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astro-ph.HE2024
Theory of photon scattering in shearing plasma: Applications to GRBs
Mukesh Kumar Vyas, Asaf Pe'er
We explore a new mechanism for photon energy gain in a relativistic plasma with velocity shear. This process takes place in optically thick plasma and resembles conventional Fermi…
astro-ph.HE2024
Unified theory of negative and positive spectral lags in GRB prompt phase due to shear Comptonization from a structured jet
Mukesh Kumar Vyas, Asaf Pe'er, Shabnam Iyyani
Positive spectral lags are commonly observed in gamma-ray burst (GRB) prompt phase where soft photons lag behind hard ones in their spectral studies. Opposite to this pattern, a fr…