Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2012-04-22
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
3 pages, 1 figure
Scientific paper
We show that the experiential $E_{\rm p}-L$, $\Gamma-L$, $E_{\rm p}-\Gamma$ and ${\rm \bar{\eta}_\gamma}-E_{\rm p}$ correlations (where $L$ is the luminosity of the prompt emission, $E_{\rm p}$ is the spectral peak energy, $\Gamma$ is the bulk Lorentz factor and $\bar{\eta}_\gamma$ is the emission efficiency of Gamma-ray Burst (GRB)) are well consistent with the relations between the resembling parameters predicted in the photospheric radiation model of the prompt emission of Gamma-ray Bursts. The time-resolved thermal radiation of GRB 090902B does follow the $E_{\rm p}-L$ and $\Gamma-L$ correlations. A reliable interpretation of the four correlations in alternative models is still lack. These facts may point towards a photospheric origin of prompt emission of some Gamma-ray Bursts.
Fan Yi-Zhong
Wei Da-Ming
Zhang Bin-Bin
Zhang Fu-Wen
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