2026 I. M. McHardy: Physics Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Physics	93	2058	1954	175	167	439	27287

Discipline name

D-Index

World Ranking

Current World Ranking

National Ranking

Current National Ranking

Publications

Citations

Physics

2058

1954

175

167

439

27287

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

1008
Citations
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

863
Citations
Introducing the CTA concept

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

855
Citations
Active galactic nuclei as scaled-up Galactic black holes

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

752
Citations
Measuring the broadband power spectra of active galactic nuclei with RXTE

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

575
Citations
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

568
Citations
Measuring the broad-band power spectra of active galactic nuclei with RXTE

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

469
Citations
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

427
Citations
Multiwavelength Observations of a Dramatic High-Energy Flare in the Blazar 3C 279

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

349
Citations
X-Ray Fluctuation Power Spectral Densities of Seyfert 1 Galaxies

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

347
Citations
A possible fossil galaxy group

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

323
Citations
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

300
Citations
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

281
Citations
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

276
Citations
Multiwavelength Observations of Markarian 421 During a TeV/X-Ray Flare

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

272
Citations
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

258
Citations
Correlated Multi-Waveband Variability in the Blazar 3C~279 from 1996 to 2007

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

257
Citations
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

250
Citations
The Large Observatory For X-ray Timing: LOFT

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

249
Citations
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

14
Citations