World's Best Scientists 2026 revealed!

D-Index & Metrics

Physics

D-Index
75
Citations
17096
World Ranking
3414
National Ranking
15

Raghunathan Srianand 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 Raghunathan Srianand 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: 368 publications — 31st percentile

31% of scientists in this discipline score the same or lower.

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

Raghunathan Srianand 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 Raghunathan Srianand 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: 75 D-Index — 9th percentile

9% of scientists in this discipline score the same or lower.

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

Overview

Raghunathan Srianand is affiliated with the Inter-University Centre for Astronomy and Astrophysics in India. Their research primarily focuses on Physics and Astronomy, with a specialization in the subfields of Astronomy and Astrophysics, Nuclear and High Energy Physics, Instrumentation, Atomic and Molecular Physics, and Optics, as well as Statistical and Nonlinear Physics.

Their work covers a broad range of topics including:

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

Srianand has contributed extensively to the academic literature with notable recent papers such as:

  • A consistent and robust measurement of the thermal state of the IGM at 2 ≤ z ≤ 4 from a large sample of Ly α forest spectra: evidence for late and rapid He ii reionization (2021), published in Monthly Notices of the Royal Astronomical Society
  • The Hydrogen Intensity and Real-time Analysis eXperiment: 256-Element Array Status and Overview (2021), published on arXiv (Cornell University)
  • First discoveries and localizations of Fast Radio Bursts with MeerTRAP: real-time, commensal MeerKAT survey (2022), published in Monthly Notices of the Royal Astronomical Society
  • The COS-legacy survey of C iv absorbers: properties and origins of the intervening systems (2021), published in Monthly Notices of the Royal Astronomical Society
  • Damped Lyα Absorbers in Star-forming Galaxies at z < 0.15 Detected with the Hubble Space Telescope and Implications for Galactic Evolution (2022), published in The Astrophysical Journal

Their publications frequently appear in these venues:

  • Monthly Notices of the Royal Astronomical Society
  • arXiv (Cornell University)
  • The Astrophysical Journal
  • The Astrophysical Journal Letters
  • HAL (Le Centre pour la Communication Scientifique Directe)

Srianand has collaborated multiple times with several researchers, including:

  • P. Noterdaeme
  • N. Gupta
  • J.-K. Krogager
  • F. Combes
  • S. A. Balashev

Best Publications

  • Limits on the time variation of the electromagnetic fine-structure constant in the low energy limit from absorption lines in the spectra of distant quasars.

    R. Srianand;H. Chand;P. Petitjean;B. Aracil

  • The VLT-UVES survey for molecular hydrogen in high-redshift damped Lyman-$lpha$ systems

    Cédric Ledoux;Patrick Petitjean;R. Srianand

  • The Very Large Telescope Ultraviolet and Visible Echelle Spectrograph survey for molecular hydrogen in high‐redshift damped Lyman α systems

    Cédric Ledoux;Patrick Petitjean;R. Srianand

  • Velocity-Metallicity Correlation for high-z DLA Galaxies: Evidence for a Mass-Metallicity Relation?

    C. Ledoux;P. Petitjean;J. P. U. Fynbo;P. Moller

  • Probing the cosmological variation of the fine - structure constant: Results based on VLT - UVES sample

    Hum Chand;Raghunathan Srianand;Patrick Petitjean;Bastien Aracil

  • Evolution of the cosmological mass density of neutral gas from Sloan Digital Sky Survey II - Data Release 7

    P. Noterdaeme;P. Noterdaeme;P. Petitjean;C. Ledoux;R. Srianand

  • Molecular hydrogen in high-redshift Damped Lyman-alpha systems: The VLT/UVES database

    P. Noterdaeme;C. Ledoux;P. Petitjean;R. Srianand

  • The VLT-UVES survey for molecular hydrogen in high-redshift damped Lyman-alpha systems: Physical conditions in the neutral gas

    Raghunathan Srianand;Patrick Petitjean;Cedric Ledoux;Gary Ferland

  • Velocity-metallicity correlation for high-z DLA galaxies: evidence of a mass-metallicity relation?

    C. Ledoux;P. Petitjean;J. P. U. Fynbo;P. Møller

  • Molecular hydrogen in high-redshift damped Lyman-α systems : the VLT/UVES database

    P. Noterdaeme;P. Noterdaeme;C. Ledoux;P. Petitjean;R. Srianand

  • The cosmic microwave background radiation temperature at a redshift of 2.34

    R. Srianand;P. Petitjean;P. Petitjean;C. Ledoux

  • The VLT-UVES survey for molecular hydrogen in high-redshift damped Lyman α systems: physical conditions in the neutral gas

    Raghunathan Srianand;Patrick Petitjean;Cédric Ledoux;Gary J. Ferland

  • Discovery of a compact gas-rich DLA galaxy at z = 2.2: evidences for a starburst-driven outflow

    P. Noterdaeme;P. Laursen;P. Petitjean;S. D. Vergani

  • First detection of CO in a high-redshift DLA

    R. Srianand;P. Noterdaeme;C. Ledoux;P. Petitjean

  • The evolution of the cosmic microwave background temperature Measurements of TCMB at high redshift from carbon monoxide excitation

    P. Noterdaeme;P. Petitjean;R. Srianand;C. Ledoux

  • Dust-depletion sequences in damped Lyman-{lpha} absorbers: a unified picture from low-metallicity systems to the Galaxy

    Annalisa De Cia;Cédric Ledoux;Lars Mattsson;Patrick Petitjean

  • First detection of CO in a high-redshift damped Lyman-α system

    R. Srianand;P. Noterdaeme;P. Noterdaeme;C. Ledoux;P. Petitjean

  • Dust-depletion sequences in damped Lyman-α absorbers - A unified picture from low-metallicity systems to the Galaxy

    A. De Cia;A. De Cia;C. Ledoux;Lars Mattsson;P. Petitjean

  • A new constraint on the time dependence of the proton-to-electron mass ratio - Analysis of the Q 0347-383 and Q 0405-443 spectra

    A. Ivanchik;P. Petitjean;D. Varshalovich;B. Aracil;B. Aracil

  • Discovery of a compact gas-rich damped Lyman-α galaxy at z = 2.2: evidence of a starburst-driven outflow

    P. Noterdaeme;P. Noterdaeme;Peter Laursen;Peter Laursen;P. Petitjean;S. D. Vergani

Frequent Co-Authors

Patrick Petitjean
Patrick Petitjean Institut d'Astrophysique de Paris
Pasquier Noterdaeme
Pasquier Noterdaeme University of Chile
C. Ledoux
C. Ledoux European Southern Observatory
Andrew J. Baker
Andrew J. Baker Rutgers, The State University of New Jersey
Francoise Combes
Francoise Combes Collège de France
Johan P. U. Fynbo
Johan P. U. Fynbo University of Copenhagen
Sara L. Ellison
Sara L. Ellison University of Victoria
Michael T. Murphy
Michael T. Murphy Swinburne University of Technology
Paolo Molaro
Paolo Molaro National Institute for Astrophysics
Gary J. Ferland
Gary J. Ferland University of Kentucky

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