Synchrotron self-absorption alters radiation-mediated shock profiles for magnetizations above 10^{-8}, subshocks appear above 0.1, and hadronic processes add a high-energy photon tail with negligible effect on overall shock dynamics.
Photospheric Emission of Gamma-Ray Bursts
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We review the physics of GRB production by relativistic jets that start highly opaque near the central source and then expand to transparency. We discuss dissipative and radiative processes in the jet and how radiative transfer shapes the observed nonthermal spectrum released at the photosphere. A comparison of recent detailed models with observations gives estimates for important parameters of GRB jets, such as the Lorentz factor and magnetization. We also discuss predictions for GRB polarization and neutrino emission.
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Magnetized Shocks Mediated by Radiation from Leptonic and Hadronic Processes
Synchrotron self-absorption alters radiation-mediated shock profiles for magnetizations above 10^{-8}, subshocks appear above 0.1, and hadronic processes add a high-energy photon tail with negligible effect on overall shock dynamics.