 0
1990 2
1991 0
1992 0
1993 2
1994 7
1995 7
1996 2
1997 7
1998 5
1999 5
2000 12
2001 26
2002 18
2003 27
2004 21
2005 21
2006 10
2007 16
2008 15
2009 8
2010 20
2011 30
2012 28
2013 44
2014 20
2015 17
2016 7
2017 20
2018 20
2019 20
2020 6
2021 6
2022 12
2023 17
2024 11
2025 4
2026 3
Total 506
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Lex Kaper 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 Lex Kaper sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 70 bars. Horizontal axis: publications, 103–122 to 1,469+. Vertical axis: number of scientists, 0 to 162. Most scientists, 162, have 323–342 publications. The last bar groups every scientist with 1,469 publications or more. The highlighted bar, 463–482 publications, is where this scientist sits. 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
103–122 publications 1,469+

This scientist: 467 publications — 50th percentile

50% of scientists in this discipline score the same or lower.

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

View publications distribution as a table
Number of Physics scientists by publication count, Research.com 2026 ranking edition. Based on 3,678 ranked scientists.
Publications Scientists This scientist
103–122 7
123–142 10
143–162 31
163–182 35
183–202 53
203–222 81
223–242 85
243–262 112
263–282 114
283–302 126
303–322 136
323–342 162
343–362 155
363–382 156
383–402 134
403–422 145
423–442 147
443–462 131
463–482 131 467
483–502 116
503–522 106
523–542 103
543–562 87
563–582 84
583–602 94
603–622 70
623–642 76
643–662 60
663–682 54
683–702 60
703–722 48
723–742 64
743–762 48
763–782 37
783–802 43
803–822 34
823–842 36
843–862 32
863–882 32
883–902 31
903–922 25
923–942 15
943–962 24
963–982 13
983–1,002 21
1,003–1,022 21
1,023–1,042 16
1,043–1,062 9
1,063–1,082 19
1,083–1,102 11
1,103–1,122 17
1,123–1,142 11
1,143–1,162 7
1,163–1,182 4
1,183–1,202 10
1,203–1,222 8
1,223–1,242 16
1,243–1,262 4
1,263–1,282 10
1,283–1,302 5
1,303–1,322 7
1,323–1,342 4
1,343–1,362 8
1,363–1,382 6
1,383–1,402 7
1,403–1,422 3
1,423–1,442 4
1,443–1,462 4
1,463–1,468 3
1,469+ 100
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Lex Kaper 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 Lex Kaper sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 59 bars. Horizontal axis: D-Index, 70–71 to 185+. Vertical axis: number of scientists, 0 to 167. Most scientists, 167, have 80–81 D-Index. The last bar groups every scientist with 185 D-Index or more. The highlighted bar, 88–89 D-Index, is where this scientist sits. 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
70–71 D-Index 185+

This scientist: 89 D-Index — 38th percentile

38% of scientists in this discipline score the same or lower.

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

View D-Index distribution as a table
Number of Physics scientists by D-index, Research.com 2026 ranking edition. Based on 3,678 ranked scientists.
D-Index Scientists This scientist
70–71 76
72–73 110
74–75 143
76–77 153
78–79 144
80–81 167
82–83 167
84–85 166
86–87 132
88–89 155 89
90–91 134
92–93 137
94–95 102
96–97 112
98–99 110
100–101 116
102–103 97
104–105 103
106–107 87
108–109 90
110–111 67
112–113 78
114–115 75
116–117 67
118–119 69
120–121 60
122–123 59
124–125 53
126–127 42
128–129 41
130–131 33
132–133 32
134–135 45
136–137 19
138–139 24
140–141 28
142–143 31
144–145 22
146–147 20
148–149 12
150–151 16
152–153 24
154–155 23
156–157 15
158–159 15
160–161 11
162–163 17
164–165 12
166–167 11
168–169 9
170–171 9
172–173 11
174–175 4
176–177 8
178–179 5
180–181 3
182–183 4
184 4
185+ 99
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Research.com Recognitions

  • 2020 - Member of Academia Europaea

Overview

Lex Kaper is affiliated with the University of Amsterdam in the Netherlands. Their research primarily focuses on the field of Physics and Astronomy, with 137 publications categorized under this main field of study. Within this domain, Kaper has contributed extensively to subfields including Astronomy and Astrophysics, Instrumentation, Spectroscopy, Atomic and Molecular Physics, and General Health Professions.

Kaper's research covers a variety of topics mainly centered on stellar, planetary, and galactic studies, alongside astrophysics and star formation studies. They also explore broader areas such as astronomy and astrophysical research, astro and planetary science, and astrophysical phenomena and observations. Other specific research interests include gamma-ray bursts and supernovae as well as adaptive optics and wavefront sensing.

The scientist has authored multiple papers published in prominent venues. Frequent publication platforms include Astronomy and Astrophysics, arXiv (Cornell University), The Astrophysical Journal, Nature Astronomy, and the Monthly Notices of the Royal Astronomical Society.

