activity
19952026
most citedLimits on the time variation of the electromagnetic fine-structure constant in the low energy limit from absorption lines in the spectra of distant quasars

335 citations · 8.1k across the 221 of their papers we have counts for

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Showing astro-ph.COShow all

68 papers · 1 filter

astro-ph.CO2023

Role of ionizing background and galactic feedback on the redshift space clustering of OVI absorbers in hydrodynamical simulations

Soumak Maitra, Sukanya Mallik, Raghunathan Srianand

We explore the effect of ionizing UV background (UVB) on the redshift space clustering of low- () OVI absorbers using Sherwood simulations incorpor…

astro-ph.CO2021★ 4 cited

Measurement of redshift-space two- and three-point correlation of Ly absorbers at : Implications on evolution of the physical properties of IGM

Soumak Maitra, Raghunathan Srianand, Prakash Gaikwad

We present redshift space two-point (), three-point () and reduced three-point (Q) correlations of Ly absorbers (Voigt profile components having HI column density, $N_{\rm…

astro-ph.CO2021★ 21 cited

Estimation of the CMB temperature from atomic C\,{\sc i} and molecular CO lines in the interstellar medium of early galaxies

V. V. Klimenko, A. V. Ivanchik, P. Petitjean +2

The linear increase of the cosmic microwave background (CMB) temperature with cosmological redshift, , is a prediction of the standard cosmological CDM…

astro-ph.CO2021★ 3 cited

Constraining the ratio of median pixel optical depth profile around z ~ 4 quasars using the longitudinal proximity effect

Priyanka Jalan, Hum Chand, Raghunathan Srianand

We present a detailed study of the longitudinal proximity effect using a sample of 85 quasars spanning an emission redshift range of and Lyman continuum…

astro-ph.CO2020★ 103 cited

A consistent and robust measurement of the thermal state of the IGM at from a large sample of Ly forest spectra: Evidence for late and rapid HeII reionization

Prakash Gaikwad, Raghunathan Srianand, Martin G. Haehnelt +1

We characterise the thermal state of the intergalactic medium (IGM) in ten redshift bins in the redshift range with a sample of 103 high resolution, high S/N Ly$α…

astro-ph.CO2020★ 7 cited

Three- and two-point spatial correlations of IGM at : Cloud based analysis using simulations

Soumak Maitra, Raghunathan Srianand, Prakash Gaikwad +3

Ly forest absorption spectra decomposed into multiple Voigt profile components (clouds) allow us to study clustering of intergalactic medium (IGM) as a function of HI column den…