Appearances of the jet photosphere in GRB spectra
| Autor: | Zeynep Acuner, Felix Ryde |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Thermal emission Photosphere Jet (fluid) Astrophysics::High Energy Astrophysical Phenomena Photospheric emission Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Emission spectroscopy Thermal emissions Spectral line Emission spectrums Relativity Astronomi astrofysik och kosmologi Physical scenario GRBs Multicomponent model Off-axis Astrophysics::Solar and Stellar Astrophysics Astronomy Astrophysics and Cosmology Astrophysics::Earth and Planetary Astrophysics Gamma-ray burst Synchrotron emission Astrophysics::Galaxy Astrophysics |
| Popis: | There are several strong arguments for considering photospheric emission in GRBs. Here, we describe the two main appearances of the photospheric emission that are currently discussed. In the multi-component models the photosphere only contributes to a part of the spectrum, while the main part is due to optically-thin synchrotron emission. In the photospheric emission models the whole emission spectrum is from the photosphere: The emission spectrum has been altered due to subphotospheric dissipation and/or off-axis emission. In many cases, though, it is difficult to distinguish between these models on a purely statistical ground. Therefore, more detailed predictions from different physical scenarios should be tested on the observations. QC 20190418 |
| Databáze: | OpenAIRE |
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