GB11 - Plasma acceleration and transparency in GRBs |
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Speaker |
Guzman, Francisco S. |
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Coauthors |
Rivera-Paleo, Francisco |
| Talk Title |
Long-Low Luminosity GRBs Modeled With Jets Emerging From Progenitors And Driven By Relativistic Radiation Hydrodynamics |
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Abstract |
We present numerical simulations of jets modeled with Relativistic Radiation Hydrodynamics (RRH) triggered from inside a progenitor. We consider opacities consistent with interaction between the fluid and radiation of type free-free, bound-free, bound-bound and electron scattering. We explore various initial conditions, with different radiation energy densities of the beam in hydrodynamical and radiation pressure dominated scenarios, considering only highly-relativistic jets. In order to investigate the effect of the thermal radiation field on the evolution of these jets, we compare our results with purely hydrodynamical ones. Comparing among jets driven by RRH, we find that radiation pressure dominated jets propagate slightly faster than gas pressure dominated ones. We track the temperature of the fluid and radiation, showing they differ up to four orders of magnitude, indicating the two components are not in thermal equilibrium during the evolution of the jet. We construct the luminosity Light Curves (LCs) associated with the jets using the fluxes of the radiation field itself, which is fully coupled to the hydrodynamics equations during the evolution. We construct jets breaking out from the progenitor star with LCs of magnitude within the range of low-luminosity GRBs $10^{46}-10^{49}$ erg/s. Our results indicate that thermal radiation from jets emerging from a progenitor is a good candidates to explain the Long-Low Luminosity GRB events. |
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