2026 Raghunathan Srianand: Physics Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Physics	75	3414	3245	15	15	368	17096

Discipline name

D-Index

World Ranking

Current World Ranking

National Ranking

Current National Ranking

Publications

Citations

Physics

3414

3245

368

17096

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

461
Citations
The VLT-UVES survey for molecular hydrogen in high-redshift damped Lyman-$lpha$ systems

Cédric Ledoux;Patrick Petitjean;R. Srianand

436
Citations
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

398
Citations
Velocity-Metallicity Correlation for high-z DLA Galaxies: Evidence for a Mass-Metallicity Relation?

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

357
Citations
Probing the cosmological variation of the fine - structure constant: Results based on VLT - UVES sample

Hum Chand;Raghunathan Srianand;Patrick Petitjean;Bastien Aracil

344
Citations
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

340
Citations
Molecular hydrogen in high-redshift Damped Lyman-alpha systems: The VLT/UVES database

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

338
Citations
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

303
Citations
Velocity-metallicity correlation for high-z DLA galaxies: evidence of a mass-metallicity relation?

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

298
Citations
Molecular hydrogen in high-redshift damped Lyman-α systems : the VLT/UVES database

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

289
Citations
The cosmic microwave background radiation temperature at a redshift of 2.34

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

276
Citations
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

218
Citations
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

208
Citations
First detection of CO in a high-redshift DLA

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

206
Citations
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

204
Citations
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

197
Citations
First detection of CO in a high-redshift damped Lyman-α system

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

192
Citations
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

188
Citations
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

151
Citations
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

148
Citations