Publications (5)
Bayesian Time-Resolved Spectroscopy of Multi-Pulsed GRBs: Variations of Emission Properties amongst Pulses
Liang Li, Felix Ryde, Asaf Pe'er +2
Gamma-ray bursts (GRBs) are highly variable and exhibit strong spectral evolution. In particular, the emission properties vary from pulse to pulse in multipulse bursts. Here we pre…
Non-dissipative photospheres in GRBs: Spectral appearance in the Fermi/GBM catalogue
Zeynep Acuner, Felix Ryde, Hoi-Fung Yu
A large fraction of gamma-ray burst (GRB) spectra are very hard below the peak. Indeed, the observed distribution of sub-peak power-law indices, , has been used as an argument…
The Fraction of Gamma-ray Bursts with an Observed Photospheric Emission Episode
Zeynep Acuner, Felix Ryde, Asaf Pe'er +2
There is no complete description of the emission physics during the prompt phase in gamma-ray bursts. Spectral analyses, however, indicate that many spectra are narrower than what…
Emission from accelerating jets in gamma-ray bursts: Radiation dominated flows with increasing mass outflow rates
Felix Ryde, Christoffer Lundman, Zeynep Acuner
We study the narrowest spectra expected from gamma-ray bursts. We present an analytical function for the spectrum that is emitted from the photosphere of a radiation-dominated flow…
Clustering of gamma-ray burst types in the Fermi-GBM catalogue: indications of photosphere and synchrotron emissions during the prompt phase
Zeynep Acuner, Felix Ryde
Many different physical processes have been suggested to explain the prompt gamma-ray emission in gamma-ray bursts (GRBs). Although there are examples of both bursts with photosphe…