2021/03/31 by Mukesh Kumar Vyas, Mukesh K. Vyas, Asaf Pe’er +2
Physics and Astronomy · #Annihilation #Astrophysics and Cosmic Phenomena #Bremsstrahlung #Compton scattering #Gamma-ray burst #Gamma-ray bursts and supernovae #Neutrino Physics Research #Phase (matter) #Photon #Radiation #Scattering #Spectral line #astro-ph.HE #physics.space-ph
paper · pdf · doi:10.3847/2041-8213/ac1d56
7 Pages, 5 Figures, Submitted to ApJL
openalex created_date 2021/03/15 · arxiv created 2021/08/05 · openalex publication_date 2021/08/26 · arxiv updated 2021/09/08 · openalex updated_date 2026/08/05
Abstract We present new results of the backscattering-dominated prompt emission model in which the photons generated through pair annihilation at the center of a gamma-ray burst (GRB) are backscattered through Compton scattering by an outflowing stellar cork. Using a Comptonized pair annihilation spectrum accompanied by bremsstrahlung radiation for seed photons, we show that the obtained spectra produce a low-energy photon index in the range α ∼ −1.95 to −1.1, steeper high-energy slopes β ∼ −3.5 to −2.4, and spectral peak energies approximately a few KeV to a few tens of MeV. These findings are consistent with the values covered in GRB prompt phase observations.