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Michael F. A'Hearn

D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Physics 95 1942 1006 782 30417

Michael F. A'Hearn publications per year

The chart shows the history of publications by Michael F. A'Hearn between 1964 and 2021, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Michael F. A'Hearn published across 58 years, from 1964 to 2021, averaging 13.9 papers a year. Output peaked at 54 publications in 2015. 2 of the 804 publications appeared in the last two years.

No. of publications
10 20 30 40 50
Bar chart. Horizontal axis: year, 1964 to 2021. Vertical axis: number of publications, 0 to 54. Peak 54 publications in 2015. 1964: 1 publication 1965: 1 publication 1966: 0 publications 1967: 0 publications 1968: 0 publications 1969: 0 publications 1970: 0 publications 1971: 1 publication 1972: 1 publication 1973: 0 publications 1974: 2 publications 1975: 2 publications 1976: 2 publications 1977: 4 publications 1978: 3 publications 1979: 3 publications 1980: 6 publications 1981: 7 publications 1982: 8 publications 1983: 8 publications 1984: 11 publications 1985: 13 publications 1986: 16 publications 1987: 5 publications 1988: 11 publications 1989: 7 publications 1990: 10 publications 1991: 10 publications 1992: 8 publications 1993: 4 publications 1994: 13 publications 1995: 15 publications 1996: 15 publications 1997: 25 publications 1998: 16 publications 1999: 17 publications 2000: 15 publications 2001: 9 publications 2002: 10 publications 2003: 4 publications 2004: 18 publications 2005: 34 publications 2006: 29 publications 2007: 37 publications 2008: 38 publications 2009: 26 publications 2010: 33 publications 2011: 45 publications 2012: 27 publications 2013: 39 publications 2014: 25 publications 2015: 54 publications 2016: 48 publications 2017: 50 publications 2018: 12 publications 2019: 4 publications 2020: 0 publications 2021: 2 publications
1964 2021

804 publications in total across all disciplines

View publications per year as a table
Michael F. A'Hearn: publications per year, 1964 to 2021
Year Publications
1964 1
1965 1
1966 0
1967 0
1968 0
1969 0
1970 0
1971 1
1972 1
1973 0
1974 2
1975 2
1976 2
1977 4
1978 3
1979 3
1980 6
1981 7
1982 8
1983 8
1984 11
1985 13
1986 16
1987 5
1988 11
1989 7
1990 10
1991 10
1992 8
1993 4
1994 13
1995 15
1996 15
1997 25
1998 16
1999 17
2000 15
2001 9
2002 10
2003 4
2004 18
2005 34
2006 29
2007 37
2008 38
2009 26
2010 33
2011 45
2012 27
2013 39
2014 25
2015 54
2016 48
2017 50
2018 12
2019 4
2020 0
2021 2
Total 804
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Michael F. A'Hearn 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 Michael F. A'Hearn 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, 763–782 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: 782 publications — 83rd percentile

83% 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
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 37 782
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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Michael F. A'Hearn 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 Michael F. A'Hearn 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, 94–95 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: 95 D-Index — 49th percentile

49% 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
90–91 134
92–93 137
94–95 102 95
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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Overview

Michael F. A'Hearn was affiliated with the University of Maryland, College Park in the United States. Their research contributions primarily spanned the fields of Physics and Astronomy as well as Environmental Science, with a particular focus on Astronomy and Astrophysics and Ecology at the subfield level.

The main areas of study in which they were involved included Astro and Planetary Science, Isotope Analysis in Ecology, Stellar, planetary, and galactic studies, and Planetary Science and Exploration.

A'Hearn's recent published work appeared in The Astronomical Journal, with two papers dated 2021. These papers were entitled "Analysis of Hybrid Gas-Dust Outbursts Observed at 67P/Churyumov-Gerasimenko" and "Spatial Distribution of Ultraviolet Emission from Cometary Activity at 67P/Churyumov-Gerasimenko," both reflecting research on cometary phenomena.

  • Analysis of Hybrid Gas-Dust Outbursts Observed at 67P/Churyumov-Gerasimenko, 2021, The Astronomical Journal
  • Spatial Distribution of Ultraviolet Emission from Cometary Activity at 67P/Churyumov-Gerasimenko, 2021, The Astronomical Journal

Frequent collaborators with A'Hearn included John W. Noonan, P. D. Feldman, S. A. Stern, J. W. Parker, and Brian A. Keeney. This indicates a consistent pattern of joint research efforts primarily focused on planetary science topics.

  • John W. Noonan
  • P. D. Feldman
  • S. A. Stern
  • J. W. Parker
  • Brian A. Keeney

The venue that featured most of their recent publications was The Astronomical Journal, with multiple publications appearing there.

