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astro-ph.GA2025
Evidence for in-situ acceleration of relativistic particles in the wings of X-shaped radio galaxies
Dusmanta Patra, Gopal-Krishna, Ravi Joshi
We report evidence for in-situ acceleration/re-acceleration of relativistic particles in 11 radio wings out of a total of 68 wings sufficiently well-resolved for spectral mapping,…
astro-ph.GA2025
Weak-emission-line quasars: A new clue from their optical variability
Ritish Kumar, Gopal-Krishna, Hum Chand +1
Weak-emission-line QSOs (WLQs) are an enigmatic subclass of the QSO population, as their optical/UV spectra are marked by abnormally weak (or absent) emission lines. To obtain much…
astro-ph.GA2024
GPS in the cosmos
Gopal-Krishna
This note chronicles the early steps and incidences from over four decades ago, that gave a kickstart to research on the now prominent subclass of radio galaxies, called 'Gigahertz…