4 papers
Radiation-mediated shocks in gamma-ray bursts: spectral evolution
Filip Alamaa, Frédéric Daigne
Radiation-mediated shocks (RMSs) occurring below the photosphere in a gamma-ray burst (GRB) jet could play a crucial role in shaping the prompt emission. In this paper, we study th…
From Internal Collision to Photon Escape: First-Principles Modeling of Radiation-Mediated Shocks in Gamma-Ray Burst Photospheres
Jona Nordin Nobuoka, Filip Alamaa, Felix Ryde +1
Modeling subphotospheric shocks in a gamma-ray burst (GRB) is challenging due to the various timescales that must be resolved, and the fact that the same radiation dynamically medi…
Photospheric emission from GRB 211211A altered by a strong radiation-mediated shock
Oscar Wistemar, Filip Alamaa, Felix Ryde
Gamma-ray burst (GRB) spectra are typically non-thermal, with many including two spectral breaks suggestive of optically-thin emission. However, the emitted spectrum from a GRB pho…
A generalized method to measure the Lorentz factor from gamma-ray burst photospheric emission
Oscar Wistemar, Felix Ryde, Filip Alamaa
The properties of gamma-ray bursts (GRBs) that are inferred from observations depend on the value of the bulk Lorentz factor, . Consequently, accurately estimating it is an imp…