  • The Astronomical Journal

Best Publications

  • The Ensemble Properties of Comets: Results from Narrowband Photometry of 85 Comets, 1976-1992

    Michael F. A'Hearn;Robert C. Millis;David O. Schleicher;David J. Osip

  • Comet Bowell 1980b

    M. F. A'Hearn;D. G. Schleicher;R. L. Millis;P. D. Feldman

  • On the nucleus structure and activity of comet 67P/Churyumov-Gerasimenko

    Holger Sierks;Cesare Barbieri;Philippe L. Lamy;Rafael Rodrigo;Rafael Rodrigo

  • EPOXI at Comet Hartley 2

    Michael F. A’Hearn;Michael J. S. Belton;W. Alan Delamere;Lori M. Feaga

  • Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2009

    B. A. Archinal;M. F. A’Hearn;E. Bowell;A. Conrad

  • OSIRIS – The Scientific Camera System Onboard Rosetta

    H. U. Keller;C. Barbieri;P. Lamy;H. Rickman

  • Spitzer Spectral Observations of the Deep Impact Ejecta

    C. M. Lisse;C. M. Lisse;J. VanCleve;A. C. Adams;M. F. A'Hearn

  • Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun

    Alessandra Rotundi;Alessandra Rotundi;Holger Sierks;Vincenzo Della Corte;Marco Fulle

  • The morphological diversity of comet 67P/Churyumov-Gerasimenko

    Nicolas Thomas;Holger Sierks;Cesare Barbieri;Philippe L. Lamy

  • Studies of proton-irradiated cometary-type ice mixtures

    Marla H. Moore;Marla H. Moore;Bertram Donn;Bertram Donn;Raj Khanna;Raj Khanna;Michael F. A'Hearn;Michael F. A'Hearn

  • The global shape, density and rotation of Comet 67P/Churyumov-Gerasimenko from preperihelion Rosetta/OSIRIS observations

    Laurent Jorda;R. Gaskell;C. Capanna;S. Hviid

  • Report of the IAU/IAG Working Group on cartographic coordinates and rotational elements: 2006

    P. Kenneth Seidelmann;B. A. Archinal;M. F. A’hearn;A. Conrad

  • Cyanogen jets in comet Halley

    Michael F. A'Hearn;Susan Hoban;Peter V. Birch;Craig Bowers

  • Earth as an Extrasolar Planet: Earth Model Validation Using EPOXI Earth Observations

    Tyler D. Robinson;Victoria S. Meadows;David Crisp;Drake Deming

  • Shape model, reference system definition, and cartographic mapping standards for comet 67P/Churyumov-Gerasimenko Stereo-photogrammetric analysis of Rosetta/OSIRIS image data

    Frank Preusker;F. Scholten;K.-D. Matz;Thomas Roatsch

  • Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2015

    Brent Archinal;C. H. Acton;M. F. A’Hearn;A. Conrad

  • Insolation, erosion, and morphology of comet 67P/Churyumov-Gerasimenko

    H. U. Keller;S. Mottola;B. Davidsson;S.E. Schröder

  • Alien Maps of an Ocean-Bearing World

    Nicolas B. Cowan;Eric Agol;Victoria S. Meadows;Victoria S. Meadows;Tyler Robinson;Tyler Robinson

  • The fluorescence of cometary OH

    David G. Schleicher;Michael F. A'Hearn

  • Deep Impact: excavating comet Tempel 1

    Michael F. A'Hearn

Frequent Co-Authors

Jean-Loup Bertaux
Jean-Loup Bertaux Atmospheres Laboratory Environments, Observations Spatiales
Laurent Jorda
Laurent Jorda Aix-Marseille University
Francesco Marzari
Francesco Marzari University of Padua
Harold A. Weaver
Harold A. Weaver Johns Hopkins University Applied Physics Laboratory
Nicolas Thomas
Nicolas Thomas University of Bern
Paul D. Feldman
Paul D. Feldman Johns Hopkins University
Wing-Huen Ip
Wing-Huen Ip National Central University
Jessica M. Sunshine
Jessica M. Sunshine University of Maryland, College Park
Peter C. Thomas
Peter C. Thomas Cornell University
Matteo Massironi
Matteo Massironi University of Padua

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Best Scientists Citing Michael F. A'Hearn

Harold A. Weaver

Harold A. Weaver

Johns Hopkins University Applied Physics Laboratory

Publications: 123

Laurent Jorda

Laurent Jorda

Aix-Marseille University

Publications: 118

Nicolas Thomas

Nicolas Thomas

University of Bern

Publications: 103

David Jewitt

David Jewitt

University of California, Los Angeles

Publications: 102

Wing-Huen Ip

Wing-Huen Ip

National Central University

Publications: 102

Francesco Marzari

Francesco Marzari

University of Padua

Publications: 80

Jean-Loup Bertaux

Jean-Loup Bertaux

Atmospheres Laboratory Environments, Observations Spatiales

Publications: 72

Emmanuel Jehin

Emmanuel Jehin

University of Liège

Publications: 62

Ralf Jaumann

Ralf Jaumann

Freie Universität Berlin

Publications: 56

Michael J. Mumma

Michael J. Mumma

Goddard Space Flight Center

Publications: 55

Federico Tosi

Federico Tosi

National Institute for Astrophysics

Publications: 53

M. C. De Sanctis

M. C. De Sanctis

National Institute for Astrophysics

Publications: 50

Dale P. Cruikshank

Dale P. Cruikshank

University of Central Florida

Publications: 49

Frank Scholten

Frank Scholten

German Aerospace Center

Publications: 46

Paul D. Feldman

Paul D. Feldman

Johns Hopkins University

Publications: 44

Christopher T. Russell

Christopher T. Russell

University of California, Los Angeles

Publications: 43

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