Selected recent publications of Lex Kaper include:

  • The R136 star cluster dissected with Hubble Space Telescope/STIS (2022), Astronomy and Astrophysics
  • X-Shooting ULLYSES: Massive stars at low metallicity (2023), Astronomy and Astrophysics
  • A relation between the radial velocity dispersion of young clusters and their age (2021), Astronomy and Astrophysics
  • Massive pre-main-sequence stars in M17 (2023), Springer Link (Chiba Institute of Technology)
  • The early evolution of young massive clusters (2022), Astronomy and Astrophysics

Throughout their career, Kaper has collaborated frequently with several co-authors, including:

  • A. de Koter
  • F. Backs
  • M. C. Ramírez-Tannus
  • Annelotte Derkink
  • H. Sana

Their work in astrophysics and related fields has been formally recognized by the award of membership in the Academia Europaea in 2020.

Best Publications

  • A very energetic supernova associated with the |[gamma]|-ray burst of 29 March 2003

    Jens Hjorth;Jesper Sollerman;Palle Møller;Johan P. U. Fynbo

  • X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope

    Joel Vernet;H. Dekker;S. D'Odorico;L. Kaper

  • The primordial binary population II: Recovering the binary population for intermediate mass stars in Sco OB2

    M.B.N. Kouwenhoven;A.G.A. Brown;S.F. Portegies Zwart;L. Kaper

  • A NEW POPULATION OF ULTRA-LONG DURATION GAMMA-RAY BURSTS

    Andrew J. Levan;N. R. Tanvir;R. L. C. Starling;K. Wiersema

  • A new population of ultra-long duration gamma-ray bursts

    A.J. Levan;N.R. Tanvir;R.L.C. Starling;K. Wiersema

  • The host of GRB 030323 at z=3.372: A very high column density DLA system with a low metallicity

    P.M. Vreeswijk;S.L. Ellison;S.L. Ellison;C. Ledoux;R.A.M.J. Wijers

  • Discovery of the nearby long, soft GRB 100316D with an associated supernova

    R. L. C. Starling;K. Wiersema;A. J. Levan;T. Sakamoto

  • GRB hosts through cosmic time - VLT/X-Shooter emission-line spectroscopy of 96 GRB-selected galaxies at 0.1 < z < 3.6

    T. Krühler;D. Malesani;J. P. U. Fynbo;O. E. Hartoog

  • The primordial binary population. II. Recovering the binary population for intermediate mass stars in Scorpius OB2

    M. B. N. Kouwenhoven;M. B. N. Kouwenhoven;A. G. A. Brown;S. F. Portegies Zwart;L. Kaper

  • The MiMeS survey of magnetism in massive stars: introduction and overview

    G. A. Wade;C. Neiner;E. Alecian;J. H. Grunhut

  • Discovery of the nearby long, soft GRB 100316D with an associated supernova

    R. L. C. Starling;K. Wiersema;Andrew J. Levan;T. Sakamoto;T. Sakamoto

  • The primordial binary population. I. A near-infrared adaptive optics search for close visual companions to A star members of Scorpius OB2

    M.B.N. Kouwenhoven;A.G.A. Brown;H. Zinnecker;L. Kaper

  • The mass of the neutron star in Vela X-1

    O. Barziv;O. Barziv;L. Kaper;M.H. van Kerkwijk;J.H. Telting

  • Physical parameters of the high-mass X-ray binary 4U1700-37

    Joshua Simon Clark;Simon Goodwin;Paul Crowther;Lex Kaper

  • GRB hosts through cosmic time - VLT/X-Shooter emission-line spectroscopy of 96 γ-ray-burst-selected galaxies at 0.1 <z < 3.6

    T. Krühler;T. Krühler;D. Malesani;J. P. U. Fynbo;O. E. Hartoog

  • Galaxy Counterparts of metal-rich Damped Lyman-alpha Absorbers - I: The case of the z=2.35 DLA towards Q2222-0946

    J. P. U. Fynbo;P. Laursen;C. Ledoux;A. K. Durgapal

  • X-shooter UV- to K-band intermediate-resolution high-efficiency spectrograph for the VLT: status report at the final design review

    Sandro D'Odorico;Hans Dekker;Ruben Mazzoleni;Joel Vernet

  • Discovery of the broad-lined Type Ic SN 2013cq associated with the very energetic GRB 130427A

    D. Xu;A. de Ugarte Postigo;G. Leloudas;T. Kruhler

  • Galaxy counterparts of metal-rich damped Lyman-alpha absorbers - II. A solar-metallicity and dusty DLA at z_abs=2.58

    J. P. U. Fynbo;C. Ledoux;P. Noterdaeme;L. Christensen

  • Coordinated ultraviolet and H-alpha spectroscopy of bright O-type stars

    L. Kaper;H.F. Henrichs;A.W. Fullerton;H. Ando

Frequent Co-Authors

Ralph A. M. J. Wijers
Ralph A. M. J. Wijers University of Amsterdam
Johan P. U. Fynbo
Johan P. U. Fynbo University of Copenhagen
Elena Pian
Elena Pian National Institute for Astrophysics
Nial R. Tanvir
Nial R. Tanvir University of Leicester
A. de Koter
A. de Koter University of Amsterdam
Jochen Greiner
Jochen Greiner Max Planck Society
Jens Hjorth
Jens Hjorth University of Copenhagen
Stefano Covino
Stefano Covino National Institute for Astrophysics
E.P.J. van den Heuvel
E.P.J. van den Heuvel University of Amsterdam
Javier Gorosabel
Javier Gorosabel Spanish National Research Council

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