= R. Srianand
{c}
An astrophysicist whose research uses absorption features in distant <quasar> <spectra> to probe intervening gas. High-resolution measurements constrain physical conditions in early galaxies and can test whether fundamental constants changed over cosmic time. His work also uses atomic fine-structure lines to investigate the evolution of the <cosmic microwave background> temperature.<Research profile of R. Srianand at IUCAA>[Institutional research description: quasar absorption systems, fundamental constants and CMB-temperature tests]{ref}
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