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Tyler Parsotan - Monte Carlo Modeling of Photospheric Emission in Gamma-Ray Bursts
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| We present the analysis of photospheric emission for a set of FLASH simulations. The results are acquired by using the Monte Carlo Radiation Transfer code (MCRaT) to simulate thermal photons scattering through the collimated outflow of long Gamma Ray Bursts (LGRBs) caused by a variety of progenitors and jet conditions. MCRaT allows us to explicitly show the time evolution of the photosphere within the photospheric region in addition to the gradual decoupling of the photon and matter counterparts of the jet. The results of the radiation transfer simulation are also used to construct light curves and time resolved spectra at various viewing angles, which are then used to make comparisons with observed data, and outline the agreement and strain points between the photospheric model and LGRB observations. We find that our fitted time resolved spectral Band β parameters are in agreement with observations, even though we do not consider the effects of non-thermal particles. Finally, the results are found to be consistent with the Yonetoku relation. |
Dave Tsang - Resonant Shattering Flares as EM/GW probes of NS physics
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