Sixteenth Marcel Grossmann Meeting

The photospheric origin of $E_p$-$L_p$ and $E_p$-$E_{iso}$ correlations in GRBs

9 Jul 2021, 08:30

20m

Invited talk in the parallel session Gamma-Ray Burst Correlations: Observational Challenges and Theoretical Interpretation Gamma-Ray Burst Correlations: Observational Challenges and Theoretical Interpretation

Speaker

Hirotaka Ito (RIKEN)

Description

In the current study, we present hydrodynamical simulations and post-process radiation transfer calculations of photospheric emission in GRBs. Our simulations show that the photospheric emission can reproduce the observed correlations among the spectral peak energy, $E_p$, peak luminosity, $L_p$, and isotropic energy, $E_{iso}$, as a consequence of the viewing angle dependence. We also find that the time-resolved property of the emission shows $E_p$–$L_{iso}$ tracking behavior that is consistent which the observation.