World's Best Scientists 2026 revealed!

D-Index & Metrics

Physics

D-Index
93
Citations
27287
World Ranking
2058
National Ranking
175

I. M. McHardy 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 I. M. McHardy sits on this spectrum.

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 publications 1,469+

This scientist: 439 publications — 45th percentile

45% of scientists in this discipline score the same or lower.

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

I. M. McHardy 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 I. M. McHardy sits on this spectrum.

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 D-Index 185+

This scientist: 93 D-Index — 46th percentile

46% of scientists in this discipline score the same or lower.

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

Overview

I. M. McHardy is a researcher affiliated with the University of Southampton in the United Kingdom, specializing in Physics and Astronomy. Their academic contributions are primarily focused within the subfields of Astronomy and Astrophysics, Nuclear and High Energy Physics, and Instrumentation. Additional areas of involvement include General Health Professions and Biomedical Engineering.

The scientist's work covers a range of topics related to astrophysical phenomena and observations, galaxies' formation and evolution, gamma-ray bursts and supernovae, as well as various cosmic and star formation studies. Specifically, their main research themes include:

  • Astrophysical Phenomena and Observations
  • Galaxies: Formation, Evolution, Phenomena
  • Gamma-ray bursts and supernovae
  • Astrophysics and Cosmic Phenomena
  • Astronomy and Astrophysical Research
  • Astrophysics and Star Formation Studies
  • Stellar, planetary, and galactic studies

McHardy has published extensively, with notable papers including:

  • The Lick AGN Monitoring Project 2016: Velocity-resolved Hβ Lags in Luminous Seyfert Galaxies, 2022, The Astrophysical Journal
  • Evidence for variability time-scale-dependent UV/X-ray delay in Seyfert 1 AGN NGC 7469, 2020, Monthly Notices of the Royal Astronomical Society
  • LeMMINGs - II. The e-MERLIN legacy survey of nearby galaxies. The deepest radio view of the Palomar sample on parsec scale, 2020, Monthly Notices of the Royal Astronomical Society
  • The e-MERGE Survey (e-MERLIN Galaxy Evolution Survey): overview and survey description, 2020, Monthly Notices of the Royal Astronomical Society
  • UV-Optical Disk Reverberation Lags despite a Faint X-Ray Corona in the Active Galactic Nucleus Mrk 335, 2023, The Astrophysical Journal

Their frequent coauthors include K. Horne, R. D. Baldi, M. R. Goad, Aaron J. Barth, and D. González-Buitrago. These collaborations reflect ongoing research partnerships within the astronomy community.

Their research has been disseminated through key scientific journals and archives, notably:

  • Monthly Notices of the Royal Astronomical Society
  • The Astrophysical Journal
  • arXiv (Cornell University)
  • ePrints Soton (University of Southampton)
  • Monthly Notices of the Royal Astronomical Society Letters

Best Publications

  • Design concepts for the Cherenkov Telescope Array CTA: An advanced facility for ground-based high-energy gamma-ray astronomy

    M. Actis;G. Agnetta;F. Aharonian;A. Akhperjanian

  • The inner jet of an active galactic nucleus as revealed by a radio-to-γ-ray outburst

    Alan P. Marscher;Svetlana G. Jorstad;Svetlana G. Jorstad;Francesca D. D'Arcangelo;Paul S. Smith

  • Introducing the CTA concept

    B. S. Acharya;M. Actis;T. Aghajani;G. Agnetta

  • Active galactic nuclei as scaled-up Galactic black holes

    I. M. McHardy;E. Koerding;C. Knigge;P. Uttley

  • Measuring the broadband power spectra of active galactic nuclei with RXTE

    P. Uttley;I. M. McHardy;I. E. Papadakis

  • Probing the Inner Jet of the Quasar PKS 1510?089 with Multi-Waveband Monitoring During Strong Gamma-Ray Activity

    Alan P. Marscher;Svetlana G. Jorstad;Svetlana G. Jorstad;Valeri M. Larionov;Valeri M. Larionov;Margo F. Aller

  • Measuring the broad-band power spectra of active galactic nuclei with RXTE

    P. Uttley;I. M. McHardy;I. E. Papadakis

  • Combined long and short time-scale X-ray variability of NGC 4051 with RXTE and XMM-Newton

    I. M. McHardy;I. E. Papadakis;P. Uttley;M. J. Page

  • Multiwavelength Observations of a Dramatic High-Energy Flare in the Blazar 3C 279

    A. E. Wehrle;E. Pian;C. M. Urry;L. Maraschi

  • X-Ray Fluctuation Power Spectral Densities of Seyfert 1 Galaxies

    A. Markowitz;R. Edelson;S. Vaughan;P. Uttley

  • A possible fossil galaxy group

    T. J. Ponman;D. J. Allan;L. R. Jones;M. Merrifield

  • Space Telescope and Optical Reverberation Mapping Project. III. Optical Continuum Emission and Broad-Band Time Delays in NGC 5548

    M. M. Fausnaugh;K. D. Denney;A. J. Barth;M. C. Bentz

  • X-Ray and Optical Variability in NGC 4051 and the Nature of Narrow-Line Seyfert 1 Galaxies

    B. M. Peterson;I. M. McHardy;Belinda Jane Wilkes;Perry Berlind

  • FLARING BEHAVIOR OF THE QUASAR 3C 454.3 ACROSS THE ELECTROMAGNETIC SPECTRUM

    Svetlana G. Jorstad;Svetlana G. Jorstad;Alan P. Marscher;Valeri M. Larionov;Valeri M. Larionov;Iván Agudo

  • Multiwavelength Observations of Markarian 421 During a TeV/X-Ray Flare

    D. J. Macomb;C. W. Akerlof;H. D. Aller;M. F. Aller

  • MCG–6-30-15: long time-scale X-ray variability, black hole mass and active galactic nuclei high states

    I. M. McHardy;K. F. Gunn;P. Uttley;M. R. Goad

  • Correlated Multi-Waveband Variability in the Blazar 3C~279 from 1996 to 2007

    R. Chatterjee;S. G. Jorstad;A. P. Marscher;H. Oh

  • The structure and emission model of the relativistic jet in the quasar 3C 279 inferred from radio to high-energy gamma-ray observations in 2008-2010

    M. Hayashida;G. M. Madejski;K. Nalewajko;M. Sikora

  • The Large Observatory For X-ray Timing: LOFT

    M. Feroci;L. Stella;M. van der Klis;T. J.-L. Courvoisier

  • Combined long and short timescale X-ray variability of NGC 4051 with RXTE and XMM-Newton

    I.M. McHardy;I.E. Papadakis;P. Uttley;K.O. Mason

Frequent Co-Authors

Valeri M. Larionov
Valeri M. Larionov Saint Petersburg State University
Marianne Vestergaard
Marianne Vestergaard University of Copenhagen
Jelle Kaastra
Jelle Kaastra Leiden University
Alan P. Marscher
Alan P. Marscher Boston University
Keith Horne
Keith Horne University of St Andrews
Hugh D. Aller
Hugh D. Aller University of Michigan–Ann Arbor
Kirk T. Korista
Kirk T. Korista Western Michigan University
Misty C. Bentz
Misty C. Bentz Georgia State University
Aaron J. Barth
Aaron J. Barth University of California, Irvine
Tommaso Treu
Tommaso Treu University of California, Los Angeles

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