2005/08/15 by L. Xu, Lei Xu, Xue-Feng Wu +3
Mathematics · Physics and Astronomy · #Astro and Planetary Science #Astronomy and Astrophysical Research #Astrophysics #Computational physics #Distribution (mathematics) #Energy (signal processing) #Gamma-ray burst #Gamma-ray bursts and supernovae #Isotropy #Jet (fluid) #Mathematical analysis #Mathematics #Mechanics #Optics #Physics #Redshift #Sample (material) #Statistical physics #Thermodynamics #astro-ph
paper · pdf · doi:10.1086/497102
published as Astrophys.J.634:1155-1165,2005 · 36 pages including 16 figures, accepted for publication in ApJ
arxiv created 2005/08/15 · openalex publication_date 2005/11/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a general method for testing gamma-ray burst (GRB) jet structure and carry out a comprehensive analysis of the prevalent jet structure models. According to the jet angular energy distribution, we can not only derive the expected distribution of the GRB isotropic-equivalent energy release for any possible jet structure, but also obtain a two-dimensional distribution including redshift z . By using the Kolmogorov-Smirnov test, we compare the predicted distribution with the observed sample and find that the power-law-structured jet model is most consistent with the current sample and that the uniform jet model is also plausible. However, this conclusion is tentative because of the small size and the inhomogeneity of this sample. Future observations (e.g., Swift ) will provide a larger and less biased sample for us to make a robust conclusion by using the procedure proposed in this paper.